I rebuilt my 904 (non-lock up) in my 75 Swinger myself. First time ever rebuilding a transmission (searching this forum and buying an ATSG manual sure did make things easier)!!!! The issue I'm having with the trans is when it's cold, it does not want to go into reverse, slips badly (all other gears are great!!).... When the trans is warmed up, reverse works just fine, no slipping at all...... I checked line pressures and reverse is low, but 1, 2, and Drive are all fine...... Anybody have any ideas what it might be????
