chevy 6 speed automatic transmission problems

Maybe there’s a Ford Ranger or F150 in my future. We are also looking for an experienced forum moderator to join our team. I don’t get the shuddering that many complain about but get a hesitation upon a part-throttle at low speeds after a stop or slowing down to a near stop. Sorry for the omission. You maybe correct about software update on relearn. Thanks for the catch. I believe it is cheaper to change the transmission fluid than to fix the problem. Fingers crossed that a few more days of driving will iron out all the kinks. I am armed with more information than prior to drop off. If that’s truly the case, then it’s likely a torque converter won’t resolve the issue, unless the torque converter is bad. Most posts of successful shift resolution (including myself) have all been via aftermarket tuning: disabling AFM and changing the shift points. A lot of the companies have issues like this. Much more then the Ford/Dodge. The first 1-2 shift of the day will have a slight bump sensation. So, you should be able to ask your dealer to do the current iteration of the TSB to get the new fluid in there, and that may well help you. Hopefully take the next step to replace the torque converter and flush again. the truck went in shop day before turkey day. 2007-2013 Chevrolet Silverado HD – 2007-2013 GMC Sierra HD This time, only fluid change. The Allison® 10-speed automatic transmission is designed specifically for heavy-duty trucks to deliver more strength, improved efficiency and a smoother driving experience than before. Now they tell me I’ll need to pay because its over 60K miles and I didn’t complain when I had it in for service. The shop said my downship is actually dangerous its drops like 3 or 4 gears instantly. I took my ’17 Colorado in a couple weeks ago they said bring it back in a month so I don’t know what is going to happen, I just hope it keeps going and the shuddering doesn’t get much worse and leave me stranded. In one case it was even a leaking tranny cooler in the Audi that put moisture into the fluid. The Chevrolet Silverado 2500 is engineered to handle almost anything, but transmission problems can stop it dead in its tracks. 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. If no battery voltage is found at the fuse, the ignition switch will need to be replaced. This was the same powertrain as offered in the Corolla. I am at a stand still. Speaking of which, I think GMA is the only ones reporting on this. It seems really confusing, and I think GM is scratching their heads as much as everyone else is. General Motors needs to spend money to make money, paraphrasing Bob Lutz. Gm does not stand behind there product’s And they wonder why people buy foreign cars, The writer of the article needs to be made aware that it’s “Mobil 1”, not “Mobile 1.”. Now, GM Authority has learned that there’s a new fix that seems to be alleviating the eight-speed’s shifting woes outright. I don’t know Tom, if it was just the software I’m not sure that they would do the fluid triple-flush, which does seem to help some people. The four-door sedan listed for $7,435, a rather stiff tariff by Chevrolet standards. This is obviously a big deal for owners struggling with their vehicle’s eight-speed. None of them can touch the CTS for a solid, planted, quiet and comfortable ride. o Uses such as found in taxi, police or delivery service We would love for you to enjoy our content, we've worked hard on providing it. I got rid of my 2019 Canyon tonight. The TSB for the issue further states that if the complete fluid exchange to the Mobile One product does not permanently fix the issue then the next step would be to replace the torque converter. I have a shudder worse than before after about 2500 miles. Learned to live with that. I have a Edge Performance CTS2 monitor on this truck. get them to check the transmission fluid, mine had metal shavings. Got their usual response of can’t duplicate the problem and that is the way it shifts. After installing the new one in the reverse order, the ECU/TCM may have to be reprogrammed in order to recognize the new transmission. Bought a Ram. Right now allot of unemployment but the dow is hitting records. Waiting on word of issues and work to be done. So, that is the next step for them to look at. NO…it’s 5 years 60k for power-train. Told Darrell Waltrip GMC to do a complete service, everything. For this reason I encourage people to not buy anything with the 8 speed and to flush and dump anything they currently have. This would make the shuddering go away for a while, but then it would come back, because of the old fluid. The newest fluid seems to have corrected the issues with the shudder almost immediately. It’s obvious now that there’s something else wrong besides the fluid. Unfortunately, this is how we pay the bills and our authors. 