Muncie also had a second close-ratio transmission called an M22, which enthusiasts christened Rockcrusher; this was used in performance big-block engines and Corvettes and is a highly sought-after performance transmission today, and is the heavy-duty version of the 2.20 ratio M21 4-speed. Muncie transmission id and ratio guide series gear ratio 1st 2nd 3rd 4th spline input grooves input cluster pin tooth count input tooth count 4th cluster output spline m20 wide ratio 6365 m20 wide ratio 6670 m20 wide ratio 7174 m21 close ratio 6365 m2,Muncie m22 close ratio 10 spline input for sale ontario.
muncie available for purchasing now. Showcasing muncie now! Vintage Car Parts. ... 1969 Chevrolet . 1969 Chevrolet Unstamped Muncie Case. Counter 660 M22 2 Drain Plugs . It's Worn • Guide to Muncie M20, M21, and M22 Four-Speed. GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. The M22 Rock Crusher would come later to accommodate the heavy twist . Muncie M22 4speed 26/32 661 Case 764 Tail All New Inside Profesionally Built A+. ... M20 Muncie Wide Ratio 2.52 661 Case 10 X 27 New Gear Set Rebuilt 1 Year Warranty.