t15 input sahft removal

guys I'm trying to help a friend get a 1975 cj back on the road. Tranny is a t15 has bad reverse won't stay in. Gotten a new to us t15 from a j- truck has the long input. What has to be done to remove the input shafts so we can swap them? thanks

 

does the counter shaft have to be lowered in the front? to let the input come out?

 

I've rebuilt a T-15 before... but it's been a loooong time. You should be able to do it without taking the whole transmission apart. I recall there is a sliver cut out of the input gear that allows you to remove the input without dropping the cluster. Turn the input and you'll see it.

You're supposed to use a special puller, but you can probably lever/wiggle the front bearing out with the gear. As I recall, there are loose roller bearings in a pocket in the end of the main gear. You'll need to catch all of those somehow - drain the oil first. You may want to transfer the front main bearing from the new transmission onto the shorter gear, considering the problems with the old transmission. I'd use a new bearing, and replace the blocking rings. You'll need to remove and disassemble the main shaft to change the blocking rings. Check the TSM - any '70s TSM will cover the T-15 www.oljeep.com