Fluid · Rear Differential
Rear Differential
for 1956 GMC 150 Series 270ci I6 · RWD
Fluid Type
SAE 90 or SAE 80W-90 gear oil
Spec: API GL-4 or GL-5
Capacity
4qt
3.78 L
Drain & Refill
4 qt
3.78 L
Change Interval
12,000 mi
19,308 km
Notes
Heavier-duty rear axle often paired with 270ci engine.
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