Changed out tranny and hooked lines back up to same ports and now tranny will kick shifter out of foward or reverse and all 3 gears. Went back and rechecked line according to numbers on them and all are in the right place.
Have you checked your swivel. If the swivel seals are out its absolutely not gonna stay in gear. You should be able to only change the air/transmission seal.
That is what i am leading to think maybe the problem. Cause it did blow a line on the swivel and afterwards the problem started