DATA FOR 4-SPD MANUAL MUNCIE TRANSMISSIONS.
SOURCE: YEAR ONE #R511

GEAR RATIOS

GEAR          M-20        M-21,M-22
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1ST          2.52:1        2.20:1
3RD          1.88:1        1.64:1
4TH          1:1           1:1
REV          2.59:1        2.59:1

**AXLE RATIOS OF 3.73:1 & LOWER (NUMERICALLY HIGHER) CAME WITH CLOSE RATIO
(M-21,M-22) TRANSMISSIONS WHILE AXLE RATIOS OF 3.55:1 & HIGHER (NUMERICALLY 
LOWER) CAME WITH WIDE RATIO TRANSMISSION (M-20). M-22 CAME IN 1970-73 BIG-
BLOCK CARS ALTHOUGH M-22s GO BACK TO 1967 IN CORVETTES.