Trans tube going bad?
Thread Starter
2nd Gear
Joined: May 2026
Posts: 2
Likes: 0
Trans tube going bad?
Hi everyone. Was taking my c7z out today and noticed a weird faint vibration from stopped to 20 mph. Then noticed this weird sound from the rear. Anybody have any experience on this topic?
Last edited by BreakLoos; May 10, 2026 at 01:24 PM.
Instructor
Joined: Feb 2021
Posts: 162
Likes: 42
Might not be what you want to hear but here goes:
Had a mystery noise in my TT as well on a 10k mile car. Had no idea, checked header fitment, tightened bolts, looked all over the forums. Brought it chevy, quoted me 11k for entire new trans/replacement. Said they were not going to open it up, I just NEEDED an entirely new drivetrain assembly. (again, a 10k mile car). The noise was not as bad as yours, but I would say similar. Just more towards the front end of the vehicle.
Both me and the late model GM shop I brought it to both thought the TT bearing was smoked. Buy the RPM kit, slap it in - everything will be fine. No way getting around dropping the entire trans to do this, so you are really paying for labor. And the entire driveline has to be dropped out on an A8. Well, they drop it out, take everything apart, and there was no obvious culprit to this noise. Bearing was fine, everything looked brand new. Replaced stock bearing with RPM kit since it was already out and that is supposed to be "better than stock", put it back together and now it's perfect.
I would suggest you follow a similar route and do not bother with chevy unless you have a full warranty and want a new trans that you might not need at all. Can't even imagine how long they will have the car if you do this also.
Find a good GM shop local to you and let them go through it. Do not let it turn into something catastrophic by hoping it will go away.
Had a mystery noise in my TT as well on a 10k mile car. Had no idea, checked header fitment, tightened bolts, looked all over the forums. Brought it chevy, quoted me 11k for entire new trans/replacement. Said they were not going to open it up, I just NEEDED an entirely new drivetrain assembly. (again, a 10k mile car). The noise was not as bad as yours, but I would say similar. Just more towards the front end of the vehicle.
Both me and the late model GM shop I brought it to both thought the TT bearing was smoked. Buy the RPM kit, slap it in - everything will be fine. No way getting around dropping the entire trans to do this, so you are really paying for labor. And the entire driveline has to be dropped out on an A8. Well, they drop it out, take everything apart, and there was no obvious culprit to this noise. Bearing was fine, everything looked brand new. Replaced stock bearing with RPM kit since it was already out and that is supposed to be "better than stock", put it back together and now it's perfect.
I would suggest you follow a similar route and do not bother with chevy unless you have a full warranty and want a new trans that you might not need at all. Can't even imagine how long they will have the car if you do this also.
Find a good GM shop local to you and let them go through it. Do not let it turn into something catastrophic by hoping it will go away.
Safety Car
Joined: Dec 2012
Posts: 3,833
Likes: 1,851
From: St. Louis Metro East IL
If you have an automatic transmission follow this procedure for torque tube installation. Otherwise you risk trashing the engine.
Updated Corvette Driveline Support Assembly Replacement Procedure
GL
Ron
Updated Corvette Driveline Support Assembly Replacement Procedure
GL
Ron
Instructor
Joined: Feb 2021
Posts: 162
Likes: 42
That is the kit. And like Ron said, it is crucial that the procedure is followed. Multiple people have killed their engines not following procedure correctly, which is why I suggested a well-known late model GM shop with experience on corvette TTs.
