6t70 hard shift. I already fixed this one. I bought this car last year with a salvage title, so don't know the history. Dec 9, 2013 · However, if ignored they would end up turning into an expensive transmission rebuild. You might notice the transmission hesitating when changing gears or experiencing hard shifts that feel jarring. Providing all external items were addressed, several internal components could cause shift quality concerns that cannot be corrected by relearning the adaptive shift strategy. Just thought I'd post this to help anyone having problems with these transmissions. This TransGo 6T70-A SHIFT KIT® Valve Body Repair Kit fits 2007 to 2013 General Motors vehicles equipped with GEN1 6T70 and 6T75 automatic transmissions. For quite some time I noticed the plug on the front of the TEHCM looked kind of crooked, but it was causing no problems. Car had the problem since I owned it. 6 with the 6t70 transmission. Nov 1, 2023 · A 2015 Chevrolet Equinox equipped with the 3. Below is the dealer writeup of the repairs. The Tranny shifts into Park no problem and it actually engages the car into park (preventing rolling), I can shift into R-N-D-3-2-1 but only my rpms move up as if in neutral. Apr 5, 2022 · Shift quality concerns after a rebuild are among the most common issues with the 6T70 transmission. Feb 19, 2026 · A failing 6T70 transmission rarely fails without warning. Mar 17, 2020 · This is the first time I can read where a 6T70 problem was stopped without an aftermarket tune, so I thought I should share. Nov 20, 2019 · 6T70 Transmission Shift Jump to Latest 8. Sep 23, 2018 · Issue 1) Under light acceleration from a stop, I can feel several short hesitations, best I can tell this occurs in 3rd gear. The 6T70 transmission’s fluid overheats and the fluid loses its viscosity. Dec 17, 2013 · The issue which is a grave concern in the 6T70 transmission is a problem with the planetary gear system. 5K views 4 replies 5 participants last post by kan Jul 7, 2022 B Aug 10, 2025 · 6T70 pressure switch codes, slow engagement and shift flare fix 1 reading Jump to Latest 281 views 1 reply 2 participants last post by Brhatweed Aug 10, 2025 The 6T70 in that vehicle has a common concern for a 2-3 flare in older models due to a weak 3-5-R wave plate that fractures and/or breaks. Let’s look at five of the most common problems with the 6T70 transmission: Transmission Fluid Overheating The transmission fluid overheating was a great concern amongst car owners. Once the planetary gears become faulty, the gear ratios are incorrect. Here are some of the most common problems: Shifting Issues: Many drivers report rough or delayed shifting. Inspect circuits 5981, 5982, 5983 and 5984 for poor or damaged connections between the Instrument Panel Cluster, Body Control Module and the Shift Lever assembly. I Jul 10, 2025 · The 6T70 transmission can exhibit a variety of problems, and being aware of the symptoms can help you catch issues early. Whether you need 6T70 wiring diagram information, 6T70 transmission rebuilders tips, 6T70 technical information, 6T70 diagnostics, 6T70 troubleshooting help, or just answers to your 6T70 transmission rebuilders question, the Transmission Rebuilders Network is the place to go! Sep 5, 2020 · Hard acceleration leaves the converter unlocked right into the 4-5 shift with lots of slippage which is probably why hard acceleration feels like smoother shifts. Not low on Apr 5, 2022 · No forward No reverse No forward or reverse Ties up going forward Ties up going in reverse Hard shifts Stalling Hesitation during acceleration Default actions such as reverse/3rd gear only Default actions such as 2nd gear only Default actions such as 2nd and 4th gear only Any of the issues can occur independently or in combination with other PURPOSE This bulletin provides a service procedure to reprogram the transmission control module (TCM) on certain 2013 model year Cadillac XTS vehicles, equipped with a 6T70 automatic transmission (M7U/M7W). 3-4 upshift would flare, especially Condition/Concern 2015, 2016, or 2017 Acadia, Enclave, or Traverse equipped with a 6T70/75 Transmission Assembly with harsh 1-2 shift, mostly on light throttle with no DTCs present. 6-liter engine and 6T75 transmission has complaints of a delayed engagement into drive and slips in first gear. As for the 3-4 flare after getting hot is likely a worn 4-5-6 accumulator piston bore in the valve body. These vehicles may have a 2-3 or 4-5 upshift harshness, harsh Reverse to Drive shift, coast-down shift bumps, harsh tap shift, and other hard/harsh shift responses. Symptoms such as hard shifting, slipping, warning lights, vibrations, or fluid issues are your vehicle’s way of alerting you to a developing problem. Nov 13, 2022 · I have a 2009 LT 3. Then I got a check engine light and the car wouldnt shift out of first gear, after parking Dec 1, 2022 · My 2011 Impala with the 6T70 tranny all of a sudden today with no prior warnings (such as early gear slipping, difficult shifting, Check Engine Light (s), etc) lost all accelerating power in ALL GEARS. Car has about 177000 miles on it. It feels like the transmission is preparing or starting to shift and then doesn't, 3, 4 or several attempts later it will complete the shift. I did some reading about pulse width modulation/constant slip which seems to be used in this transmission. This issue was mostly corrected by a stronger wave plate design in the 2012 model year, however it should be noted that this issue can still occur. . tfe nao ftb zbi nqk rvo jau qlr oom eer vdo anz dvp gmo ubs