Thread: 4 Speed 101 ????

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Thanks guys, I have been checking for bell housings and have seen a few of the truck's with the clutch fork and slave on the passenger side. Anyone have an idea on how big that hole is in the center of the bell? I can not seem to find any data on this spec.

looks like I have purchased two transmissions ( UuuP's) One is a T-10 Borg Warner looks like a close ratio 4 speed for the early chevys up to about 1965. The other is a Muncie M-20 out of a 1967 Chevelle.

It appears that the only problem, if there is one, is to be sure the center hole in the bell Housing will accept the tranny's input shaft retainer. Trouble is after spending hours looking on this computer I can't find out these deminsions. Here are a couple of pictures of the input shaft retainer on both trannys anyone know this spec? If not thats cool I will have the trannys next week or so and can measure them then, but I would like to aquire all of the parts I can first. First pic is the Muncie so the second must be the BW T-10, and these are pics of the actual transmissions i purchased.

It does appear that the GM bellhousing with the casting # that ends in "621" is big enough for either of these transmissions. And I think that bell housing will accept either an 11" or a 10 1/2" clutch. If I am wrong in this information please clue me in.

Thanks Guys-- Roland