2018 Colorado lt. OK thanks for sharing…. gear range. They most probably adjusted the shifting as the shuddering was caused by not shifting down going uphill and therefore the engine was running on too low RPM. Hands down the best handling and riding car I’ve ever owned. They also have felt confident enough to make this the factory default fluid. I feel like the transmission “struggles” slightly between first and second. Alas, typos happen. TSB 14308 – Leak at transmission cooler It doesn’t mean every torque converter will be glazed. Asked what GM would do extend warranty, replace transmission, new vehicle he could not speculate and would need to contact service and call me later. The remedy? This will allow you to get a much longer service life, and the warrantees are usually much better too. Dealer said I had to drive it for 500 miles first, he couldn’t tell me when I can get a new transmission. Dam right I dumped it a year ago with Amsoil ATF on my 17 High Country 6.2L and vibration gone immediately but now its banking/clunking like it was rear ended. Temperature swings between day and night could be harsh on these delicate machines. I will mention that on my next oil change. I’ll never buy another one. Unfortunately the truck was shy that day and there was no hard shifts (there was subtle 1-2 & 2-1 shifts). The heavy duty internal components are rated to withstand engines with up to 440 lb … Another possible symptom includes the following DTCs: P0729, P0731, P0732, P0733, P0734, P0735 & P0736 I have a 2018 Cadillac CTS AWD. You see, the service manager drives it to and from work as the test. Jonathan is an automotive journalist based out of Southern California. I brought up all the concerns with what i’ve been having and the research i’ve done with these forums and videos, I asked them if they could check the transmission fluid. I blame many of our vehicle anomalies on the GOVNORMINT. It had had ALL its `shots’, ALL the flashings and ALL the software updates were, well, up-to-date. The reality is most people never change their fluids in their vehicles. Problem – Trucks equipped with the 6-speed 6L80 or 6L90 transmission may experience no forward or reverse engagement, or slipping between the gears. I’m guessing the psuedo-clutch plates behind stator/impeller. Jeremiah, another new fluid? Valve Body Issues I concluded that after-warranty repairs for a Toyota will be expensive due to import taxes, thinking the parts are not made here (I could be wrong). However, Chevrolet Silverado 2500 transmission problems do still happen. I’d be buying a foreign vehicle next time. Like all modern GM … You just need to present the vehicle to the dealer and they will replace the fluid and it will resolve the issues in nearly all models, and if you are one of the many that can no longer get this covered under GM ” non ” warranty, or it does not fix your ” known faulty ” issue. It is not cheap either. Thanks GMC. GM Repaid the loan- you & GM are on your own-. This is my 2nd flush with less than 15,000 miles. But I read on the internet that flushing fluid is bad and you should never do it as it will kill the transmission. They are under orders not to replace the torque converter. I feel bad for the people that do and to make matters worse GM isn’t resolving it going on 6 years. We’ve covered the problems of the eight-speed GM transmission on numerous occasions. ”. It’s like going to two different McDonald’s and getting different results in experience, quality, and customer service. Wait, a dealer was dishonest? No 3rd or 4th Gear Give it some miles Jake..It will come back, sorry. They tiold me NO on a buy back. The only reason they agreed so fast is due to all of the complaints. My initial transmission flush was also night and day difference……..for awhile. I can’t quantify that, but the point is that if you brought it in pretty much right away, your TC should still be ok. but please alert me if you ever comment again on this forum as I may need to give my dog another walk. Maybe not the answer your looking for. Same with my 2015 Silverado High country…fluid changed due to shuddering…now less than a year later gears are slamming in downshift. Who’s to know. 2012 Chevy Silverado HD – 2012 GMC Sierra HD Gears Slipping I have a 16 Yukon that’s had two transmissions replaced in a year and a 19 Silverado that’s been at the dealer fifteen times in a year and a half for horrible shifting that they say is normal. It’s likely they’ll discontinue flushes soon as well, if the valve body and/ or valve body cover is proved to be the issue. You my man are legendary! Sure, could you recommend a specific model that can haul my 24′ camper 350 miles to the Adirondacks? Many of us are working class people that paid big $$$$$ for our vehicles and now we feel like we are pissing it away because GM can’t figure out how to make an automatic transmission that they probably have been manufacturing in some fashion since the 1940’s. What does repaying the loan have to do with the fact that they are