Clunky transmission
Thread Starter
Racer
Joined: Apr 2018
Posts: 253
Likes: 146
From: Texas
Clunky transmission
Hey guys I have a question for you. I have a 2019 Z06 M7 and during up shifts it's not going in to gear smoothly. It doesn't grind the gears but it does feel like it's catching them a little bit. It makes shifting feel clunky. I've read other post about the M7 not always going fully in to gear and that there is an adjustment that can be made. Mine will do that every now and them but not all the time. I've also seen seen a few post where other's are saying it's normal for this transmission not to be smooth shifting. Does anyone else feel the same way about their car and have you had it looked at. The car has just about 8000 miles on it and I got it in Dec.
Thanks
Thanks
Safety Car
Joined: Jul 2018
Posts: 4,303
Likes: 2,055
From: Margate, FL
My Z51 doesn't like first gear, it hangs up and grinds occasionally. Reverse is sometimes finicky too. Maybe because I live in warm FL but I don't have the 1st-2nd notchy action others often report. I've thought about getting TMODS shifter box. I don't want a short throw I just want smoother engagement.
Safety Car
Joined: Jul 2018
Posts: 4,303
Likes: 2,055
From: Margate, FL
Thread Starter
Racer
Joined: Apr 2018
Posts: 253
Likes: 146
From: Texas
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Thread Starter
Racer
Joined: Apr 2018
Posts: 253
Likes: 146
From: Texas
I don't believe so but I'm not going to lie. It is a possibility. Most of my driving is with work boots on so if I don't readjust my seat, full throw at the end of my reach.
Last edited by jwcfbd; Jun 10, 2020 at 11:30 AM.
Le Mans Master
Joined: Aug 2015
Posts: 6,884
Likes: 2,887
From: Toronto
The Tremec TR6070 is a bit of an unusual transmission regarding the clutch engagement point. Its about half way up. Different than all my previous cars which were closer to the floor. Im used to it now, but it can be easy not to fully disengage the clutch if your not familiar.
Thread Starter
Racer
Joined: Apr 2018
Posts: 253
Likes: 146
From: Texas
Last edited by jwcfbd; Jun 10, 2020 at 01:57 PM.
Thread Starter
Racer
Joined: Apr 2018
Posts: 253
Likes: 146
From: Texas
The Tremec TR6070 is a bit of an unusual transmission regarding the clutch engagement point. Its about half way up. Different than all my previous cars which were closer to the floor. Im used to it now, but it can be easy not to fully disengage the clutch if your not familiar.
Race Director
Joined: Mar 2001
Posts: 19,967
Likes: 6,771
From: Bonneville Salt Flats
Everyones' expectations of manual transmissions different, based on many variables. For example, how much experience do you have with sticks, varied ones? If you've driven nothing but, say... manual Miata's, you will be severely biased about the "roughness" of nearly everything else you drive. Hence, either get a more experienced person to drive your car (unbiased person, not the dealer service-writer who will likely say its fine even if it falls out of the car when he/she shifts it), or drive another M7 yourself. All the best. 
Racer
Joined: Aug 2019
Posts: 310
Likes: 117
If you have a few dollars, install the MGW shifter and change transfluid to Redline D4 ATF. Both items combined made a difference with cold shifting and effort with the shifter. Easy DIY install. Hardest part is trimming the inner boot under the shifter.
Le Mans Master
Joined: Jun 2002
Posts: 6,433
Likes: 3,623
From: Commerce Texas
Yeah, know what you mean.... I had the same problem.... particularly the spacing between 1, 3, 5, 7 -- been driving standard shift cars since 1955..... while I "eventually" got in "synch" with the C7 tranny... I'd go out, get into the Ferrari and be transported to another world.... do you use Rev Match? It helped me....
Burning Brakes
Joined: Oct 2004
Posts: 1,075
Likes: 570
From: Bowmanville, Ontario, Canada
Hey guys I have a question for you. I have a 2019 Z06 M7 and during up shifts it's not going in to gear smoothly. It doesn't grind the gears but it does feel like it's catching them a little bit. It makes shifting feel clunky. I've read other post about the M7 not always going fully in to gear and that there is an adjustment that can be made. Mine will do that every now and them but not all the time. I've also seen seen a few post where other's are saying it's normal for this transmission not to be smooth shifting. Does anyone else feel the same way about their car and have you had it looked at. The car has just about 8000 miles on it and I got it in Dec.
Thanks
Thanks
Thread Starter
Racer
Joined: Apr 2018
Posts: 253
Likes: 146
From: Texas
Yeah, know what you mean.... I had the same problem.... particularly the spacing between 1, 3, 5, 7 -- been driving standard shift cars since 1955..... while I "eventually" got in "synch" with the C7 tranny... I'd go out, get into the Ferrari and be transported to another world.... do you use Rev Match? It helped me....
Race Director
Joined: Apr 2007
Posts: 16,025
Likes: 1,656
From: Toronto, Canada
C7 of the Year - Unmodified Finalist 2021
On my ride to work just now I moved my seat up enough to that the clutch was hard to the floor every time. I was still getting the same shift issues. So it’s not me. Lol I tried different shifting as well. Slamming gears to just letting slide in to gear. Some times it’s was fine other times it would do the same thing. I’ll have them look at the shifter and linkage.
Safety Car
Joined: Apr 2020
Posts: 3,926
Likes: 1,253
From: Northeast
I know what your feeling as my GS is the exact same way. Once in a blue moon it will shift smooth but most times it does not. My C6 GS was very smooth so coming to this was a little disappointing and sort of takes the fun out of driving it a little. I only have 1400 miles on my car but I don't see it getting any better. I am going to change the fluid but I am not holding my my breath.
Instructor
Joined: Jan 2008
Posts: 199
Likes: 92
From: Wynnewood Pennsylvania
I'll agree with various posts, that shifting is smoother when warmed up and at higher rpm's. Even then, shifts are still not as buttery as my NB Miata, but the throws are much shorter/tighter in the Vette, recognizing that I'm moving more substantial parts inside the transmission. Correct observation, too, about clutch engagement points being significantly different. There's a short re-learning whenever I change cars. Also, Corvette Owner's School got me to improve my driving position, sitting much closer to the pedals/wheel. That's helped my clutch work, too.