Classic Muscle
Search cars, engines, parts...

Search Classic Muscle

Enter at least two characters to search the archive.

Enter at least two characters to search the archive.

Authenticity reference

Transmission and differential

date correctness · documented

Reference Details

Common issue
A replacement four-speed or Positraction assembly treated as proof of original equipment · 1963 Chevrolet Corvette
Confidence
documented · 1963 Chevrolet Corvette
Correct value
Transmission type, case and date evidence plus differential type and ratio agree with the documented order · 1963 Chevrolet Corvette
Where to check
Transmission case and stamp, shifter/linkage, differential code or tag, housing, half shafts, and records · 1963 Chevrolet Corvette
Common issue
A replacement four-speed or Positraction assembly treated as proof of original equipment · 1964 Chevrolet Corvette
Confidence
documented · 1964 Chevrolet Corvette
Correct value
Transmission type, ratio set, case and date evidence plus differential type and ratio agree with the documented order · 1964 Chevrolet Corvette
Where to check
Transmission case and stamp, shifter and linkage, differential code or tag, housing, half shafts, and records · 1964 Chevrolet Corvette
Common issue
A replacement M20, M22, Powerglide, or Positraction assembly treated as proof of original equipment · 1965 Chevrolet Corvette
Confidence
documented · 1965 Chevrolet Corvette
Correct value
Transmission type, ratio set, case and date evidence plus differential type and ratio agree with the documented order · 1965 Chevrolet Corvette
Where to check
Transmission case and stamp, shifter and linkage, differential code or tag, housing, half shafts, and records · 1965 Chevrolet Corvette
Common issue
Replacement M22, Powerglide, or Positraction assembly treated as proof of original equipment · 1966 Chevrolet Corvette
Confidence
documented · 1966 Chevrolet Corvette
Correct value
Transmission type, case, stamp, date and ratio set plus differential type and ratio agree with the order · 1966 Chevrolet Corvette
Where to check
Transmission, shifter and linkage, differential code or tag, housing, half shafts, and records · 1966 Chevrolet Corvette
Common issue
Replacement M22, Powerglide, or Positraction assembly treated as proof of original equipment · 1967 Chevrolet Corvette
Confidence
documented · 1967 Chevrolet Corvette
Correct value
Transmission type, case, stamp, date and ratio set plus differential type and ratio agree with the order · 1967 Chevrolet Corvette
Where to check
Transmission, shifter and linkage, differential code or tag, housing, half shafts, and records · 1967 Chevrolet Corvette
Common issue
Replacement M22, Turbo Hydra-Matic, or Positraction assembly treated as proof of original equipment · 1968 Chevrolet Corvette
Confidence
documented · 1968 Chevrolet Corvette
Correct value
Transmission type, case, stamp, date and ratio set plus differential type and ratio agree with the order · 1968 Chevrolet Corvette
Where to check
Transmission, shifter and linkage, differential code or tag, housing, half shafts, and records · 1968 Chevrolet Corvette
Common issue
Replacement M22, Turbo Hydra-Matic, or Positraction assembly treated as original-equipment proof · 1969 Chevrolet Corvette
Confidence
documented · 1969 Chevrolet Corvette
Correct value
Transmission type, case, stamp, date and ratio set plus differential type and ratio agree with the order · 1969 Chevrolet Corvette
Where to check
Transmission, shifter and linkage, differential, housing, half shafts, and records · 1969 Chevrolet Corvette
Common issue
Replacement Muncie, M22, automatic, or axle assembly treated as proof of original equipment · 1970 Chevrolet Corvette
Confidence
documented · 1970 Chevrolet Corvette
Correct value
Transmission type, case, stamp, dates, shifter, differential code, ratio, and Positraction evidence agree with the ordered drivetrain · 1970 Chevrolet Corvette
Where to check
Transmission case and stamp, linkage, differential housing and code, half shafts, underbody, and records · 1970 Chevrolet Corvette
Common issue
Replacement M22, automatic, Positraction, or performance gear set treated as original-equipment proof · 1971 Chevrolet Corvette
Confidence
documented · 1971 Chevrolet Corvette
Correct value
Transmission family, case, stamp, date, ratio set, differential type, and axle ratio agree with the engine and air-conditioning combination · 1971 Chevrolet Corvette
Where to check
Transmission, shifter and linkage, differential, housing, half shafts, and records · 1971 Chevrolet Corvette

Cars With This Authenticity Marker

9 linked car pages.

Sources & Documentation