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

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

dznucks · 11-04-2010, 09:27 AM

I actaully have two of the Muncie's and a Saginaw in the shop.

The two muncies were built several years apart and use the exact same bearing. That's why I find it hard to believe its not easier to find the right bearing for this tranny.

11-04-2010, 08:48 AM	#1
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.

11-04-2010, 09:27 AM	#2
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: Help finding Input Shaft Bearing for 3 speed I actaully have two of the Muncie's and a Saginaw in the shop. The two muncies were built several years apart and use the exact same bearing. That's why I find it hard to believe its not easier to find the right bearing for this tranny.



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