Sorry to go against the folks here, but a bad syncro will NOT cause a trans to pop out of gear. It can't. Once the trans is in gear (2nd in your case), there is no load on the brass ring. It's just sitting there floating around. The main causes for a trans to pop out of gear is bad gear (taper on syncro teeth), bad slider (taper on syncro teeth), or bad fork (worn thin, not pushing the slider all the way to engage the gear). It can be any, or all, or a combination of all three. A bad (worn) rear bearing retainer (usually found on Toyota, Nissan, etc,) will also cause it, but the 833 doesn't use one. A severely bad output bearing will cause it to pop out also, usually only 1st and 3rd.
Let it begin.
Russ.