putting out “crap” and then don’t have technicians smart enough to fix the problem? Pricing varies by model. A 2021 Ram might be in my future. Dealer did the flush, new fluid, and replaced internal transmission harness. Jon, I have done the service and it took a transmission I really thought was working well and improved it much. Said I needed to flush and refill with new type fluid, which would resolve the problem. The 2015 Chevrolet Silverado 1500 has 15 problems reported for transmission shifts poorly. GM is now blaming in vibration on my Borla exhaust. I first noticed shudder about 15K miles, took it in immediately, and it was flushed with the old fluid (2017). Is this from GM or a puppet at a dealership? As far as AFM i deleted that with Trifecta tune or you can do it with Range Technology, Thanks…still under warranty here so I’ll go this route. Please explain GMs example of ” severe duty ”, Just wondering if driving to work at the office, and buying groceries is ” severe duty “. The heavy duty internal components are rated to withstand engines with up to 440 lb-ft of torque, and a GVWR of up to 18,000 lbs. Shuddering was infrequently, but the past few months, has gotten worst (happening every time I drive it), so I basically stopped driving the car for the past 2 months for concern about damaging parts/etc., until I could get it in for service. It’s possible that the wires for the TCC solenoid and pressure control solenoid have become frayed on a body seam. I am not trying to defend them, it is always about the money, from the company point of view if they drag this out long enough, their hope is people will quit complaining about it. I can report my own experience as I felt like I really had no shudder compared to what most reported. Would like to know what it takes to get GM to replace mine. I noticed sport mode increased throttle response and modified shift points. Some dealers did the flush with fluid other than mobile one and the issue will return. Two transmissions were available: a Tremec T56 six-speed manual or a 4L65E four-speed automatic. I got a new transmission at 43000kms. I was ok and agree with everything you said until you got to this point. please refer to your specifi c vehicle Owner’s Manual for any exceptions. My two year old Colorado not even worth half . A lot of the companies have issues like this. now the service writer is a cool guy, and i’m sure he was just trying to put me in a better mood with a joke, but i really don’t think they are joking. I have done the service and it took a transmission I really thought was working well and improved it much. New 2018 Colorado V6 and right away I noticed the shuddering when going uphill on cruise control. I didn’t know I had a problem. 1999-2004 Cadillac Escalade, Escalade EXT, Escalade ESV – 1996-1999 Chevrolet 1500 Series Extended Cab Short Box Pickup (Old Style) – 1996-1999 Chevrolet 1500 Series Regular Cab Pickup and Utility Models (Old Style) – 1999-2002 Chevrolet Silverado Extended Cab Short Box (New Style) – 1999-2004 Chevrolet Silverado 1500 Series Regular Cab (New Style) – 2000-2004 Chevrolet 1500 Series Avalanche, Suburban and Tahoe – 2001-2004 Chevrolet Silverado 2500/3500 Series Regular Cab with Long Bed or Extended Cab (New Style) – 2001-2004 Chevrolet Silverado 2500 series crew cab, short box (New style) – 1996-1999 GMC 1500 series extended cab short box (Old style) – 1996-1999 GMC 1500 series regular cab pickup and utility models (Old Style) – 1999-2002 GMC Sierra extended cab short box (New style) – 1999-2004 GMC 1500 series Yukon, Yukon XL – 2000-2004 GMC Sierra 2500/3500 series regular cab with long bed or extended cab (New style) – 2001-2004 GMC Sierra 2500 Series Crew Cab, Short Box (New Style) – 2003-2005 HUMMER H2 Solution B: Buy a Rebuilt Chevy Silverado 2500 HD Transmission. There is an instant difference in the feel of the transmission shift after changing just the 4 quarts in the pan. Say it ain’t so! No, GM will lose many, many loyal customers over this mess. That’s the problem when you switch transmission fluids at the same time you come out with a totally new transmission. And I would hope GM stands behind ” all ” the 8 speeds out there with ” this ” trouble weather under warranty or not ! I’ve always been a Ford guy. This article has an extremely interesting take on the issue. This is why there are a wide range of experiences from owners. I think I will take advantage of that if the numbers are right. Cruising along and sounded like plastic gear striping till I give it gas. I was then told GM said no to the torque converter and the computer didn’t register the problem. Hoping this problem is resolved! I jerked me back and forth. ” In one case it was even a leaking tranny cooler in the Audi that put moisture into the fluid. Just had mine done, they told me it was only covered under the basic warranty which I still have. Possibly. Let us know the year, mileage and problem you’re