[jjzepplin]

I guess It may have been mentioned already but what trans do you have? Internal shift type like SM465 or external like Saginaw with shift levers and rods? If internal must be synchros external can be shift linkage adjust and synchros. I like to tear them all the way down and check and replace synchros and bearings. Isn't really all that difficult and no special tools required. Might need to take the mainshaft to get the front main bearing swapped out. My 4speed Saginaw rebuild kit was $80 on ebay. Took 2 hours to rebuild. I did find a massively worn shift fork. Another $20 ebay. My guess is the linkage was way off contributing to the shift fork wear from someone trying to force it into gear. After being frustrated with the shifting issue they pulled it and sold to me. So hard shifting can cause lasting issues that are hard to see from just looking inside.Check your oil when you replace it in a small container for brass particles. This is your synchros going bad. Steel shavings or particles could be a host of things. Either way best pull it and find out for sure.