8l90 Torque Converter Shudder

We've been having a ton of complaints with torque converter shudder on the 8L90 trans. I had a 2013 ATS with a non-turbo base 2. Again, I've had harmonic balance problems in prior MoPars; one was a mismatched torque converter, and the other (on three separate cars over a 20-year period: a '65 Fury, a '74 Fury, and an '83 Ram conversion van) was due to failing U-joints, This doesn't feel anything like that. I agree though, I cant see every damn one having the problem. Castrol Transmax Dexron® -VI Mercon® LV | Castrol. TRNW members interact on everything from rebuilding tips, diagnostic help, troubleshooting, parts locating, and the art. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform. I just posted 19. Custom Built Vigilante GM Torque Converters For: Impala SS / Turbo Buick / Camaro & Firebird LS1 / Corvette / GTO / Pontiac G8 / Cadillac CTS-V / Trailblazer / 5th Generation Camaro / Silverado Truck / And many more!. Select the navigation view you prefer when narrowing your search. I have tuned it out. A shudder condition may also be a chuggle, surge or vibration condition. Read 2017 GMC Sierra 1500 Owner Reviews, Expert Reviews, Prices, Specs and Photos. 5 ltr 4 cylinder mated to a 6L45 with this exact unrepairable torque converter shudder design defect. 031 75005 Bushing, 125 Converter Hub 1980-81 1 64032 64031 8631907 031 75005A Bushing, 125C Converter Hub 1982-Up 1 64032B 64031B 8637905 032 65002 Bushing, 125/125C Converter Reactor/Drive Sprocket Support, 1980-Up 1 54036A 54036A 8628915. You don't buy them for gas mileage. Specifications. IIRC there is a transmission software update for our cars to address this, and some vehicles have had to have the torque converter replaced. I'll come right out and state that this week's RemanU may have less insights than what you have come to exapect and little to no call to action. I recently looked at the most recent copy of the TSB for the AFM induced torque converter shudder for the 8L45/8L90 8 speed transmissions (used in everything from compact Cadillacs through full size gas powered trucks and SUVs) which were introduced for model year 2015 and the latest word is they will have a "final" solution sometime in first. (though the lawsuit only covers certain models/years equipped with 8L45 and 8L90 transmissions the torque converter design defect also exists in the 6L45 back to 2013 and 2014. My 2016 has been in the shop 4 times for torque converter/transmission related issues. After all, the torque converter problems require several thousands of miles to be put in on the newest Corvettes and plenty of buyers hardly drive their newest acquisitions. • The gear sets then transfer torque and sends it to the output shaft. PATC performance torque converters are manufactured in-house at our state of the art torque converter shop. This database includes information received by NHTSA from consumers either directly or as recorded by the Vehicle Safety Hotline. GM 8L90 and 8L45 transmission problems have caused a proposed class action lawsuit that alleges the 8-speed transmissions are defective in the following vehicles in California, Illinois, Michigan. Technical Service Bulletin – Transmission Fluid Guide. 19 ET was enough to get the record, it was NOT what had the stockers talking. That fixed my torque converter shudder and from reports on the forum for these trucks it seems to have solved the problem. or 8l90 regular production option. According to TSB (Technical Service Bulletin) 18-NA-355, the latest update addresses "torque converter clutch (TCC) shudder conditions on 8L45 and 8L90" eight-speed automatic transmissions, RPO codes M5N, M5T, M5U, and M5X. As expected, the undersized and high spinning torque converter issues manifest themselves in a shudder and jerky motion the car starts demonstrating, accompanied by fluctuating engine rpms. 2 with 8L90 transmissions will develop a shake, shudder, excessive RPM fluctuation. I just got my Camaro back from the shop after they fixed my torque converter. DOREEN ROWE, a nurse, campaigner and member of the Windrush Generation, passed away last month at the age of 89. Superchips is thrilled to announce that the transmission tuning is now supported on the Flashpaq for 2015-2016 GMC and Chevrolet trucks equipped with the 8 speed transmission. TCRS Torque Converter balancer now with automatic weight indexing, runout compensa-tion mode, push buttom polishing and better accuracy and repeatability than ever before TCRS Torque Converter Testing and Rebuilding Systems Excellent profit center for transmission repair shops or stand-alone. See 2017 GMC Sierra 1500 technical service bulletins (TSBs) at TrueDelta, organized by model year and problem area or torque converter shudder for the 8l45. Engineer reviews have proven that replacing the torque converter does not provide a long- term solution to TCC shudder. Affected vehicles include Chevrolet, GMC and Cadillac vehicles, as follows. The 8L90 is the subject of a class-action lawsuit filed in December 2018 that alleges the transmission suffers from persistent "shudder" issues and that GM has known about the problems since its introduction and has failed to provide a solution, instead choosing to wait until the unit is out of warranty. This will increase the stall speed approximately 1000 rpm over stock, to around 3000-3200 rpm. After making my second appointment to have the known torque converter shudder on my 2016 Yukon Denali addressed they did not want to work on it due to having a dealer installed supercharger. 