Fluid · Manual Transmission
Manual Transmission
for 1971 Buick GS 455ci V8 · RWD
Fluid Type
Dexron II ATF or 80W-90 GL-4
Spec: Dexron II or API GL-4
Capacity
3.5qt
3.31 L
Drain & Refill
3.5 qt
3.31 L
Change Interval
30,000 mi
48,270 km
Data quality
Book-style estimate
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Notes
Muncie M20/M21 4-speed typically paired with 455 in 1971. Factory allowed Dexron ATF or gear oil