Strange issue with my 904

In 1, 2, and Drive, the pressure is at about 60 psi at idle and increases to almost 100 with the throttle pressure lever all the way back....... Reverse has about 55 psi at idle and doesn't get much better from there....... I did a Fairbanks shift kit, and I was very meticulous about making sure everything was SUPER clean and even made sure all the balls got put back to where they were supposed to go....... definitely not opposed to dropping the valve body to do an air check!!!! I'm grateful for all the great advice I've gotten from you guys....... Thanks, and I'll post an update as soon as I get it checked out!!!!!