Gm transmission shudder. If I drop to 5th.

Gm transmission shudder. Jun 30, 2025 · The 6th U. May 8, 2023 · A General Motors transmission class action lawsuit has been certified, but only for customers in 26 states. Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed Diagnosis Instructions: Use one of the following tests methods to assist in proper diagnosis of TCC shudder. ” It’s that unsettling feeling of the transmission slipping, jerking, or hesitating, and it’s been the subject of a major class-action lawsuit against General Motors. General Motors, alleging defective transmissions. Nov 28, 2019 · Just picked up our 19 Redline from the dealership. Torque convert Jun 15, 2023 · Your Chevy Silverado’s torque converter is responsible for connecting and disconnecting the engine from the transmission, transferring power smoothly. No codes at all are being thrown for the powertrain. The GM TSB called for a complete flush of the Dex VI replacing with the Mobil 1 LV. Right now it's still driveable and Oct 11, 2019 · TCC SHUDDER: TCC related shudder is currently the most common concern with these applications. The Silverado 1500 has the 3. First, some customers report the transmission shuddering frequently. Just developed the dreaded, well known shudder issue on light acceleration. Feb 11, 2023 · If your GM SUV has the 9 speed 9T65 transmission you should trade it while it still is in working condition. Not present Mar 2, 2025 · Some 2024 Chevy Trax owners are reporting a transmission shudder or humming noise while driving. Mar 21, 2023 · The torque converter is a crucial part of the transmission system found in today's vehicles, responsible for transferring power from the engine to the transmission . I have delt with several 8 speed transmissions with the same symptoms but this is the first I'm seeing it with a 10 speed. Vehicle has no DTC's, 17,000 miles. This article delves into the function of the torque converter, its operation, and the causes and symptoms of shuddering. GM 6L80/90, 8L90, & 10L90 Transmission Shudder During Acceleration General Motors has released technical guidance regarding a shudder issue caused by improper transmission fluids in their 6L90, 8L90 and 10L90 transmissions. My mechanic gave us the two options of flushing the transmission or fluid exchange and adding a shudder fix formula or spending $6500 replacing the transmissions all together. this issue started when I had about 97000 miles and has Diagnosis Instructions To ensure TCC Shudder is diagnosed correctly, please drive the following schedule on a smooth road with transmission sump temperature between 50°C (122°F) 3 days ago · Trevor's 2024 Chevy Silverado ZR2 refused to shift at Home Depot. The article details what shudder is, how to test for it, the cause and the prescribed fix. It causes the transmission to shake or tremble weirdly when the vehicle shifts into overdrive or when driving uphill in overdrive. The outcome was that instead of slipping the transmission needs replaced. These issues range from rough shifting and delayed acceleration to dangerous shuddering and lurching, leaving many drivers frustrated and concerned for their safety. Didn’t make a lot of sense to just replace the torque converter on a trans with that many miles. I took it to the dealership several times during the warranty period and explained the transmission hesitation during low speed shifts from 1st to Transmission problems have become a recurring issue for General Motors (GM) vehicles, affecting models equipped with 6-speed, 8-speed, and even the newer 10-speed transmissions. GM’s solution to this problem is lengthy & Note: This procedure should only be completed once per vehicle. Identifying the Cause of Silverado Shudder at Low Speed If your Chevy Silverado is shuddering at low speeds, it’s important to identify the cause of the issue and take action as soon as possible. Be assured that this is a common Chevy Colorado problem with easy fixes. Evaluate vehicle on a smooth road with transmission sump temperature between 122°F (50°C) - 158°F (70°C), engine speed between 1100 - 1500 rpm, and engine torque between 150 - 250 Nm. This problem currently affects 11 different models across 3 different OEM brands for the model years between 2015 and 2022. GM released a recall on their 10-speed automatic transmission. Even if it becomes something you have to address, the fix should be a straightforward and successful one. Sixth