TBurton 0 #1 Posted August 21 Hello New to forum Can anyone help with Wheelhorse 312-8 21-12K806. Put transmission in gear heard a loud click sounded like snapping metal now I have no gears. No grinding just a loud crack sound. Where do I start? I can take everything apart but what am I looking for. Is the transmission manuel of the 1988 312-8 good for my 21-12K806 I assume 1982-83 model year? Any info would be greatful. Thanks T Share this post Link to post Share on other sites
nylyon-(Admin) 8,314 #2 Posted August 21 Welcome to the forum. I am no expert, but I would start with the very basics. Is the belt turning when the clutch is disengaged, transmission pulley turning and the input shaft to the transmission turning? It’s possible that the key for the input shaft broke, and the pulley is just spinning freely on the shaft? 2 Share this post Link to post Share on other sites
Ed Kennell 43,081 #3 Posted August 21 to the 7 minutes ago, nylyon said: I would start with the very basics. Like Karl says, make sure the transmission input shaft is actually turning before you go into the transmission. It could also be a broken spring on the belt tensioner pulley. 2 Share this post Link to post Share on other sites
Ed Kennell 43,081 #4 Posted August 21 26 minutes ago, TBurton said: 21-12K806 I assume 1982-83 model year? 21-12K806 is a 1989 model year. 1 Share this post Link to post Share on other sites
stevasaurus 23,453 #5 Posted August 21 I wouldn't start it up to check things just yet. 1st, take off your belt guard and take off your drive belt. Now try turning shafts by hand. 1, Put trans in neutral. Try turning the input pulley counter clock-wise. There is a Woodruff key holding the drive pulley in place. Is that still there. Also, try shifting the hi/low shifter...if the shift fork is broken inside, it will not shift. Do not force anything. If you can shift the hi/low lever, try shifting between the other gears. You may want to jack the rear end off the ground and try turning a wheel to check all the drive gears. 2. Shift through the gears again, and this time spin one of the rear wheels (have someone hold the other wheel from turning). Do this again and switch wheels. You are listening for grinding noises and/or gears locking up. Going through these exercises should pretty much tell us what is wrong. 3. Watch these videos to become familler with the inside of a trans like yours. I read your horse to be a 1989 with a #110996 transmission. Verify that your axles are 1" dia. BTW...Welcome to Red Square. 3 Share this post Link to post Share on other sites
953 nut 62,128 #6 Posted August 21 Make sure your High / Low shifter is not centered between the gears, could have popped out if it was near the edge. 2 Share this post Link to post Share on other sites
oldlineman 1,577 #7 Posted August 23 Does the shifter feel normal maybe the ball broke off the end of the shifter, you can remove the dog point screw and easily check it. Share this post Link to post Share on other sites
