Fluid · Rear Differential
Rear Differential
for 1974 GMC C2500 292ci I6 · RWD
Fluid Type
80W-90 or 85W-140 GL-5
Spec: GL-5
Capacity
4.2qt
3.97 L
Drain & Refill
4.2 qt
3.97 L
Change Interval
30,000 mi
48,270 km
Notes
Full-float rear axle. Capacity varies by axle ratio; 4.2 qt typical for 10-bolt
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