55 gear ratio, the 2 brakes are reacting a total of 3550 Nm of torque. In the near future, I foresee many more 8L45/8L90 transmissions showing up. The torque converter is a fluid turbine drive and - like those on its predecessor transmissions, the TH350C, 700R4, 4L60, and 4L80E - features a lock-up pressure plate for direct mechanically coupled driving from the engine crank. But it was in 5 vehicles all less than 2 years old. 2017 CHEVROLET COLORADO TSBs (484) torque converter information from the field on vehicles that have the condition of a torque converter shudder. Think about time spent in top gear with torque converter locked up on a full size truck with some load in or behind it - how much higher can this. Use GDS 2 or the CH-51450 PicoScope to confirm that the concern is TCC shudder and not a tire/wheel vibration or a driveline vibration, for example. These vehicles may have a condition in which transmission calibration allows a higher than target energy input to the torque converter clutch (TCC) under certain conditions. Get 8L45 transmission rebuilding tips, 8L45 troubleshooting help, 8L45 technical service bulletins, 8L45 diagnostics and 8L45 technical information from TRNW. com Failing torque converter symptoms include temperature gauge overheating, large amount of black material in fluid, stall speed increase, or strange sounds coming from the torque converter. List of 2016 CHEVROLET SUBURBAN Factory Technical Service Bulletin - TSB | AutoCodes. As quick as it appeared, it is gone, until the next time it occurs. I recently looked at the most recent copy of the TSB for the AFM induced torque converter shudder for the 8L45/8L90 8 speed transmissions (used in everything from compact Cadillacs through full size gas powered trucks and SUVs) which were introduced for model year 2015 and the latest word is they will have a "final" solution sometime in first. Vibrations not identified as TCC Shudder should be further investigated using the Vehicle Vibration Diagnosis in SI as a starting point. The complaint says it causes undue friction, causing hydraulic systems and gears to function improperly and sometimes leaves metal shavings throughout the transmission, leading to costly repairs and replacement of parts or the entire transmission. Begin logging and monitor the TCC line pressure. 6L80E Transmission, 6l80e Welcome to the official 6l80e transmission website. As expected, the undersized and high spinning torque converter issues manifest themselves in a shudder and jerky motion the car starts demonstrating, accompanied by fluctuating engine rpms. Why Do We Still Call it a Product Review? September 03, 2019. The revision was to help correct a torque converter clutch shudder in the GM 8L90, 8L80, and 8L45 automatic transmissions. 2015 Chevy Silverado 6. If the concern is still present with the torque converter clutch disabled (Mode B) or with the torque converter clutch enabled (Mode C, TCC slip speed at zero), then the vibration root cause is NOT TCC Shudder. The Best Resource for Chevrolet Corvette News, Rumors, and Owner Information. BMW, for example, only sells the new M5 with ZF’s 8HP torque converter transmission as opposed to the old dual-clutch. I had a 2013 ATS with a non-turbo base 2. Custom Built Vigilante GM Torque Converters For: Impala SS / Turbo Buick / Camaro & Firebird LS1 / Corvette / GTO / Pontiac G8 / Cadillac CTS-V / Trailblazer / 5th Generation Camaro / Silverado Truck / And many more!. TCRS Torque Converter balancer now with automatic weight indexing, runout compensa-tion mode, push buttom polishing and better accuracy and repeatability than ever before TCRS Torque Converter Testing and Rebuilding Systems Excellent profit center for transmission repair shops or stand-alone. If the slip speed is beyond 10 rpm or there is shudder during TCC apply the torque converter should be replaced following the instructions published in Service Information (SI). The complaint says it causes undue friction, causing hydraulic systems and gears to function improperly and sometimes leaves metal shavings throughout the transmission, leading to costly repairs and replacement of parts or the entire transmission. We specialize in high performance / heavy duty converters that can be built to your specifications. After making my second appointment to have the known torque converter shudder on my 2016 Yukon Denali addressed they did not want to work on it due to having a dealer installed supercharger. [Archive] Page 3 General discussions on the 2016+ Cadillac CTS-V. Has GM addressed the torque related problems with its 8l90 update?. 