Originally Posted by Clockwork

I have to ask... I've been reading a LOT lately about Tranny software updates/reflashes, adaption resets and valve body flushes/removal to clean thoroughly as I am now experiencing myself more often the "kick" when vehicle shifts from 2 down to 1st and sometimes during a rolling stop then accel from a roll I get the "rear ended" feeling...

I just spoke with a major tranny chain repair manager here and he asked/told me a few things...
Why are the valve bodies becoming dirty? the fluid is too dark from friction materials or something in the fluid is gunking up the valve body... then a valve body cleaning will clean the current problems out but WHY is it getting dirty in the first place is the question he proposed to me... he said the big picture here is not valve bodies being dirty but what is wearing down to cause dirty in the fluid. And as soon as you replace the fluid it will start to dirty right away again. AKA you are just prolonging the inevitable.
Its known that tranny's adapt to driving/time/kms driven (tranny brain adapts because it learns to drive the most optimal way with parts the tranny expects to be wearing over time)
As for people performing the tranny adaption reset he said that the vehicle resets its "learnings" from the drivers behaviour/amount of wear and tear on tranny parts and now the tranny thinks all parts are new and therefore will exert more hydraulic pressure/forces on parts that are in fact worn down (hence dirty fluid and potentially dirtied valve bodies) and the degradation of the tranny parts will be even FASTER now since the tranny has been reset.

So from speaking with him (and I'm not saying he is correct) I have to ask, for people who have done the valve body rebuilds, have you ever noticed symptoms again shortly (within a year or two) after the cleaning performed? If so that confirms the cleaning is just a band-aid to a larger problem (what is causing it to become dirty).
just thinking out loud...