kthaxton
TDR MEMBER
With TH on it should not shift into 6th until 65+ MPH.
There are too many variables to determine when a trans should and would shift up. Speed is only one of them.*
*with the caveat...I do not own an Aisin, so assuming they work like pretty much any other trans I've ever used, load, throttle pressure, speed etc are all factors used by the trans to determine when to shift....not just mph.