Product Description
Gear Kit; 10 Spline, .875" Countershaft, Close Ratio, 2.20 1st Gear
Transtar Aftermarket part number 304580BB for the Muncie M20 / M21 / M22 manual transmission.
Applications
Muncie M20 / M21 / M22 was used in:
- Chevrolet Corvette (1963-1974), RWD
- Chevrolet Chevelle, Malibu, El Camino, Monte Carlo (1970-72) (1964-1974), RWD
- Chevrolet Camaro (1967-1974), RWD
- Chevrolet Chevy II / Nova (1964-1974), RWD
- Chevrolet Impala, Bel Air, Biscayne, Caprice (1963-1970), RWD
- Pontiac GTO, LeMans, Tempest, Firebird / Trans Am, Catalina, Grand Prix (1964-1974), RWD
Check before ordering: many manual transmissions changed parts by year, drive (2WD/4WD) and version. Confirm your unit by its ID tag. Muncie 4-speed: aluminum main case, aluminum extension housing and side cover, 7-bolt side cover, REVERSE lever in the tail/extension housing (Saginaw has reverse in the side cover; BW T-10 has a 9-bolt side cover), all four forward gears synchronized, 4th = 1:1. Model ID: M20 = wide ratio (2.56 1st early / 2.52 later; cluster 29-22-19-17 early or 25-22-19-17), M21 = close ratio 2.20 1st (cluster 27-22-19-17), M22... Call us with your tag and VIN if unsure.
- Part number: 304580BB
- Brand: Transtar Aftermarket
- Shipping: Special order - ships from our supplier, usually 1-2 weeks
Product Videos
Custom Field
Transmission Model(s) Muncie M20 / M21 / M22
Year Range 1963-1974
Manufacturer Part # 304580BB