That pressure should... A] stay about the same going from park to drive B] not be that high at MIN T.V.pressure[idle] C] not bounce around;all assuming the motor is at a decent idle rpm.......so try this first...see if the pressure goes even higher as you increase the engine rpm's,for reference purposes,and they SHOULD NOT,as those #'s are MAX t.v #"s [w.o.t.],not min t.v.#'s that you are reading now ......then try backing off the T.V. cable adjustment, and see if the pressures settle down. It should be in the 75-90 psi range at min T.V.[idle] in P and OD / 3......rev. will be a bit higher, manual 2 and 1 higher yet,about 150 psi. And as the rpm's increase,the psi #'s will go up in P-R-OD and 3......see what happens at that point.......if the pressure doesn't settle down into those #'s, it's possible that the pressure reg. valve in the pump is hanging open.
Last edited by rick 427; 07-17-2012 at 10:30 PM.