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Old 04-12-2021, 08:48 PM   #6
dennislbrooks
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Join Date: Feb 2004
Location: Williamsburg, Ohio
Posts: 1,620
Re: 46 GM 4 speed -- new bearings and seals

Your 3 speed is syncroed in 2nd and 3rd. The 41-46 4 speed has no syncros at all. Starting in 47-67 the SM420 4 speed was used and is syncroed 2,3,and 4. There are threads on here for using it pre 47. You have some newer choices also like a T% out of an s10.
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Last edited by dennislbrooks; 04-12-2021 at 08:51 PM. Reason: words
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