gcole 36 #1 Posted January 8, 2014 hi guys I got a problem with the trans on my 312. It's popping out of second gear now when under load and sometimes just pulling itself around I know I'm gonna have to split it but I'm looking for whats all in splitting them and what I'm looking for in general to repair Thanks in advance Graham Share this post Link to post Share on other sites
chazm 412 #2 Posted January 8, 2014 If you do a search for trans rebuild, Stevasaurus had a good play by play thread on it I'm sure he'll chime in here shortly Chasm Share this post Link to post Share on other sites
stevasaurus 22,229 #3 Posted January 8, 2014 (edited) Usually, it is 3rd gear that pops out like you say. Not really a hard fix and it is fixable. Could be 2 things...(1) check your shifter, set screw and lock nut...if it is sloppy, it could be not engaging the fork gear all the way. Loosen the lock nut, then bottom out the set screw, then back out the set screw 1/4 turn and then tighten the lock nut. (2) Either the cluster gear is worn where 2nd gear engages, or the 2nd/3rd fork gear is worn, or both. Need to split the trans and find replacements of one or both gears. Racinfool40 (Mike) probably has the gears you would need. Here is a good thread with pictures of putting together an 8 speed. The second link is mine with videos of a 4 speed re-do. The only basic difference between the 4 and 8 speed transmissions is the high/low gearing. Other then that, the videos will show you how to put it back together. Edited January 8, 2014 by stevasaurus 1 Share this post Link to post Share on other sites
