Thread: A8 vs A10
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Old 08-20-2018, 06:16 PM   #34
cmitchell17

 
Drives: 17 2SS, 8L90, Cam, Heads, E85
Join Date: Dec 2016
Location: US
Posts: 1,213
It's partly my fault for not logging it when it happeneds. I am wondering how they get the slight engine brake feeling while coasting to a stop, and I guess it is by slipping the torque converter on and off, but you can barely see the RPMs change? Anyway I need to log it and look at the tables to know for sure, problem is I have a 2017 so I can't tune the TCM and can't really afford to not drive for a week while I ship the TCM off, I'm sure an opportunity will come up though.

I think given the limited amount of pressure solenoids and transducers and feedback mechanisms these clutch to clutch transmissions have, it's probably not practical to expect a perfect shift with zero overlap, but I think you may be onto something that the backlash and clunk is being unnecessarily amplified with the TC locked. I know there would be viscous friction when the output drives the input, but I don't think the stator would act the same way in reverse.
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