having as well as any trouble (OBD) codes you’ve found. Back on May 20, 2017 I made a GMC Dealer purchase of a Certified Used 2015 Sierra 1500 Denali 6.2L, 8-speed which had recently returned from a GM lease. After their inspection the recommendation was to turn it over to them for a senior tech to use as his daily driver with a real-time monitor ported up to it. Customers that complain of shuddering and harsh shifting characteristics in the 8-speed GM transmissions are recommended for a trans fluid flush. You must be a GM Executive by the way you are defending them. This is the third time the fluid has been flushed on my transmission and I’ve pretty much had it with this truck. Change fluid, replaced torque converter…did no good. I coincidentally brought my Sierra in for this problem 2 weeks ago after dealing with this annoyance for 2.5 years. All of the customer satisfaction letters do just this, push a GM ” known faulty issue ” out of the warranty period on to the next owner to deal with. Whining, Clunking or Humming After looking at the Ford Ranger I chose the Colorado because I liked it more. First, some customers report the transmission shuddering frequently. Struggle is not the perfect word, but it seems like the fluid is heavier and you can tell. I also have an ’18 Sierra 6.2L 8-speed w/ 22k. ”. Do it. -OEM 6 Speed 6L80E Automatic Transmission. For sure really! This engine makes 425+ horsepower and includes everything you see pictured including all accessories computer ECM computer, LS3 intake manifold, MAF, throttle body, 6l80 6 speed automatic transmission… Had my GMC Yukon in for service at 59K, tried for 50 but was busy. GM has been moving manufacturing to Mexico allot in recent years. Had mine in 4 times in one year for same problem. I just got a 2017 gmc canyon denali used at 47621 miles and started to here that shudder noise in the back here and their not so bad tho .think the transmission fluid flush will fix it? That’s a load of BS take it to dealer that will fix it many will. In order to replace your Silverado 2500 transmission, the old one will have to be disconnected from the driveshaft, engine and frame. I was just now informed it will cost me $573 to flush the transmission because the bumper-to-bumper warranty has expired and they say the power train warranty doesn’t apply. I spoke with him recently and he claims nothing is different in the way the transmission is built. Directed to bring it back in; they had it for 2 + weeks. Lack of Response I love the truck anyway! If they did how did they fix it and if not why is that? 2008 Chevy Silverado HD – 2008 GMC Sierra HD Besides, that has nothing to do with the hard clunk shifting between 1st and 2nd gear. The flush did work for a while. Meant to say “ many things about the car I find amazing and love”. I inquired about replacing the torque converter and the dealer told me that they have never replaced one before. What’s worse is that it’s not just the hard shifts. did the shudder stopped at all? This eight speed transmission is a POS This eight speed transmission is a POS..Trying to go through Aegean buyback it’s been a total nightmare for months they only call me back on Fridays at 4:30 or 5 o’clock and they always say they’re working the issue delay delay delay dealership says their hands are tied because it’s still under warranty I will never buy a GM product again I’m seriously pissed. They had me do the fluid chance twice in the same year, and I can confirm they are under orders not to replace anything. I don’t know why with so me complaining they don’t do a total recall on the transmission and torque converter and be done with it. Issaquah Wa Chevy said they would not fix the issue. Anthony, now that they replaced the torque converter, and 10 months later .. has the replacement fixed the problem? EPA-estimated MPG city/highway: 26/34. It’s just unfortunately not working for some. I returned home. I even noted that fact when I dropped it off. I sent this to service department in case they could not replicate it. I’m wondering for all that have the hard shift and shudder on the 8 speed. You would think after all these years of this problem they would have said hey we better fix this. It was a known problem and they still installed it in the Colorado. Fluid swap was the previous year with Amsoil ATF. How did you AFM? Yea that was my problem also! Oldsmobile 84-91 sounds like the same nightmare to me, You are absolutely right, I’ve owned 12 new gm vehicle, but this is my last, they had to know they were bad, and to call it. Certain 2012 Chevrolet Silverado 2500HD / 2012 Chevrolet Silverado 3500HD and 2012 GMC Sierra 2500HD / 2012 GMC Sierra 3500HD trucks equipped with the Allison 1000 6-speed automatic transmission (MW7), may have been built with an incorrect transmission thrust bearing. HELP!! My GMC dealer who 100% acknowledged my hard shifts in previous visits, is stating they absolutely were not told to