Circuit Court of Appeals. In my opinion, these transmissions are junk. Apr 17, 2024 · Purchasers of new and used GM vehicles manufactured between 2015 – 2019 equipped with GM’s 8-speed transmission filed a product defect and consumer protection class action against GM for an alleged… Feb 8, 2019 · C7 General Discussion - 8 Speed shudder fix from GM - Good morning. In order to prevent shudder and harshness caused by the torque Mar 2, 2004 · I have a buddy that owns a 2014 GMC Sierra SLE w/ around 165K (5. However, I noticed a shudder at 50-60 mph. Correction If confirmed to be a TCC shudder and/or Poor TCC Control DEGRADED CONDITION while monitoring performance using scan tool and the fluid condition does not show clutch or hardware damage or water/ coolant contamination, please drain and refill the transmission using DEXRON VI fluid as per SI instructions. Fluid Dec 3, 2020 · General Motors has initiated a pilot program to repair or replace the automatic 9T65 9-speed transmission that is found in a variety of its crossover models. This problem currently affects 11 different models across 3 different OEM brands for the model years between 2015 and 2019. After ~200 miles on the new fluid the slow speed performance of the Transmission was substantially improved. Aug 14, 2019 · The issues with the 8-speed GM transmission are two-fold. Apr 4, 2022 · Lubegard 8-Speed Transmission Shudder Solution! Lubegard • International Lubricants Inc. The dealership swapped out the transmission fluid and it’s been running well ever since. Jan 19, 2024 · General Motors has published multiple technical service bulletins pertaining to torque converter clutch shudder issues in their 8-Speed transmissions. Despite GM’s attempts I learned on another video that poor fluid characteristics cause late model GM transmissions to shudder, whether under load or easy cruising. If engine torque is larger than +- 25 Nm while no gear shift is active, and throttle is relatively constant the issue most likely lies within the engine. Will TCM REPROGRAMMING or a synthetic FLUID ATF change fix this car? Nov 2, 2023 · DIY fixes for Silverado shuddering at low speeds may involve changing the transmission fluid, replacing the filter, or other minor repairs as needed. While GM has addressed some issues through service bulletins, the fundamental design limitations persist in many vehicles. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. Important: For some road conditions, it may be required to apply the brake pedal and throttle simultaneously to stay within desired gear, engine firing mode, engine torque Mar 27, 2024 · I'm happy to finally have identified a fix, and an easy fix at that, for a problem I have had SINCE NEW on my 2017 Acadia All Terrain (now at 115K). My dealer, under warranty, did a multiple fluid flush of the transmission using a revised GM transmission fluid. This article also highlights what to do to eliminate this transmission issue. Today Derek talks about a recent project we've done in our shop on a shuddering transmission in a 2018 Chevy Colorado. A night-ending tow for a brand-new truck. THOSE have a known shudder issue that is torque converter related that is "fixed" normally by a flush (proper flush with a GM machine) with Mobil1 LV HP fluid as well. Jan 20, 2018 · On my 2012 Avalanche with 5. Aug 13, 2019 · The 8-speed GM transmission has often been criticized for exhibiting shuddering and harsh shifts, but a new fluid flush may fix the issue outright. Diagnosis Instructions To ensure TCC Shudder is diagnosed correctly, please drive the following schedule on a smooth road with transmission sump temperature between 122°F (50°C) Feb 16, 2024 · GM transmission issues escalate as a federal court has allowed a class-action lawsuit regarding automatic transmission 8L45 and 8L90. Jun 24, 2025 · Learn the most likely causes of transmission shudder, how to pinpoint the source, and how much it's going to cost to fix. When this process fails, it can lead to torque converter shudder. Diagnosis Instructions To ensure torque converter clutch (TCC) shudder is diagnosed correctly, please drive the following schedule on a smooth road with transmission sump temperature between 50°C (122°F) - 70°C (158°F). If I drop to 5th Sep 4, 2023 · Recently had my local Chevy dealer drain and refill (no flush) my trans fluid two times. Drove approx 120 miles between flushes. Service Procedure From the DT-52263 Transmission Fluid Exchange Kit, remove cooler lines and install DT-52263-1 Block Assembly. 