B4000 SE Cab Plus 4WD V6-4.0L OHV (1997)
Fluid - Differential: Testing and Inspection
Rear
1. Remove the oil supply port plug.
2. The oil level should be 6.35 - 14.28 mm (0.25 - 0.56 inch) below the oil supply port.
3. If the level is below the necessary amount, add oil of the specified type.
4. Tighten the oil supply port plug and tightening to 21 - 40 Nm (15 - 30 ft. lbs.).