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Gear Box Selection For Tertiary Crushing System

The Muncie 4 Speed came in 3 basic models the M-20, M-21 M-22. The Muncie M20 was a wide-ratio transmission and was intended for basic street drive-ability and basically for cruising your car . The first models had a 2.56 1 first gear. The later 1966-1974 units had a 2.52 1 first gear. They are compatible with a GM 3 Series differential.

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