No problem, I've rebuilt at least 100 of these and have seen lots of different issues, but the main one is shift fork wear/pad seperation (I have a machine shop weld/machine new pads on the forks), and blockage of oil holes, which is usually the plastic from the shift forks that gets ground up by the gears and makes it's way into the bearings. With no oil getting to the bearings, it also helps feed the synchronizer and the tapered teeth can wear out as well.