Allison slow to shift to fifth ? [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: Allison slow to shift to fifth ?


gmccall
06-01-2004, 12:17 PM
Tranny is slow to shift to 5th sometimes, under normal driving. I may have to increase speed up to 55 or 60 mph to make shift and lock up.


And,...... after a hard run (pedal to floor) to say 80mph and I get out of it....... I see RPMs staying at say 2200 going 60 mph until I feel tranny shift to 5th ?.


Its like tranny wants to stay in a higher range.


Any ideas as to whats happening ? Is this normal with my mods ? (See sig. for mods)


Edited by: gmccall