Inspection Procedure 6
INSPECTION PROCEDURE 6: Gear Noise While DrivingDIAGNOSIS
STEP 1.Check the gear engagement.
Q: Is the gear engagement in good condition?
YES: Go to Step 2.
NO: Adjust the drive gear and drive pinion. Then go to Step 6.
STEP 2.Check the drive pinion turning torque.
Q: Is the drive pinion turning torque correct?
YES: Go to Step 3.
NO: Adjust the turning torque. Then go to Step 7.
STEP 3.Check the gear for damage.
Q: Is the gear damaged?
YES: Replace the gear. Then go to Step 7.
NO: Go to Step 4.
STEP 4.Check for the engagement of foreign material.
Q: Is the foreign material found?
YES: Remove the foreign material and then inspect. If necessary, replace the part. Then go to Step 7.
NO: Go to Step 5.
STEP 5.Check the oil level.
Remove the filler plug and check the gear oil level.
Q: Is the gear oil level more than 8 mm (0.3 inch) below the bottom of the filler plug hole?
YES: Refill Hypoid gear oil API classification GL-5 or higher, SAE viscosity Number 90, 80W. Then go to Step 7.
NO: There is no action to be taken.
STEP 6.Check symptoms.
Q: Is the abnormal noise eliminated?
YES: Replace the drive gear and drive pinion. Then go to Step 7.
NO: This diagnosis complete.
STEP 7. Check symptoms.
Q: Is the abnormal noise eliminated?
YES: Repeat to Step 1.
NO: This diagnosis complete.