Limited-slip differential

Years 1971–82 Models 3

Also described as Positive traction differential (RPO)

Documented applications

Full-Size — LeSabre / Electra / Wildcat

1971–1976 Confirmed

Full-size
1977–1982 Confirmed

Full-size

Regal / Century

1973–1977 Confirmed

Century/Regal
1978–1982 Confirmed

Regal, Century

Riviera

1971–1976 Confirmed

Riviera

This page aggregates every documented appearance of G80 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.