I was not having issues back 10 years ago when my Bronco was actually assembled other than leaks which seems to be very common I'm doing a complete frame off so I figured, might as well rebuild it.
It's a fairly easy rebuild. No gears were worn or damaged so basically it was a tear-down, clean, re-bearing, re-gasket/seal and paint operation.
I bought these tools for the job from HF:
https://www.harborfreight.com/bearing-race-and-seal-driver-set-10-piece-63261.html
https://www.harborfreight.com/bearing-separator-and-puller-set-62593.html
I heated most of the bearings in an oven at 325 degrees for 15 minutes and they pretty much fell into place. Others, I used a MAP torch to heat up. I used the cheap transmission clutch press I bought from Amazon for the 4R70W rebuild to press the bearings on the rest of the way. For one of the bearings, I used a 1-1/4" cast iron pipe coupling and nipple to help press it on.
I got the rebuild kit from here:
https://transpartswarehouse.com/bk2...nsfer-case-rebuild-kit-1966-1972-dana-20.html
After finding some scoring and excessive wear on the intermediate shaft, I ordered a "hardened" one from here:
https://thejeepsterman.com/products...nsfer-case-1947-1986-willys-and-jeep-vehicles. It has not arrived yet so I hope it works for the Ford Dana 20.
I also ordered adjustable shift rail detents from JB fab.