flush 8 speeds unless they meet a very specific criteria (severe lag engaging from neutral to drive). Will my GMC dealership pay for this flush? Didn’t help though…58000 miles, A GM Owner’s Manual will guide you to what is needed and when. Or did those other dealers get all the information, and are deciding to charge people while they’re within warranty anyway? Dodge appears to way overly priced. Replacement Allison 1000 Transmission: Why would all vehicles fall under warranty ? They reset the computer to learn mode when they flush so folks think it has helped with harsh shifts. Do not be distracted by alarmest like LongtimeGMmoaner who really have little clue and just do nothing but troll and complain about eveything. Mine didn’t after the flush with Amsoil ATF and a relearn. Maybe i should have leased it. Well aware. Figuring out how to default the truck’s MAGNETIC RIDE CONTROL to off to QUICKLY check if I’ve got yet ANOTHER Bridgestone Dueler tire with steel belts beginning to come apart…. Problem: The torque converters were glazed, that were replaced. Purchasing an electronic vehicle is not an answer. They don’t care. I however have been in to the dealer 3 times complaining of the hard shifts, clunking, etc. Problem – Diesel powered 2008 Chevrolet Silverado 2500HD / 2008 Chevrolet Silverado 3500HD and 2008 GMC Sierra 2500HD / 2008 GMC Sierra 3500HD trucks equipped with the Allison 1000 6-speed automatic transmission (RPO MW7), may have a condition in which increased transmission oil cooling circuit pressure may cause transmission fluid to weep or leak. The problem could also be caused by a mechanical issue inside of the four-wheel-drive transfer case like a worn bushing. I don’t have any engine shudder at high speeds but just hard shifts between 1, 2, and 3. Cost 700 dollars but people are swearing it works. You just need to present the vehicle to the dealer and they will replace the fluid and it will resolve the issues in nearl all models. However, most mechanics will use an OE master rebuild kit, which takes the transmission back to its stock form, and usually does not address any of the factory design flaws. Affected vehicles include Chevrolet, GMC and Cadillac vehicles, as follows. With that said if you have more than 60K miles by now you are high milage under these conditions and odds are you were towing or saw heavy duty use where it should be changed earlier. Up for sale is a used complete L99/AT Drop Out pulled from a 2010 Camaro SS. A very slow leak will burn out your trans in a commercial use situation very quickly, so ask for the paper towel treatment and look at it close. Most of my cars were standard shift. The last thing is a different vehicle. I dont want to get the fluid changed if it will make it worse shortly after… atleast with covid I dont commute to work so I drive alot less. We are currently looking for experienced automotive journalists and editors to join our team. 2001-2006 Chevrolet Silverado 2500HD – 2001-2006 GMC Sierra 2500HD This will be my last GM EVER!!!!! in the Netherlands garages put 1lt/qt of motor oil for € 35,- on the bill, so I got mad, told them what I think of that and now they don;t want me as a customer anymore; well I invested in my own lift and tools and do maintenance myself and if it gets more difficult I go to a neighbor who is a car mechanic his whole life and pay € 25,- an hour instead of € 95,-. I do love the 6.2 power and the looks of my sierra Denali but everything I hear about on hear Just pisses me off more and more. The moisture in the fluids has been an issue with many companies. ” This is covered on the 60k 5 year warranty so everyone should be covered by time and if it is higher miles they are due for service anyways.”. The ZF S650 was used by Ford starting in 1999 an GM started using this six speed in 2001. Ahd fluid done at tranny shop and shudder and downshift going down hills is worse. I am have also heard something about a TCM re-flash for hard shifts, would that be considered under warranty as well? GM published a TSB calling for a fluid flush with Mobil 1 Synthetic LV ATF HP fluid. Best advice, everyone needs to be on social media warning all of the GM 8spd product, dont let up. My 2016 Yukon xl goes in Tuesday for fluid change, what is the cost? Intermittent harsh shifting – Chevrolet Silverado 2500 HD 4L60E Mischief about the car I find amazing and love. The GM 8L45 eight-speed automatic transmission. For the most part GM is slowly moving newer generation cars/trucks to the 10 speed. The TSB info is there. NADA ( blue book) has degraded trucks with the 8 speed so bad . Plus, the available Duramax® 6.6L Turbo-Diesel V8 generates 445 horsepower and 910 lb.