Fluid · Rear Differential
Rear Differential
for 1985 Pontiac Firebird 350ci V8 · RWD
Fluid Type
80W-90 GL-5 with limited slip additive
Spec: API GL-5
Capacity
4.2qt
3.97 L
Drain & Refill
4.2 qt
3.97 L
Change Interval
50,000 mi
80,450 km
Data quality
Book-style estimate
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Notes
GM 8.5" 10-bolt rear axle standard with 350. Typically equipped with limited slip differential requiring friction modifier
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