also, being a '92, there's a good chance most of that tranny is original...meaning there could be a lot of worn parts and contributing factors.
This was the case with mine a couple years ago...mine started jumping outa gear due to a broken snap ring...but once I pulled it apart, I found several worn gears, worn and bent forks, worn shift drum....so instead of just replacing a few things, I replaced the entire tranny and gear change mechanism, because I didn't want to mate any new parts to any old parts.
I really doubt you'll need to go to that extreme, but be sure to check everything really well....if you don't have a service manual, get one...as it'll give you all the wear tolerance specs on all the tranny parts.