-ft. of torque. Stuttering returned thus my taken it back. Transmission oil change does nothing And that warranty might not cover you if you are traveling and need work done at the local transmission repair shop. Please advise oh 35000 on my rig, I took my 2018 Colorado to dealer because of these same issues.They said that they could’nt duplicate the symptoms and sent me away.No flush and new fluid, I’d be going to another dealer. Next up? I had the fluid change done in my 2017 GMC Canyon in May of this year (2019) and my MPG’s are up slightly. But, seems to only during accelleration and upshifting during torque converter operation. TSB 06-07-30-013 – Shudder in 6th gear – Allison 1000 Transmission  What transmission is in the Chevy Traverse? The federal government eventually sold the stock when it became evident that is was a loosing proposition to hold it any longer, resulting in huge losses. Want to see your GM ride featured on GM Authority? At this point, I don’t think GM can fix this turkey trans and I think they have given up. Was told they drove 120 miles with computer attached and they could not recreate issue. I was been having the same issues with transmission shudder/vibration on my 2016 Silverado 1500 w/8-speed since I purchased it used one year ago. So that the GM customer feels as if GM took care of the ” known faulty part ” that GM sold the GM customer ! The 2011–2016 Ford Fiesta and the 2012–2016 Focus have a dual-clutch automatic transmission that is the subject of a class-action lawsuit and many individual lawsuits. I appreciate the effort with the fluid change. in fact the first time I got out of my car to check the rear. They are known for acting like they haven’t heard of well documented issues as if nobody ever complained about it before. The tranny shudder has returned at 56,000 and is in the shop having the fluid changed to the newest version as of 9/28/20. Still they put it into the truck anyways. Problem – A number of diagnostic trouble codes, including P0776, P0796, P2714 and P2723, can be caused by a pressure leak at the end of the clutch regulating valve. 4L60E Two-Piece Case Identification: 1996-1999 . Tons of leaking problems reported coming from all over the place. When the TSB had the triple flush, I believe that was done with the old fluid. 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. Appointment on Monday, The flush did not work, the dealer changed the valve body as well, still no change to the shutter or hard shifting . And they will just do the minimum warranty stuff until the warranties expire. Maybe we should all start changing oil every evening, then again in the morning in response to possible accumulated moisture overnight. Couldn’t agree more spent extra hard earned money on a brand new 2017 CR two because I believed that it was a GM truck where they didn’t cut corners and spared no expense boy was I wrong in the truck is an absolute piece of crap In short 46,000 miles six trips in the dealership service be for the same transmission problem still not fixed GM customer service refusing to help dealership says their hands are tied because it’s still under warranty I will never buy GM again. Hit the nail on the head Dana. Leaking axle seals, cooling translines leaking, leaking from the transmission case bolts, from the torque converter seal, and more. The shudder came back less than a week after the torque converter was replaced, I will be taking the truck today again and they will keep it to “fix it “. My dealer made me pay for mine, my 2017 is a little over 2 years old but 78,xxx miles so out of warranty. I certainly can relate, having been a GM person most of my 50 years of driving and having 3 GM vehicles (Silverado, Cadillac CTS and C7 Stingray) at the same time with transmission problems. Severe duty is whatever you want it to mean. Class action lawsuit is that n the works. 2018 Silverado High Country 1500 6.2L which has had the occasional hard 1-2 2-1 shift issue, as soon as I felt the shudder for the first time at 14,000 miles and immediately took it into the dealer and they did TSB 18-NA-355 triple Flush Then of course they sell used from all makes, including certified Preowned from BUICK, Chevrolet, and GMC. The filter is not defective and this is not a filter quality issue. TSB 01-04-17-004B – Clunk, bump or squawk when vehicle comes to a stop, or when it is accelerating from a complete stop – 4WD/AWD vehicles with a one-piece propeller/drive shaft only GM pretty much just tells their customers that is normal behavior. Tuesday morning and today, I have recreated the issue in route to work (33 mile drive one way). Just had the latest trans flud changed and for now working better than when new. Lemon law? As far as gaining customers from another manufacturer on the other end of losing them, who the heck would jump over to a GM product after reading about all of the problems. Warranty is covering it but now instead of just the cost of a fluid change they have a new drivetrain to own up to. I then installed a Dipstick for a Camaro that I bought from eBay seller blueracer1976 Solution – Rebuild or replace the valve body.

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