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Authenticity reference

Transmission OW tag and VIN stamp

numbers matching · reported

1968 Oldsmobile Hurst/Olds photographed by SsmIntrigue; used for side-stripe, black-accent, and roofline context. 1968 Oldsmobile 442 Hurst Olds 455

Reference Details

Common issue
A TH400 or Dual-Gate-equipped car lacking OW/68 tag evidence or a transmission case VIN stamp matching the car.
Confidence
reported
Correct value
Turbo-Hydramatic 400 transmission should carry OW coding with 68 production-year indication on the right-side tag, an individual transmission sequential number, and a VIN stamp on the left side using the same division/year/plant/last-six format as the engine block.
Where to check
Transmission tag on the right side of the unit and VIN stamping on the left side of the transmission case.

Cars With This Authenticity Marker

1 linked car page.

Sources & Documentation