gm 3 speed manual transmission casting number decoder

The 1969 and later models use a bolt to secure the linkage to the transmission. From left to right are the three basic Muncie input shaft/countershaft combinations. Saginaw 3 speeds were built in both Saginaw, Michigan & Munchie, Indiana. They are notoriously Next, carefully raise the vehicle with a jack. Discussion in '1947-1954' started by Blueflame236, Dec 15, 2012. . The length of the unit can also tell you a few things. Prior to 1967, transmission ID numbers contained the plant prefix code, month and date of production (expressed numerically), and a shift code (D = Day, N = Night). If it has a cast-iron case with an aluminum side cover and tail housing, that will mean you have found a Borg Warner. The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case Identification chart). It also uses the same vacuum modulator as the Turbo 350. //

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