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Old 05-25-2011, 10:00 PM   #6
Harveybacon
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Join Date: May 2011
Location: Gainesville, FL
Posts: 7
Re: Holding my 3-speed in 3rd gear or pops out

Quote:
Originally Posted by dwcsr View Post
SM 319 is an over drive 3 speed tranny, You should have and SM 318. Popping out of third is most likely cuased by the 2nd/third shift fork being worn or the 2nd third syncro slider being bad or the input shaft bearing being bad. Could be all three. But it does have to come apart to find out.

$400 should get you a complete rebuild provided the broken parts are available and not major components.
Thanks, that sounds right, SM 318 .

Not the fork, I've check it out, pulled off side casing (4-bolts). I don't think the syncro is the case, there's no syncro on first, but I have read threads that explain that issue, pops out when letting OFF the gas. Mine pops out from vibration during acceleration, so I'm still leaning towards bearings. Is input the same as drive shaft? I originally thought that it was the 2/3rd gear being worn, but I don't know if it's the syncro.

Can I fix input bearings without tear down? Thanks!
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