Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Driveline System Balance Adjustment (Using EVA): Notes
This procedure is designed to fine-tune the balance of a propeller shaft while it is mounted in the vehicle. Small amounts of residual imbalance which could be present in other related driveline system components could be compensated for as a result of performing this procedure. The end result of properly fine-tuning a propeller shaft balance may be either a significant reduction or an elimination of a vibration disturbance that is related to the first-order rotation of a propeller shaft.
Fine-tuning the balance of a propeller shaft can aid in achieving a more balanced total driveline system.
Tools Required
- J 38792-A Electronic Vibration Analyzer 2. See Special Tools and Equipment .
- J 38792-20 20-Foot Timing Light Power Cord Extension. See Special Tools and Equipment .
- J 38792-25 Inductive Pickup Timing Light, or equivalent. See Special Tools and Equipment .
- J 38792-27 6-Foot EVA Power Cord Extension. See Special Tools and Equipment .
NO RELATED
Use the Manual With the Right Hardware
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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.