Special Tools

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EL-38792-20 20-Foot Timing Light Power Cord Extension
EL-38792-25 Inductive Pickup Timing Light, or equivalent
EL-38792-A Electronic Vibration Analyzer (EVA) 2
EL-38792-27 6-Foot EVA Power Cord Extension

For equivalent regional tools, refer to Special Tools and Equipment .

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.

NOTE:

The runout of the propeller shaft to be balanced and the runout of the components that the propeller shaft mates to must be within tolerances before an attempt should be made to perform this procedure.

If EL-38792-A electronic vibration analyzer (EVA) 2 is available, use the following procedure, Adjustment Procedure Using EVA. If the EVA 2 is not available, use the second procedure, Adjustment Procedure Without EVA.