[Jerry Parr WI]

The pinion preload cannot be set with an assembled differential because the drag from the carrier bearings and axle seals add an unknown amount of load. The preload can be set before the pinion is installed. With the bearings assembled hold the bearing race and measure the force to turn the pinion. If you don't have an inch/lb torque wrench the bearing should be snug but you should be able to turn it with your hand.