00 Select options; 8L90 Transmission, #RGPZ-019 Raybestos GPZ Clutch Module 2015-On (M5U). Superchips is thrilled to announce that the transmission tuning is now supported on the Flashpaq for 2015-2016 GMC and Chevrolet trucks equipped with the 8 speed transmission. Summary: This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicles that may have a grind, pop, shudder or bind feeling/noise in the steering column when turning left or right. Overdrive Pressure Plate Easily add extra capacity to the OD stack in all models All RFE units 1999-2018. Converters are then pressure tested and dynamically balanced prior to certification and ready for use. Specializing in vehicles equipped with the 6L80/90 transmission, the 8L90 transmission, and the 6T70 transmission. Select the navigation view you prefer when narrowing your search. Shudder Symptoms. http://johnzacharyphotography. They point to the comfy but confident ride, the fuel-efficient engines, roomy. The Mercedes 722. Our shop can fully rebuild or complete a fluid flush for your car's transmission. Novak Conversions is the leading company in high quality Jeep Conversions foir GM powertrains. "Do NOT replace the torque converter or transmission assembly for this condition. • The gear sets then transfer torque and sends it to the output shaft. Let GM take one more swing at the problem and then take legal action. Quite a lot has been written and many technical classes have been put on regarding the General Motors 8L45/8L90 family of transmissions. The 6L80E transmission is prone to issues that include: 2-3 harsh or delayed shifts, harsh or delayed shifts from park or reverse, burnt 1-2-3-4, or 3-5 reverse clutch, check engine light (DTC P0751 Code), converter shudder due to flaking of the converter lining, shudder on low/reverse apply, TEHCM and/or CAN software malfunction. Think about time spent in top gear with torque converter locked up on a full size truck with some load in or behind it - how much higher can this. 3L 8-cyl Engine Code [C] L83 Flex-fuel. The torque converter turns the engine's rotational speed into a twisting force to propel your vehicle, and delivers additional gear ratio when driving at highway speeds. Mobil 1 Synthetic LV ATF HP is a high performance synthetic formulation that delivers extended transmission life with its improved oxidation and thermal stability. (though the lawsuit only covers certain models/years equipped with 8L45 and 8L90 transmissions the torque converter design defect also exists in the 6L45 back to 2013 and 2014. is an international network of transmission technicians, transmission rebuilders, and transmission shop owners who discuss every aspect of running a transmission repair facility. Original equipment transmissions & transfer cases you can trust Tested to meet or exceed GM OE specifications, only Genuine GM Parts offers transmissions and transfer cases designed specifically to fit your exact Chevrolet, Buick, GMC, or Cadillac vehicle. According to the 83-page lawsuit, the GM 8L90 and 8L45 transmissions found in General Motors vehicles made between 2015 and 2018 are prone to manifesting a significant “shake, shudder, jerk, clunk or ‘hard shift’” when a driver accelerates and the transmission changes gears. The complaint says it causes undue friction, causing hydraulic systems and gears to function improperly and sometimes leaves metal shavings throughout the transmission, leading to costly repairs and replacement of parts or the entire transmission. The Mercedes 722. The exact speed doesn't matter much since the problem and replicated at speeds from 50 to 90 mph. 2 with 8 speed just started the torque converter shudder at 35,000 miles. World's Best Oils & Filters for 2017 CHEVROLET TRUCKS SILVERADO 1500 PICKUP 5. As with earlier Hydramatics, the 6L80 will accept either the 258mm or 300mm torque converters. 6L80E Transmission, 6l80e Welcome to the official 6l80e transmission website. Find Mobil 1 Synthetic LV ATF HP 124715 and get Free Shipping on Orders Over $99 at Summit Racing! Mobil 1 Synthetic LV ATF HP is an advanced full synthetic automatic transmission fluid formulated from synthetic base oils and an advanced additive system. As of March 1, 2019, bulletin #18-NA-355 was released to address this issue. A new transmission fluid exchange procedure and new formula of Mobil 1 Synthetic LV ATF HP transmission fluid is being released to address torque converter shudder on 8L45 and 8L90 applications. The design of the torque converter for the 8L90 was a new higher efficiency "pancake" TC. We are now seeing oppor R & R Tech: Picking Up Bad Vibrations - Transmission Digest. The issues appear to stem from moisture in the transmission fluid. A new transmission fluid exchange procedure and a new formula of Mobil 1 Synthetic LV ATF HP transmission fluid have been released to address torque converter clutch (TCC) shudder conditions […]. 2016 Chevrolet Tahoe Technical Service Bulletins. The complaint says it causes undue friction, causing hydraulic systems and gears to function improperly and sometimes leaves metal shavings throughout the transmission, leading to costly repairs and replacement of parts or the entire transmission. TRNW, Transmission Rebuilders Network Worldwide. The most recently reported issues are listed below. It would nice if Cadiilac would get off dead center, admit they produced a 8L90 tranny with a serious flaw and ALL their 2015 6. This will increase the stall speed approximately 1000 rpm over stock, to around 3000-3200 rpm. 2-liter V8/eight-speed combo is good for a 0-60 time of 3. Also please check out the statistics and reliability analysis of GMC Sierra 1500 based on all problems reported for the Sierra 1500. Updated Pendulum Torque Converter 6L50/80/90 No Reverse After Valve Body Replacement 6L80/90 No 4th, 5th, 6th Gears, Possible DTC P0796 Burnt 2-6 Clutch Delayed Engagement, Slip, Shudder, Clutch Damage Interchange 1-2-3-4/3-5-R Drum Intermittently Neutrals on Launch 8L45/8L90 Harsh Shifts Delayed Engagement, Drops Out of Gear at Stop Signs 8L90. com/ http://apexautom. 