Quote:
Originally Posted by clinebarger
It is most likely NOT transmission related, It would trip codes if the "Shift Adapts" were maxed out.
Engine performance issues can & will cause the slow progression of later & later shifts, I have fixed similar symptoms with something as simple as a Fuel Filter.
Faulty/Dirty MAF sensor (Torque Rise is calculated by the PCM trough input from the MAF)
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Great info. Makes perfect sense. Will report back if I find something.