Inspection Procedure 4
INSPECTION PROCEDURE 4: Gear Noise While DrivingDIAGNOSIS
STEP 1. 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: Check the oil leakage from differential carrier, and repair if necessary. Then, refill Hypoid gear oil API classification GL-5 or higher, SAE viscosity Number 90, 80W. Then go to Step 7.
NO: Go to Step 2.
STEP 2. Check the gear engagement.
Q: Is the gear engagement in good condition?
YES: Go to Step 3.
NO: Adjust the drive gear and drive pinion. Then go to Step 6.
STEP 3. Check the drive pinion turning torque.
Q: Is the drive pinion turning torque correct?
YES: Go to Step 4.
NO: Adjust the turning torque. Then go to Step 7.
STEP 4. Check the gear for damage.
Q: Is the gear damaged?
YES: Replace the gear. Then go to Step 7.
NO: Go to Step 5.
STEP 5. 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 6.
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.