833 Assembly Woes...

the #2 post is way i fix trans except, i put input shaft in lathe and sand bearing surface with 220 grit paper, i don't have to heat bearing then, by assembling whole trans with input assembled to main shaft can slide it through case easily, 3,4 slider has to be in 4th gear for it to clear 3rd gear as you slide unit in case I've ran mopar trans for lots of years, used this method always, just food for thought.
On the new rollers you have to slide the last one in from the end in some cases. You can not always lay it inside the input, and push it into place.