Nissan 31020-X8006 Automatic Transmission

Drive the vehicle for 15 minutes in stop-and-go traffic to warm the oil in the case, then raise it and secure it on four jackstands. Position a drain pan with at least a 5-pint capacity, along with rags and newspapers, under the car, and use a 1/2-inch drive ratchet wrench with an extension to remove the drain plug located on the underside of the transmission case. If the plug is not too hot, it can often be unscrewed by hand after a few turns; otherwise, use the wrench and let the plug drop into the pan for retrieval once the oil cools. Allow ample time for the oil to drain, and if a magnetic drain plug is present, inspect for metal bits that may indicate excessive wear on gear components. If no magnetic plug is available, check the bottom of the drain pan for any metal debris after the oil has cooled. Once all lubricant has drained, clean the drain plug and reinstall it, tightening to the specified torque. Remove the oil inspection/fill plug on the left side of the transmission and fill it with the appropriate amount and grade of lubricant using a hand pump or syringe until the level reaches the bottom edge of the inspection plug hole. Replace and tighten the filler plug to the specified torque, then remove the jackstands and lower the vehicle. After driving, check the drain and filler plugs for any signs of leakage.