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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 755 (AUTOMATIC TRANSMISSION, 4L60-E/4L65-E (TROUBLESHOOTING))TROUBLESHOOTINGFLEXPLATE/TORQUE CONVERTER VIBRATION TESTISOLATING VIBRATION
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

Isolating Vibration

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Isolating Vibration
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Some engine/transaxle combinations cannot be balanced in this manner due to restricted access or limited clearances between the torque converter bolts and the engine. Ensure that the bolts do not bottom out in the lug nuts or the torque converter cover could be dented and cause internal damage.

To isolate and correct a flywheel or torque converter vibration, separate the torque converter from the flywheel to determine if vibration is in the engine or transmission.

  1. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration.
  2. Turn the engine OFF.
  3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  4. Remove the transmission converter cover bolts and the cover.
  5. Mark the relationship of the converter to the flywheel.
  6. Remove the bolts attaching the converter to the flywheel.
  7. Slide the torque converter away from the flywheel.
  8. Rotate the flywheel and torque converter to inspect for defects or missing balance weights. Refer to Engine Flywheel Cleaning and Inspection in Engine Mechanical - 5.7L.
  9. Lower the vehicle.
  10. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration. Refer to Diagnostic Starting Point - Vibration Diagnosis and Correction in Vibration Diagnosis and Correction.
  11. Turn the engine OFF.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.