I just ordered the bronze bearings sleeves to repair the rear diff. I have 1/2 inch of free space in which to put the two lock collars. The lock collars are 1/2 inch each. I'm short half an inch. I just realized that I can't simply turn down the two halves of the diff on each side because of the stepped down half shafts. That would cause the shaft to go into the housing by that amount and be loose and able to go back and forth. If I did do that when I put the lock collars on which are 1/2 inch wide they would keep the shaft from going in and out but only about one quarter inch would be secured to the 1 inch portion of the shafts. This of course would give half or less of the available clamping force. What if I had the machine shop simply cut me an adapter ring for that quarter inch on each side? If they turned down the diff shaft outputs by 1/4 inch and created that quarter inch ring then I could put lock collars on each side which would clampdown on the 1 inch shaft and the adapter. I cannot think of a better option than that given the situation of being 1/2 inch short. The only other options are cutting new halfshafts (costly), spread the mounting plates which would throw off the angle of the flange bearings, or to move the flanges outward with a spacer between the flanges and the mounting plate which I don't think is a good idea either. Your thoughts?