My Parking Brake Will Not Release
My Ultimate Freedom with a Cummins ISL 400 and Allison transmission will not let me release the parking brake. I push it in to release, and it just pops back out. I have noticed that it has been do...
Forum Discussion
I would try turning the governor up till you hit 120. If it will not go up then you will need a new one. Cheap part but make sure you find one that comes on at 90 psi instead of 70. I know in my FT we need more air for the suspension.
