ok, so what is my dealer going to tell me today or what do I need to be telling them?
Quote:
Originally Posted by 1LE Red Dragon
From what I heard from my Chevy dealers shop foreman. Who is an EFILive tuner. He says that GM has had the slip percentages in the auto transmissions for sometime before the A8 trans came out. There was no issue with those. So the trans slip percentages to soften up the response can work properly long term without issue. The mechanical issues with this transmission/TC seem to happen with the slip percentages in them. The friction modifiers are supposed to help with the shudder issue, but evidently there are some mechanical differences with SOME of the TC in the A8 transmissions. There tried to change fluids based on findings of failures. The TC can be damaged if it goes long enough with shudder.
So my guess is they tightened up on the tolerances on the TC manufacturing, and changed the fluid as a double fix going forward in 2018. I dont think they changed any slip percentages in the TC tuning. After all, going from past years, the slip percentages have never been a problem, so it is possible to have a shudder free transmission long term with TC slip programmed in.
My guess is the TSB was meant to cover all years up to an including MY18. Just in case there happen to be some leftover issues, that they did not expect. Its an all encompassing TSB for the A8 trans.
|