0L/LM2 and the 10 speed transmission/MQB. Any vehicle that returns with suspect shudder should be diagnosed utilizing published diagnostics, GDS, PICO Scope or other diagnostic tools. What Mar 30, 2009 · I have a 1993 Suburban, 1/2 ton 4WD with the 4L60E transmission. Jan 5, 2021 · Is your vehicle trembling and convulsing? Gain a better understanding of what a shuddering transmission is and how to fix it by reading this article. Identifying the root of the problem often involves a process of elimination and careful observation. Jan 4, 2022 · Learn about the shuddering and vibration issues in GM vehicles caused by defective transmissions and torque converters. Nov 16, 2002 · When the shudder problem first arose in the early 8 speeds and GM determined a switch from Dexron VI to the Mobil 1 LV ATF (blue bottle) was the fix. Dec 25, 2024 · A class action lawsuit claims that more than a dozen GM vehicles possess a defective transmission that causes them to shake when when shifting gears, and can cause the transmission to fail prematurely. Mileage at service is 36618 In this video I discuss the symptom of torque converter shudder, give an example of it, and talk about the fixes of torque converter shudder. Unfortunately there are a range of years that several different types of GM vehicles will experience this across their light truck, passenger car, and sports car lines. So the trans would rough shift/slam into those gears and then start to shudder shortly after. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs. GM bulletins are intended for use by professional technicians, NOTa "do-it-yourselfer". Transmission Troubles One of the primary suspects when a vehicle shudders Diagnosis Instructions To ensure torque converter clutch (TCC) shudder is diagnosed correctly, please drive the following schedule on a smooth road with transmission sump temperature between 50°C (122°F) - 70°C (158°F). If you press the brake pedal lightly or shift out of overdrive the shudder will quit. In 4th gear, overdrive, under load the transmission will shudder. Jan 2, 2022 · A GM 8-speed transmission lawsuit alleges several Cadillac, Chevrolet and GMC models are equipped with defective Hydra-Matic 8L90 or Hydra-Matic 8L45 transmissions. Secondly, the shifts are very harsh between first to second, and then second down to first, especially when accelerating and the transmission is upshifting or decelerating and the transmission is downshifting. I took mine to a Buick Dealership to have it serviced. 1. After researching the A8 shudder and potential fixes, I decided to buy 24 quarts of blue label mobile 1 HP ATF LV, a new gasket and filter. There is a TSB out there to flush the trans with new Mobil 1 Synthetic LV ATF HP fluid; which allegedly corrects the issue in the torque converter clutch area if the wear Oct 18, 2022 · Your Chevrolet Colorado’s transmission may be experiencing an occasional or frequent vibration which can be mild or aggressive. If I accelerate or press on the brake pedal, the shudder stops. Generally you can fix it with a simple transmission fluid flush. The GM transmission lawsuit alleges 8L45 and 8L90 8-speed transmissions have defects Mar 29, 2024 · Torque converter shudder isn't a big deal. If a Feb 1, 2023 · FYI, going to the D6 transmission fluid from Redline Oil, or the Transmission fluid that Amsoil calls out for it will fix a lot of the transmission issues. After implementing several fluid revisions, GM’s latest solution (TSB 18-NA-355) is lengthy, complicated, and expensive. Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. Circuit Court of Appeals in Cincinnati has voted to decertify a class action against GM, reversing a Circuit Judge's August 2024 ruling. The GM class action lawsuit involves 8L45 and 8L90 Mar 11, 2025 · A senior United States district judge has rejected GM's motion to dismiss a companion lawsuit to Speerly v. Shudder Test The new service procedure addresses shake and/or shudder conditions during light throttle acceleration between 25 and 80 MPH (40 and 128 KM/H) at a steady speed when the transmission is not shifting gears. Had the snow tires done as well as the shudder checked. Read further to find out what causes the dreaded Chevy Colorado transmission shudder as well as how to get rid of it. Symptoms include shuddering during acceleration or cruising, accompanied by jerks