Companion Flange Runout Check, Rear Axle

Tools Required:

• Companion Flange Runout Gauge T92L-4851-B
• Clamp Plate T92L-4851-C
• Dial Indicator/Magnetic Base D78P-4201-B

1. Raise the vehicle on a hoist that supports the rear axle (twin post hoist). Refer to Section 00-02.

2. Remove the driveshaft assembly. Refer to Section 05-01.

3. Check the circular companion flange for damage.

4. Position Companion Flange Runout Gauge T92L-4851-B on companion flange pilot.
   
   
   
   

5. Install Clamp Plate T92L-4851-C on runout gauge.
   
   
   
   

6. Align holes in clamp plate with holes in circular companion flange and install bolts. Snug bolts evenly.
   
   
   
   

   NOTE: Refer to Section 05-02A for companion flange Removal and Installation procedures.

    CAUTION: This operation disturbs the pinion bearing preload. Pinion bearing preload must be reset if the pinion nut has been loosened or removed for companion flange re-indexing or replacement.

7. Turn companion flange runout gauge as shown to locate and mark high spot on companion flange. If flange runout exceeds 0.010 inch remove companion flange, re-index 180 degrees on pinion, and re-install. Check runout again. If necessary, rotate companion flange on pinion shaft until an acceptable runout is obtained. If flange runout is still more than 0.010 inch, replace companion flange.
   
   
   
   

8. If excessive runout is still evident after replacement of the companion flange, it will be necessary to replace the ring and pinion gear, and repeat the above checks until runout is within specifications. Install the driveshaft assembly as outlined in Section 05-01. Tighten bolts to 95-130 Nm (70-95 lb-ft).