5 ltr 4 cylinder mated to a 6L45 with this exact unrepairable torque converter shudder design defect. GMC Sierra 1500 owners have reported 5 problems related to vehicle shudder (under the power train category). This 2017 technical seminar from Automatic Transmission Rebuilders Association (ATRA) is a problem solving program for units with unusual problems that aren't easy to fix. Transmissions, or gearboxes depending on where you're from, provide a reverse gear and mechanical advantage to the engine's power output. has completed its product testing in search of a solution to a well known torque converter clutch shudder issue found in GM 8-speed transmissions, in particular, the 8L45 and 8L90. 2015 Chevy Silverado 6. 8 speeds in a truck are a joke. 2017 CHEVROLET COLORADO TSBs (484) torque converter information from the field on vehicles that have the condition of a torque converter shudder. I have every right to be here same as you. Engineer reviews have proven that replacing the torque converter does not provide a long-term solution to TCC [torque converter clutch] shudder. It generally occurs at part throttle and light acceleration, between 15 and 50 miles per hour, just before the shift to one of the top gears where the converter reaches "lock-up. [Archive] Page 3 General discussions on the 2016+ Cadillac CTS-V. Check out how it compares to the six-speed automatic. The torque converter is a fluid turbine drive and - like those on its predecessor transmissions, the TH350C, 700R4, 4L60, and 4L80E - features a lock-up pressure plate for direct mechanically coupled driving from the engine crank. 6L Corona, Caadvanced FLOW engineering (aFe Power), an industry leader. For a variety of reasons (torque converter solenoid, worn valves, worn converter) the converter fails and begins contaminating the oil with debris. Shudder Symptoms. If the slip speed is beyond 10 rpm or there is shudder during TCC apply the torque converter should be replaced following the instructions published in Service Information (SI). "Congratulations! Another NHRA record. Transfer Case Shift Concerns Colorado and Canyon Applications 6L50 Updated Pendulum Torque Converter 6L50/80/90 No Reverse After Valve Body Replacement 6L80/90 No 4th, 5th, 6th Gears, Possible DTC P0796 Burnt 2-6 Clutch Delayed Engagement, Slip, Shudder, Clutch Damage Interchange 1-2-3-4/3-5-R Drum Intermittently Neutrals on Launch 8L45/8L90. I have 8K on mine and it is going in next week for a service and recall update. According to TSB (Technical Service Bulletin) 18-NA-355, the latest update addresses “torque converter clutch (TCC) shudder conditions on 8L45 and 8L90” eight-speed automatic transmissions, RPO codes M5N, M5T, M5U, and M5X. Raybestos Powertrain would like to announce the release of a new GPZ Friction Clutch-Pack Module and Steel Clutch-Pack Module for GM 8L90 (M5U) 2015-ON. The TCM monitors the torque converter fluid temperature (hotter then sump oil) to control lockup strategy. GM 8L45 and 8L90 automatic transmissions allegedly shudder, jerk, hesitate and shift hard. International Lubricants, Inc. I understand how other areas of my warranty could be null, however this is a known and common issue with the 8L90 transmission and has nothing to do with. A torque converter shudder is a brief shake or shudder in the vehicle when internal clutches apply inside the torque converter. The transmission on a vehicle has a number of different sensors that affect the way it performs, including the speed sensor and a sensor that monitors the transmission temperature to help prevent. Once the pressure has decreased to some point (about 29 at 70 mph), the torque converter unlocks. (though the lawsuit only covers certain models/years equipped with 8L45 and 8L90 transmissions the torque converter design defect also exists in the 6L45 back to 2013 and 2014. We've been having a ton of complaints with torque converter shudder on the 8L90 trans. Re: Torque Converter Shudder Aug 15 2019, 1:36pm I had planned on a road trip with the dog up to Nashville but now wondering if I should wait until I get this fixed. Vibrations not identified as shudder should be further investigated using the "Vehicle Vibration Diagnosis in SI as a starting point. The housing of the torque converter is bolted to the flywheel of the engine, so it turns at whatever speed the engine is running at. The number one Street/Strip Converter Company in the industry. A revised service procedure will be released in Q1 of 2019. Vibrations not identified as TCC Shudder should be further investigated using the Vehicle Vibration Diagnosis in SI as a starting point. The problem is believed to center on the transmission, torque converter or both. 3 V8, 8-Spd, 3. I just picked mine up at the dealership earlier this week from being repaired. Engineer reviews have proven that replacing the torque converter does not provide a long-term solution to TCC shudder. A new transmission fluid exchange procedure and new formula of Mobil 1 Synthetic LV ATF HP transmission fluid is being released to address torque converter shudder on 8L45 and 8L90 applications. However, in some cases, the shudder, fish bite, chuggle, surge or vibration is caused by something other than the torque converter clutch. I just got my Camaro back from the shop after they fixed my torque converter. Select the navigation view you prefer when narrowing your search. That's pathetic. or 8l90 regular production option. All have service bulletins related to them. These vehicles may have a condition in which transmission calibration allows a higher than target energy input to the torque converter clutch (TCC) under certain conditions. Torque converter