hi all, I have the 97 American eagle, with 325 hp Cummins & 6 sp Allison tranny when cruising @ 50 -55 mph @ 15 -1700 rpms we are at 65-70 psi although when we come to a stop @ idle we go down to 20 psi ? any thoughts we have 101'000 miles and everything has been changed ie fluids & filters thanks
