Driveshaft Runout and Balancing

Check

1. NOTE:

Measure and check for the specified maximum value. Install the Dial Indicator Gauge with Holding Fixture. Rotate the driveshaft by turning the axle and measure the runout at the front, center and rear of the driveshaft. Multiple piece driveshaft measure each section at the front, center and rear.

1. If the runout exceeds 1 mm (0.040 in) at the front or center, install a new driveshaft. Use Special Service Tool: 100-002 (TOOL-4201-C) Holding Fixture with Dial Indicator Gauge.

2. If the front and center is within 1 mm (0.040 in) , but the rear runout is not, index-mark the rear runout high point and proceed to step 2.

3. If the runout is within 1 mm (0.040 in) at all points, recheck for vibration at road test speed. If the vibration persists, balance the driveshaft. Refer to Driveshaft Balancing in this procedure.

2. NOTE: Circular pinion flanges can be turned in 90 degree or one-fourth increments. Half-round pinion flanges are limited to 2 positions. CV joint pinion flanges that have 6 bolts, can be turned in 60 degree or one-sixth increments.

Index-mark the driveshaft to the pinion flange. Disconnect the driveshaft and rotate it 180 degrees. Reconnect the driveshaft. Recheck the runout at the rear of the driveshaft.

1. If the runout is still over specification, mark the high point and proceed to Step 3.

2. If the runout is within specification, check for the vibration at the road test speed. If the vibration is still present, balance the driveshaft. Refer to Driveshaft Balancing in this procedure.

3. NOTE:

Excessive driveshaft runout can originate in the driveshaft itself or from the pinion flange. To find