shudder fells like a slight to heavy vibration in the transmission, and is usually accompanied by an interruption in power transfer. Find Mobil 1 Synthetic LV ATF HP 124715 and get Free Shipping on Orders Over $99 at Summit Racing! Mobil 1 Synthetic LV ATF HP is an advanced full synthetic automatic transmission fluid formulated from synthetic base oils and an advanced additive system. Think about time spent in top gear with torque converter locked up on a full size truck with some load in or behind it - how much higher can this. Find 2017 Camaro technical service bulletins here. Specializing in vehicles equipped with the 6L80/90 transmission, the 8L90 transmission, and the 6T70 transmission. Correction Vehicles that are presented with TCC shudder should have the appropriate fluid exchange procedure completed. The problem is believed to center on the transmission, torque converter or both. 4 and as best I can tell 4R75E trans. BD 48RE Pressure Controller Prevent torque converter shudder and clutch slippage Prevent torque converter shudder, clutch slippage and transmission shuttle shifting on aFe Transmission Pan aFe Power Releases - Transmission Pan for the 01-12 GM Duramax V8-6. Get 8L45 transmission rebuilding tips, 8L45 troubleshooting help, 8L45 technical service bulletins, 8L45 diagnostics and 8L45 technical information from TRNW. ATI just so happens to be one of the only manufacturers that currently offer a torque converter for our 2017 Camaro SS making it an easy choice. (though the lawsuit only covers certain models/years equipped with 8L45 and 8L90 transmissions the torque converter design defect also exists in the 6L45 back to 2013 and 2014. I understand how other areas of my warranty could be null, however this is a known and common issue with the 8L90 transmission and has nothing to do with. The complaint says it causes undue friction, causing hydraulic systems and gears to function improperly and sometimes leaves metal shavings throughout the transmission, leading to costly repairs and replacement of parts or the entire transmission. Diagnosis beyond the customer compliant is not required if vehicle was built prior to production dates indicated above. Specifically, the 18-NA-355 TSB addresses “torque converter clutch (TCC) shudder conditions” for the 8L45 and 8L90 eight-speed automatic transmission, RPO codes M5N, M5T, M5U and M5X. The TCM monitors the torque converter fluid temperature (hotter then sump oil) to control lockup strategy. Since we started using Dexron HP transmission fluid in March of 2017 both in production and for service, we believe we have basically eliminated the shudder. However, in some cases, the shudder, fish bite, chuggle, surge or vibration is caused by something other than the torque converter clutch. It would nice if Cadiilac would get off dead center, admit they produced a 8L90 tranny with a serious flaw and ALL their 2015 6. It was built with a "squashed" torque converter so that it would fit in the same space as the prior 6L series and the converter lockup clutch apparently isn't sufficiently robust to stand up to its environment. Think about time spent in top gear with torque converter locked up on a full size truck with some load in or behind it - how much higher can this. Converters are then pressure tested and dynamically balanced prior to certification and ready for use. Buying Used 2015-2019 Chevrolet Colorado/GMC Canyon: GM's pair continues to hit the right notes with buyers. Also please check out the statistics and reliability analysis of GMC Sierra 1500 based on all problems reported for the Sierra 1500. Tranny Instant Shudder Fixx is a concentrated friction modifier formulated specifically for eliminating torque converter shudder problems instantly. This is the big one. 2017 CHEVROLET COLORADO TSBs (484) torque converter information from the field on vehicles that have the condition of a torque converter shudder. Original equipment transmissions & transfer cases you can trust Tested to meet or exceed GM OE specifications, only Genuine GM Parts offers transmissions and transfer cases designed specifically to fit your exact Chevrolet, Buick, GMC, or Cadillac vehicle. This Torque Converter utilizes Clutch Plates and Steel Plates inside the torque converter similar to a drum inside the transmission. Choose Transmission, Diameter, Stall Speed, and Disks. Based on a faulty torque converter I would have insisted that they flush everything out of the transmission anyway because who knows if the TC was losing material on shudder but the service writer said that is part of the procedure. I have every right to be here same as you. Thus, as usual, GM is doing absolute jack shit to accommodate the owners. GM Shudder Solution. Use GDS 2 or the CH-51450 PicoScope to confirm that the concern is TCC shudder and not a tire/wheel vibration or a driveline vibration, for example. Yes, if you haven't heard by now, the forthcoming Z06 will have a torque-converter-packing, planetary automatic transmission option. The fins that make up the pump of the torque converter are attached to the housing, so they also turn at the same speed as the engine. Truck is black bear tuned so before taking it in I reflashed back to stock and problem is even worse now, possibly because the reflash put trans back in to learn mode. See 2018 Chevrolet Camaro technical service bulletins (TSBs) at TrueDelta, organized by model year and problem area. If the concern is still present with the torque