Quote:
Originally Posted by Norm Peterson
It's hard to ignore the possibility that GM locked the aftermarket out of the 20+ TCM in the wake of the aftermarket figuring out how to revise the slip tables for the A8 to fix that transmission's shudder.
I mostly agree with gtfoxy, that being locked out of the TCM represents a "take-away" by GM.
Norm
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I wonder if it's due to warranty issues too. Remember the Coyote engines, at least the first few years of them there was issues with cylinders detonating after tunes were installed. I think it was cylinder number 8. That was the reason I never loaded a tune onto mine. I was worried I'd wreck my engine and be stuck with having to buy a new engine
