The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Help finding Input Shaft Bearing for 3 speed

raycow · 11-04-2010, 08:48 AM

If you have the HD Muncie 3 speed, the GM designation for that is SM330. It has a 7 bolt side cover and is often confused with the much more common Saginaw (SM326) which it superficially resembles. As you have found out for yourself, its parts do NOT interchange with the Saginaw.

The .040" shim between the thinner bearing and the gear should be a workable fix, but I am surprised that your bearing house can't interchange the NDH number.

Ray

11-04-2010, 08:48 AM	#12
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: Help finding Input Shaft Bearing for 3 speed If you have the HD Muncie 3 speed, the GM designation for that is SM330. It has a 7 bolt side cover and is often confused with the much more common Saginaw (SM326) which it superficially resembles. As you have found out for yourself, its parts do NOT interchange with the Saginaw. The .040" shim between the thinner bearing and the gear should be a workable fix, but I am surprised that your bearing house can't interchange the NDH number. Ray __________________ Live more responsibly. Eat lower on the food chain. Eat vegetarians.