Recall C8 GM trannies late 2023-2024
05-06-2024, 06:35 PM
#21
Le Mans Master
Mine does this too. I accelerate, usually pretty heavy in "My Mode" remove my foot off the throttle when the revolutions are high and it just stays there. Usually takes a while but it will eventually shift up dropping the revs. I always thought it was due to the mode I set my transmission to and it responding with being more aggressive. Can anyone else share your knowledge or experience on this? I have a January built 2024 Z51.
The following 3 users liked this post by RKCRLR:
05-06-2024, 08:03 PM
#22
Intermediate
05-12-2024, 12:52 PM
#24
Racer
Page 202 of the downloadable PDF version of the 2024 OM.
05-13-2024, 07:40 AM
#25
Mine does this too. I accelerate, usually pretty heavy in "My Mode" remove my foot off the throttle when the revolutions are high and it just stays there. Usually takes a while but it will eventually shift up dropping the revs. I always thought it was due to the mode I set my transmission to and it responding with being more aggressive. Can anyone else share your knowledge or experience on this? I have a January built 2024 Z51.
Performance Shift
Performance Transmission
Driver Influenced Gear Selection
The description says this happens in any Driver Mode, "however the aggressiveness of the transmission response will increase between Tour, Sport, and Track modes respectively." The setting that actually affects it is the engine/shift setting. So, you are correct that it is affected by your mode selections, but it does happen to some extent in any mode or setting of the engine/shift parameter.
06-02-2024, 09:10 PM
#26
That is what my dealer said as well. Luckily, my trans is good thus far. My problem is I installed headers, bigger throttle body and carbon fiber intake manifold before I knew about the tranny issues. I'm sure they will say those would cause a tranny problem. 
and Id have to pay 16K out of pocket
and Id have to pay 16K out of pocket
06-07-2024, 09:00 PM
#27
My 2023, picked up in Oct of 2022, is within the affected range. I drive 100% in manual mode and paddle shift. I have never experienced any issues from 2-8 gears up or down. However, every once in a blue moon, when the car shifts down to 1st, when at a stop light, it lurches when I go to take off when the light is green. Downshifting to 1st manually was so hit or miss, that I just let the car take over from 2nd to 1st. The lurch has happened maybe once or twice in the last 3 months. I’m on track to hit 7500 miles this Sept and will get the tranny service then. Like others, I’ll just wait for GM to tell me I’m affected for the tranny replacement.
06-08-2024, 07:48 AM
#28
My 2023, picked up in Oct of 2022, is within the affected range. I drive 100% in manual mode and paddle shift. I have never experienced any issues from 2-8 gears up or down. However, every once in a blue moon, when the car shifts down to 1st, when at a stop light, it lurches when I go to take off when the light is green. Downshifting to 1st manually was so hit or miss, that I just let the car take over from 2nd to 1st. The lurch has happened maybe once or twice in the last 3 months. I’m on track to hit 7500 miles this Sept and will get the tranny service then. Like others, I’ll just wait for GM to tell me I’m affected for the tranny replacement.
I use paddle shifters too however NEVER manually shift all the way down to 1st.
06-08-2024, 10:53 AM
#29
My build was among the last of ‘23 in September and no letters to me yet, if it is affected. My 6-month ownership window ended in March and still haven’t received my 500,000 points yet either, so confidence is low regarding timely notification of vehicle defects.
