I need to replace the rear seal on my transmission. I beleive it is a Muncie MM420. The seal is an O ring (about 3-4 inches in diameter) that keeps the fluid from getting out of the tail housing and on the torque tube. Checked several parts houses including large NAPA store and Novaks with no luck.
John, Most of the truck resto places like Chevy Duty, Jim Carters, etc. have a transmission gasket set that includes the gasket your looking for. I'm surprised you had no luck from Novaks, they should have had them.
Ed Fallon In seemlingily endless process of restoring a stock 1953 chev 3100 pickup.
Thanks Ed. Evidently Novaks does not adapt there trans' to torque tube configurations. I checked the two sites you gave me and it appears they do not have any. I sent them an email to confirm.
You need to call Jim Carters. The website and catalog are sometimes a little confusing. Any way you can get us a picture of what you are talking about? If it is just an o-ring, that should be easy to find at Motion Industries. You may need to buy the complete transmission overhaul gasket kit for a 4 speed 1/2 ton it should be complete.
Jim Carter's could not help me along with a strin of other folks that distribute old truck pats so I called Patricks this afternoon. They say that what I need, whichh they have is a Ball Seal Kit. They are sending me the parts I'll let everyone know if this works. Thanks for the suggestions.
Seal kit found at Patricks. The seal I replaced was rubber, the new seal is cork. If you are rebuilding a Muncie SM420 the kit is from FEL-PRO and the number is ES 72843.
