Pinion Depth & Bearing Preload (1965-72)
If original parts are being reinstalled, use original shim pack and complete installation as described below. If new parts are being installed, proceed as follows:
- Install bearing cups squarely against housing shoulders. Lubricate bearings, install in housing, and assemble suitable tool set (J-6266) as shown in illustration, using gauge plate (J-6266-33) for 1965-67 axles or (J-6266-52) for 1968-72 axles.
- Tighten tool clamp screw to obtain pinion bearing preload of 20 in. lbs. Barrel plunger must be adjusted to rest on lowest step of gauge plate. With barrel plunger away from gauge plate, zero dial indicator, then move plunger across gauge plate and note reading. Subtract indicator reading from mark on pinion gear (Example - mark of 46 is 0.046").NOTE: If no markings are found on shim, it is considered "nominal" and is therefore 0.045".
- Install appropriate shim pack onto pinion shaft, and press rear bearing into place. Install pinion shaft and front bearing into carrier, using a NEW collapsible spacer between bearings. Install seal, pinion flange and nut and tighten nut to remove end play. Continue to tighten nut in small increments until specified preload is obtained.CAUTION: Do not back off nut to obtain proper preload.