INSPECTION PROCEDURE 2: Noise and Vibration at High Speed: Diagnosis

STEP 1. Check the propeller shaft run-out.
1. Remove the propeller shaft. (Refer to PROPELLER SHAFT .)
2. Measure the propeller shaft runout.
  Limit: 0.5 mm (0.02 inch)
  
  Q: Is the measured value within the limit?
  - YES: Go to Step 2.
  - NO: Replace the propeller shaft. Then go to Step 2.
    
    Fig 1: Measuring Propeller Shaft Runout
    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 2. Retest the system.
Q: Is the abnormal noise eliminated?
- YES: The procedure is complete.
- NO: Recheck from Step 1.