or hesitations during gear shifts, especially when Aug 28, 2018 · On the highway it ran great. It has a TC shudder felt with light acceleration and RPM's low, usually at 1500. Note: Warranty claim reviews indicate that when the torque converter is replaced for shudder that vehicle often returns for additional engine or transmission repairs. Dec 19, 2024 · A General Motors transmission class action lawsuit has taken another turn in court, this time in the U. He cautioned us that it could make it worse. One important bulletin addresses torque converter clutch shudder in 8L45 and 8L90 transmissions. What went wrong and crippled this brand-new ZR2? Here's the full story on the ZR2 and Aug 23, 2024 · Followed by the infamous shudder mostly noticeable at low throttle and low rpm 1200-1600 rpm. If a Jul 3, 2024 · What You Need to Know Torque converter shudder is a common issue in 2019-2021 Chevy Silverado models, caused by the slip/lock pattern in the torque converter. S. These bulletins aim to fix issues like shuddering and shifting problems. It Oct 29, 2024 · GM 8-Speed Transmission Recalls and Service Bulletins GM has issued several service bulletins for their 8-speed transmissions. Dec 5, 2023 · Silverado HD / Sierra HD Shudder and/or Shake- The Fix Customers should take their pickups that fall under this TSB timeframe and VIN range to their dealer for confirmation that the transmission calibration and software is correct. If not, your dealer will reflash a new transmission software and recalibrate the transmission to fix the issue. Aug 30, 2024 · GM has been ordered by a federal appeals court to face the class action lawsuit that alleges the Detroit-based automaker knowingly sold fault transmissions. A transmission fluid exchange was first… GM bulletins are intended for use by professional technicians, NOTa "do-it-yourselfer". 00:00 - Intro00 This service update should be performed on vehicles in dealer inventory only. If a A concentrated friction modifier formulated specifically for eliminating torque converter shudder problems instantly! It is packaged in a uniquely engineered two ounce application tube, LUBEGARD's Instant Shudder Fixx™ is compatible with conventional or synthetic automatic transmission fluids. It appears the problem is Apr 8, 2025 · The GM 6-speed transmission problems represent a significant reliability concern across multiple vehicle models and years. They claim it only affects diesels but I see evidence that suggests otherwise. This . When this component malfunctions, one common issue drivers might encounter is torque converter shudder. We have you covered and then some. 500 rpms. 46K subscribers 18K views 2 years ago Nov 11, 2022 · Read the article for a clearer understanding of what transmission shudder is and what causes it. It’s rarely a single, straightforward cause, but rather a combination of elements that might be at play. Pedal Record a GDS session log and monitor engine speed, transmission input speed and engine torque. Prompt diagnosis and repair are essential to prevent further transmission damage and costly repairs. There was also another code on the invoice. 18YN31866297. This problem currently affects 11 different models across 3 different OEM manufacturers between the model years 2015 and 2019. Checking out GM TechLink this morning I came across the following article anouncing a fix for the Corvette's 8 Speed Auto Shudder . Apr 9, 2021 · If you have a brand new 2021 Chevrolet Silverado, Tahoe, or Suburban – GMC Sierra or Yukon, or Cadillac Escalade, and have a transmission that shifts hard, shudders, surges, or stalls- there might be an incredibly easy fix for your problems. Causes of shuddering can include worn torque converter clutches or the gradual application of the torque converter clutch, which may result in shuddering at varying speeds. Discover affected models and your legal options for compensation. This 2015 with Dec 14, 2023 · The "shudder" that is talked about with the ATS is the 8-speed GM transmission from 2016-2019. In some instances, shudder is fish bite, chuggle, surge or vibration. Jul 15, 2019 · GM Shudder Solution - July 15, 2019 Something doesn’t feel right… If your transmission is shuddering or shuttering, shaking, vibrating, or some other word to describe what is commonly referenced as what “feels like driving over the rumble strips on the side of the highway” – you should keep reading. Since then I notice a minor and intermittent "shudder" when coming to harder stops (an example would be approaching an intersection with yellow light). Jun 3, 2020 · He did not replace the filter and the old ATF; I planned to service the transmission later, after checking that everything works properly. Nov 6, 2023 · 2017 GMC Yukon with 130,000 miles "shudders" between 40-50 MPH primarily when letting off the gas and then accelerating or downshifting. 