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Authenticity reference

Transmission identification

numbers matching · documented

Reference Details

Common issue
Three-speed manual, wide-ratio four-speed, or regular Turbo Hydra-Matic substituted for W-30 equipment · 1967 Oldsmobile 442 W-30
Confidence
documented · 1967 Oldsmobile 442 W-30
Correct value
M21 close-ratio four-speed or WOG code on the Turbo Hydra-Matic serial-number plate · 1967 Oldsmobile 442 W-30
Where to check
Transmission identification and serial-number plate · 1967 Oldsmobile 442 W-30
Common issue
Non-original transmission installed without disclosure. · 1968 Plymouth Barracuda Formula S 383
Confidence
documented · 1968 Plymouth Barracuda Formula S 383
Correct value
A-833 pad begins PP833; 727 pad begins PK followed by part/date/sequence data. · 1968 Plymouth Barracuda Formula S 383
Where to check
A-833 passenger-side case pad; 727 driver-side pan rail or noted mounting-flange location on some 1968 examples. · 1968 Plymouth Barracuda Formula S 383

Cars With This Authenticity Marker

2 linked car pages.

Sources & Documentation