converter clutch disabled (Mode B) or with the torque converter clutch enabled (Mode C, TCC slip speed at zero), the root cause of vibration is NOT shudder. Car problem(s) with the 2015 CHEVROLET CORVETTE. Chevrolet has officially revealed the new 8L90 eight-speed automatic transmission destined for duty in the 2015 Corvette. TCC Shudder and New Mobil 1 Fluid Exchange January 31, 2019 A new transmission fluid exchange procedure and a new formula of Mobil 1 Synthetic LV ATF HP transmission fluid have been released to address torque converter clutch (TCC) shudder conditions on 8L45 and 8L90 8-speed automatic transmissions (RPOs M5N, M5T, M5U, M5X) in some 2015-2017 Escalade, Yukon; 2015-2018 Silverado, Sierra; 2015. Your path: TSB Home >> 2016 >> 2016 Chevrolet >> 2016 Chevrolet Tahoe The following TSB(s) may apply to your 2016 Chevrolet Tahoe. "Congratulations! Another NHRA record. You should deal with it. The torque converter turns the engine's rotational speed into a twisting force to propel your vehicle, and delivers additional gear ratio when driving at highway speeds. General Motors has been hit with a class-action lawsuit on behalf of owners in at least six states who say the automaker's eight-speed transmission that figures in several rear-wheel drive models. If the concern is still present with the torque converter clutch disabled (Mode B) or with the torque converter clutch enabled (Mode C, TCC slip speed at zero), the root cause of vibration is NOT shudder. Many of our customers with the 8 speed have requested the firm and efficient shifting patterns that truck owners have enjoyed on the 6 speed applications and now we've. If the slip speed is beyond 10 rpm or there is shudder during TCC apply the torque converter should be replaced following the instructions published in Service Information (SI). Fifty wrote: It's the torque converter locking and unlocking over and over Both the 8l90 and 8l45 do this via the factory tune. Upgrades Available Here $ 229. I await answers from dealer and GM Cadiilac Customer relations department. This may lead to faster than expected torque converter clutch material wear, and a shudder feeling when the TCC is applied. Since we started using Dexron HP transmission fluid in March of 2017 both in production and for service, we believe we have basically eliminated the shudder. One can watch the TCC line pressure slowly begin to 'leak' down. Summary: This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicles that may have a grind, pop, shudder or bind feeling/noise in the steering column when turning left or right. The shifting from reverse to drive sounds like a different issue and might not be related to the torque converter/fluid/software issue that GM is working on yet. Torque Converter Clutch Shudder and New Mobil 1 Fluid Exchange A new transmission fluid exchange procedure and a new formula of Mobil 1 Synthetic LV ATF HP transmission fluid have been released to address torque converter clutch (TCC) shudder conditions on 8L45 and 8L90 8-speed automatic transmissions (RPOs M5N, M5T, M5U, M5X) in some 2015-2017 Escalade, Yukon; 2015-2018 Silverado, Sierra. This will increase the stall speed approximately 1000 rpm over stock, to around 3000-3200 rpm. World's Best Oils & Filters for 2017 CHEVROLET TRUCKS SILVERADO 1500 PICKUP 5. Cause This condition may be due to Torque Converter Clutch (TCC) Shudder. Free GM 4X4/4X2 W TORQUE CONVERTER. Vibrations not identified as TCC Shudder should be further investigated using the Vehicle Vibration Diagnosis in SI as a starting point. "Specifically, the 18-NA-355 TSB addresses "torque converter clutch (TCC) shudder conditions" for the 8L45 and 8L90 eight-speed automatic transmission" The above quote is from the article referenced in John's post. We recommend using our full synthetic ATF or any popular brand full synthetic ATF. Description. ATI just so happens to be one of the only manufacturers that currently offer a torque converter for our 2017 Camaro SS making it an easy choice. Click on any bold item to see available Sonnax products. Vibrations not identified as TCC Shudder should be further investigated using the Vehicle Vibration Diagnosis in SI as a starting point. Certain Chevrolet, Cadillac and GMC models built between 2015 and 2019 may have a defect in their 8-speed transmissions, according to a class-action lawsuit posted to ClassAction. C7 General Discussion - 8 Speed shudder fix from GM - Good morning. It is the #1 shudder fix used by professionals and provides four times the wear than regular ATF. 5 ltr 4 cylinder mated to a 6L45 with this exact unrepairable torque converter shudder design defect. TRNW members interact on everything from rebuilding tips, diagnostic help, troubleshooting, parts locating, and the art. This bulletin is found in the Cheyenne, Sierra, Silverado Service Manual. I await answers from dealer and GM Cadiilac Customer relations department. http://johnzacharyphotography. claim the automaker's eight-speed automatic transmission houses a major defect. Print part listing. [torque converter clutch] shudder. 