i picked up a zf5
s-42 tranny from a guy who said is needed synchros. so i got new synchros and all new bearings. took tranny apart and replaced with the parts i got. after all that, put the tranny in my truck and it wont go into 3rd gear. If i put a lot of pressure and hold it in it will somewhat stay in gear but wence i step down on throttle and put alittle load on the tranny it pops out and grinds like crazy! maybe worn sliders or forks??