Fluid · Rear DifferentialRear Differentialfor 1992 GMC Sierra 2500 7.4L V8 454 · 4WDFluid TypeACDelco 75W-90 Synthetic Gear OilCapacity2qtOther fluid systems on this vehicleBrake FluidCoolant18 qtEngine Oil8.5 qtFront Differential1.5 qtPower Steering1 qtTransfer Case2.5 qtAutomatic Transmission11.5 qtWasher Fluid3.5 qt📝 Suggest a correction to this fluid spec