6l80etuning. "Specifically, the 18-NA-355 TSB addresses "torque converter clutch (TCC) shudder conditions" for the 8L45 and 8L90 eight-speed automatic transmission" The above quote is from the article referenced in John's post. No shuddering yet at 13,000 but chances are good that it will. It was built with a "squashed" torque converter so that it would fit in the same space as the prior 6L series and the converter lockup clutch apparently isn't sufficiently robust to stand up to its environment. However, in some cases, the shudder, fish bite, chuggle, surge or vibration is caused by something other than the torque converter clutch. With over 30 years of experience we can meet all your demands and exceed expectations!! Yank It & Get Off Quicker. "Specifically, the 18-NA-355 TSB addresses "torque converter clutch (TCC) shudder conditions" for the 8L45 and 8L90 eight-speed automatic transmission" The above quote is from the article referenced in John's post. Affected vehicles include Chevrolet, GMC and Cadillac vehicles, as follows. I await answers from dealer and GM Cadiilac Customer relations department. Checking out GM TechLink this morning I came across the following article anouncing a fix for the Corvette's 8 Speed Auto Shudder. If the concern is still present with the torque converter clutch disabled (Mode B) or with the torque converter clutch enabled (Mode C, TCC slip speed at zero), the root cause of vibration is NOT shudder. HP Series Billet Stator Torque Converter Converter Diameter - 258mm This is a modified factory converter with billet stator. No shuddering yet at 13,000 but chances are good that it will. When selecting a gear using the transmission, it violently shakes, jerks, or goes into a "hard shift. 2015 Cadillac Escalade ESV - 4WD. It doesn't matter if you have a manual or automatic transmission; they both do the same thing. That's pathetic. Buying Used 2015-2019 Chevrolet Colorado/GMC Canyon: GM’s pair continues to hit the right notes with buyers. New gear ratios allow for take-off power and comfortable cruising. C7 General Discussion - 8 Speed shudder fix from GM - Good morning. According to TSB (Technical Service Bulletin) 18-NA-355, the latest update addresses "torque converter clutch (TCC) shudder conditions on 8L45 and 8L90" eight-speed automatic transmissions. Reject of the Month - 04/03/2014 Customer Enthusiasm & Tire ReplacementsBy now most warranty administrators are familiar with the following GWM System Alert:Please be advised that it is a GWM system requirement that the Tire Pre-Repair Authorization (PRA) must be in ACCEPT status. (though the lawsuit only covers certain models/years equipped with 8L45 and 8L90 transmissions the torque converter design defect also exists in the 6L45 back to 2013 and 2014. And it operates far smoother than a double clutch transmission, thanks to the turbine dampers in the 8L90 torque converter. These vehicles may have a condition in which transmission calibration allows a higher than target energy input to the torque converter clutch (TCC) under certain conditions. I took delivery of a 2016 Sierra Denali (5. We specialize in all kinds of swaps, and provide quality Made-in-America precision maching. A new transmission fluid exchange procedure and new formula of Mobil 1 Synthetic LV ATF HP transmission fluid is being released to address torque converter shudder on 8L45 and 8L90 applications. When selecting a gear using the transmission, it violently shakes, jerks, or goes into a "hard shift. The problem occurs because the lock-up clutches in the torque converter fail to lock completely during the change from V8 to V4 mode. The torque converter issue we experienced on this vehicle is a problem that many dealerships have already encountered. http://johnzacharyphotography. A screen print from GDS 2 or the PicoScope showing the TCC shudder event must be attached to the Repair Order hard copy. Also please check out the statistics and reliability analysis of GMC Sierra 1500 based on all problems reported for the Sierra 1500. According to the 83-page lawsuit, the GM 8L90 and 8L45 transmissions found in General Motors vehicles made between 2015 and 2018 are prone to manifesting a significant “shake, shudder, jerk, clunk or ‘hard shift’” when a driver accelerates and the transmission changes gears. See 58 Consumer Reviews, 88 Photos and Full Expert Review of the 2017 GMC Sierra 1500. It had a shudder on lock up that feels like drive over "road hazard ahead lines" we had the 2nd converter in before tearing the. 42) in November and had to take it into the dealer a week later for a transmission issue (coming to a stop the truck would shudder as. PATC performance torque converters are manufactured in-house at our state of the art torque converter shop. com is a website designed to answer all your technical questions involved with Impala tuning, Camaro Tuning, CTS-V Tuning, Corvette Tuning, G8 Tuning, Escalade Tuning, and Truck Tuning. I recently looked at the most recent copy of the TSB for the AFM induced torque converter shudder for the 8L45/8L90 8 speed transmissions (used in everything from compact Cadillacs through full size gas powered trucks and SUVs) which were introduced for model year 2015 and the latest word is they will have a "final" solution sometime in first. Reject of the Month - 04/03/2014 Customer Enthusiasm & Tire ReplacementsBy now most warranty administrators are familiar with the following GWM System Alert:Please be advised that it is a GWM system requirement that the Tire Pre-Repair Authorization (PRA) must be in ACCEPT status. Each TSB record contains data such as the failing part for the vehicle make and model. A new transmission fluid exchange procedure and a new formula of Mobil 1 Synthetic LV ATF HP transmission fluid have been released to address torque converter clutch (TCC) shudder conditions […]. 