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Part profile

M21 close-ratio four-speed

transmission · Chevrolet

Three Transmission Paths reference for the 1974 Chevrolet Camaro Z28 1974 Chevrolet Camaro Z28

Why It Matters

The optional close-ratio four-speed used a 2.20:1 first gear.

Also Known As

1974 Z28 M21

Used On

1 linked car page.

two-door sport coupe

1974 Chevrolet Camaro Z28

L82 350, 245 net hp

Related Parts

wheel

15x7 Z28 wheels and F60-15 tires

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1974 Camaro bucket-seat interior

body

1974 Camaro sport-coupe body

engine

1974 Chevrolet L82 350 V8

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1974 Z28 exterior identification

axle

8.5-inch Positraction rear axle

transmission

M20 wide-ratio four-speed

brake

Power front-disc and rear-drum brakes

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Rochester Quadrajet four-barrel

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suspension

Z28 special performance suspension

Source Trail

Chevrolet Motor Division, General Motors 1974 Chevrolet Camaro Vehicle Information Kit

Teufert.net Camaro Reference 1974 Camaro data

Chevy-Camaro.com 1974 Camaro trim-tag decoding

MotorTrend A Look Back at a Road Test for a 1974 Camaro Z28

Hagerty 1974 Chevrolet Camaro Z/28 valuation guide

Bring a Trailer 1974 Chevrolet Camaro Z28 4-Speed sold September 1, 2025

Wikimedia Commons 1974 Chevrolet Camaro Coupe Z28 at Centropolis Laval

Wikimedia Commons 1974 Camaro Z28 front view