Ramets

How do you discern where the shudder is coming from? Transmission or Torque Tube????????

jwmgr8

Well my 2016 they replaced the Torque Converter and it did not solve the shudder, They did Triple Flush and it went away. GM determined bad fluid.

06MonteSS

Yeah, There are a lot of problems with those 8 speeds.. there's even a class-action lawsuit against GM for all the 8 speed tranny problems... There are several GM technical service bulletins out about tranny issues, for dealers to try certain things to fix it.. There's some about the dealer re-programming the TCM/tranny control module with some new GM TCM programming updates regarding that shudder... There are also some programming updates for other things like tranny slipping, clunking, etc.. Another one is for dealers to drain all the tranny fluid out and replace with new, different tranny fluid...

Oskee

Took my then new 2017 Z06 to the dealer for the shudder. On the test drive as soon as it was placed in manual mode the shudder went away only to return as soon as it was placed back in drive. They did the triple flush only for it to return in 2 years later.
Took it back to the dealer which was a mistake because sitting on the show room floor was a brand new 2019 ZR1.
Guess which C7 I drove home ? Yep the ZR1

Ramets

So, there's no permanent fix??

Tinkertech

Your clutches in the converter may be worn out.
Maybe they didn't use Blue label Mobil 1 ATF.
I'd have it triple flushed again with Mobil 1 Blue label.

Oskee

I was told that whoever did the first transmission flush that it was not done right and did not follow the tsb procedure .

Factoid

Good, so they gave you full trade in value and you walked…err…drove away happy!