1994 Dolphin pusher w/cummins diesel, Allison 3060 transmission down shifting hard shifts especially from 2nd to 1st. Had transmission serviced with new filters and fluid, all fluids show ok, dealer said needed to drive a while and shifting should get better, now have over 500 miles and down shifts still harsh. Up shifting seems to be ok and in normal range. Did have a problem when fuelling once. wouldn't go in gear, had been driving for a couple of hours and stoped to fuel up and when re-starting, wouldn't go into any gear. I checked the monitor and was flashing and retrieved 2 codes, 45 & 22, I cleared the codes and restarted and went into gears ok and seemed ok. I took the MH out 2 weeks later and it went into default again, cleared codes and off again we went. Any suggestions?