[Mark IV]

What's with the stack of washers on the pinion flange? They will not allow correct torque to be held. If the bolts are too long, get the correct ones. They are available form Ford and many suppliers and the correct bolt is called a "place" bolt, you know the ones with the shallow castlelated heads? This allows the bolt to "lock" as the underside of the head is convex and the bolt head deforms slightly to give a locking action to the bolt. And Ford uses copper washers under the pinch nuts that hold the carrier to the axle housing.