I did another form of a test: while driving in cruise control this does not happen; say, I am doing 40-45mph, as I mentioned car is pulling nicely, then 4th lockups(or upshifts to 5th?), engine feels a bit bogged down; then at that moment, I set the cruise control on, revs adjust themselves (up)right away!;basically cruise 'tells' the ECM/TCM that gear should stay in 4th for this given load......go figure??? or I set cruise right away at the same speed, w/o waiting for the lockup,.....engine pulls nicely all the time, there is no lockup (or upshift to the 5th) !
Regards
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