Fluid · Manual Transmission
Manual Transmission
for 1975-1986 GMC K2500 4.8L I6 · 4WD
Fluid Type
80W or 80W-90 gear oil
Spec: 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
Notes
SM465 or NP435 4-speed manual transmission
Other fluid systems on this vehicle
A/C Refrigerant
A/C Refrigerant
Brake Fluid
1.2 qt
Brake Fluid
1.2 qt
Coolant
16 qt
Coolant
16 qt
Engine Oil
5 qt
Engine Oil
5 qt
Front Differential
3.8 qt
Power Steering
1.5 qt
Power Steering
1.5 qt
Rear Differential
5.5 qt
Rear Differential
5.5 qt
Transfer Case
3 qt
Automatic Transmission
11 qt
Automatic Transmission
11 qt
Washer Fluid
3 qt
Washer Fluid
3 qt