9 pumps: Early units had abushing in the front pump; in laterunits, the bushing was replacedwith a bearing. Custom Built Vigilante GM Torque Converters For: Impala SS / Turbo Buick / Camaro & Firebird LS1 / Corvette / GTO / Pontiac G8 / Cadillac CTS-V / Trailblazer / 5th Generation Camaro / Silverado Truck / And many more!. “Do NOT replace the torque converter or transmission assembly for this condition. Torque converter shudder is the most common issue with this transmission. Whether you love them or hate them, automatic-equipped machines are the most common, and one area that's sure to create confusion is the torque converter selection process, choosing the wrong. I await answers from dealer and GM Cadiilac Customer relations department. Summary: This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicles that may have a grind, pop, shudder or bind feeling/noise in the steering column when turning left or right. As a starting point for diagnosing all 8L45/8L90 transmission shift conditions, check for DTCs in all modules and address the causes for setting the DTCs. It developed a rumble strip/fish bite type shudder under light throttle in high gear. 6 and Chrysler NAG-1 Transmission are known to have TCC Lockup problems and Torque Converter Shudder Problems. This technical bulletin provides a procedure to flush and drain fluids for the transmission to eliminate a shake and/or shudder during a light throttle acceleration between 40 and 128 km/h (25 and 80 mph) at a steady state. A screen print from GDS 2 or the PicoScope showing the TCC shudder event must be attached to the Repair Order hard copy. The first is about Mercedes722. I just got my Camaro back from the shop after they fixed my torque converter. If the slip speed is beyond 10 rpm or there is shudder during TCC apply the torque converter should be replaced following the instructions published in Service Information (SI). Created by rebuilders, for rebuilders, Sonnax Technical Resources contains hundreds of valuable articles, videos and more to help you find the best solutions to everyday automotive issues. • The friction components used in the 8L90 transmission consist of 5 multiple disc clutches. The torque converter is already primed with fluid and does not need to be removed. Your transmission will arrive with approximately 1-3 quarts of full synthetic ATF in it from testing. Service Update BulletinsN150389 15389 TORQUE CONVERTER CLUTCH (TCC) SHUDDER 05/22/2015 Closed Customer Satisfaction •M5U TRANSMISSION AUTO 8 SPD, 8L90 N/C. This will increase the stall speed approximately 1000 rpm over stock, to around 3000-3200 rpm. Converters are then pressure tested and dynamically balanced prior to certification and ready for use. I took delivery of a 2016 Sierra Denali (5. • The multiple disc clutches deliver 8 forward gear ratios and one reverse gear ratio through the gear sets. It doesn't matter if you have a manual or automatic transmission; they both do the same thing. You should deal with it. A screen print from GDS 2 or the PicoScope showing the TCC shudder event must be attached to the Repair Order hard copy. After all, the torque converter problems require several thousands of miles to be put in on the newest Corvettes and plenty of buyers hardly drive their newest acquisitions. This database includes information received by NHTSA from consumers either directly or as recorded by the Vehicle Safety Hotline. 42) in November and had to take it into the dealer a week later for a transmission issue (coming to a stop the truck would shudder as. Mitch May liked this. The complaint says it causes undue friction, causing hydraulic systems and gears to function improperly and sometimes leaves metal shavings throughout the transmission, leading to costly repairs and replacement of parts or the entire transmission. I wouldn't want to be the test bed for the new 10 speed. GM 8L90 and 8L45 transmission problems have caused a proposed class action lawsuit that alleges the 8-speed transmissions are defective in the following vehicles in California, Illinois, Michigan. World's Best Oils & Filters for 2017 CHEVROLET TRUCKS SILVERADO 1500 PICKUP 5. Specializing in vehicles equipped with the 6L80/90 transmission, the 8L90 transmission, and the 6T70 transmission. As expected, the undersized and high spinning torque converter issues manifest themselves in a shudder and jerky motion the car starts demonstrating, accompanied by fluctuating engine rpms. GM 8L45 and 8L90 automatic transmissions allegedly shudder, jerk, hesitate and shift hard. It doesn't matter if you have a manual or automatic transmission; they both do the same thing. My 2016 Silverado 6. Read 2017 GMC Sierra 1500 Owner Reviews, Expert Reviews, Prices, Specs and Photos. 2 with 8 speed just started the torque converter shudder at 35,000 miles. Upgrades Available Here $ 229. I had a 2013 ATS with a non-turbo base 2. Very often the problem is a torque converter shudder. Click on any bold item to see available Sonnax products. I await answers from dealer and GM Cadiilac Customer relations department. 2015 Chevy Silverado 6. Tech Resources More than Great Products. In fact, I would argue that this is one reason why they love the dual-clutch gearbox - one thing this transmission lets them do, I believe, compared to say a ZF 8-speed torque converter transmission, is to have both a very aggressive first gear and a very very very tall 7th gear (look at a magazine comparo where they listed 'RPM at 60MPH' - the.