3l and 6-speed AT, I experience an intermittent shudder between 1,000 and 1. He took it to a transmission shop that did I finally pulled the trigger on a remanufactured transmission from GM with 151k on the odometer of my truck. Road test confirmed the issue. Typically, the shudder will occur during light throttle operation at 20-80 mph (typically 40-50 mph) with the transmission between 122°F – 158°F (50°C – 70°C) operating temperature. Feb 16, 2011 · 18 Chevy Colorado V6/8-sp trans. Mar 15, 2025 · Potential Causes of the Shudder Several factors can contribute to a Chevy Colorado shuddering when accelerating. The torque converter, a critical part that helps transmit power from the engine to the transmission, is often the main reason behind this shaking. Other than that the transmission works fine, I don't notice any slipping. TCM update as well as fluid flush as per bulletin 18-NA-091. GM dealers had to obtain a special machine to perform the flush. There is a shudder under acceleration that starts at 30 mph and will continue to 40 mph were it goes away. 29000 miles. These transmissions suffer from torque converter clutch shudder during acceleration between 25 – 80 mph. Mar 9, 2009 · The TSB & new fluid are being discussed on many GM forumsas you've surmised it is a "new formula of Mobil 1 Synthetic LV ATF HP transmission fluid" to address the lingering shudder issues with the 8L45 & 8L90. I don't think it is a transmission issue as the transmission will shift with no affect on the shudder. 3L w/ 6L80E) that is experiencing pretty bad shudder at lower RPM under load when the torque converter clutch is engaged / locked. Now, GM has outlined what can be done to fix the issue. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. We flushed & replaced the transmission fluid twice before finally consulting Apr 15, 2025 · If you’ve driven a GM vehicle with an 8-speed automatic transmission from the last decade, you might be familiar with the dreaded “Chevy Shake” or “transmission shudder. Sep 5, 2025 · It took multiple trips to the dealership to finally identify why this Chevy Silverado had a shudder. May 29, 2025 · I have an unresolved issue with this vehicle. Important: For some road conditions, it may be required to apply the brake pedal and throttle simultaneously to stay within desired gear, engine firing mode, engine torque Mar 14, 2025 · Some 2024 Buick Envista owners are reporting unusual noises or transmission shuddering issues, and now, GM has outlined how to diagnose and fix these issues. I was told off the record that the 2018 Enclave has This 2017 Chevy Traverse surges and SHUDDERS under load when the torque converter is engaged at low rpms, speeds over 30mph. Jun 27, 2022 · General Motors has published multiple technical service bulletins pertaining to torque converter clutch shudder issues in their 8-speed transmissions. I sometimes notice it in lower gears at low speeds, and it happens on the highway for a couple seconds at a time pretty regularly if I'm cruising around 1,500 rpms. Jun 3, 2018 · I have a 2012 traverse. If left Feb 13, 2019 · All GM dealerships should receive the tool kits by the end of March 2019. Sometimes shudder is not caused by the torque converter clutch (TCC). Mar 11, 2025 · A federal judge has ruled that a class action lawsuit against General Motors LLC over its shuddering 8-Speed Automatic Transmissions used in C7 Corvettes can move forward after GM failed to get its motion to dismiss approved. It seems that the "new" transmission shifts good. Apr 11, 2024 · Journey into the depths of transmission shudder causes, uncovering mysteries that could save your vehicle - find out the secrets within! Sep 16, 2023 · Transmission shudder, also known as torque converter shudder, is a problem that can happen in vehicles. General Motors has issued several technical service bulletins pertaining to torque converter clutch shudder issues in two of their 8-Speed transmis-sions; 8L45 & the 8L90. lq r1gdj nlo dc t7uxt6 2nhbh kxsq qvgl ynnihkt 7r1a2f