Authenticity reference

Transmission code for automatic Stage 1

numbers matching · reported

1971 GSX Stage 1 identification checks for the body pathway, TS engine, and ordering records 1971 Buick GSX Stage 1

Reference Details

Common issue: Incorrect TH400 unit from a standard 455 or other Buick application.
Confidence: reported
Correct value: 1971 455 GS Stage 1 Turbo 400 codes BB or OW are listed in Buick transmission-code reference.
Where to check: Turbo 400 transmission identification tag/stamp; compare with build documents.

1 linked car page.

1971 Buick

GSX package on 1971 Buick GS, with Stage 1 455 selected.