05-07-2020, 11:48 AM
With a taper joint backing off to the next castellation will always fail; it is fundamental that the taper be kept as tight as is reasonably possible. You can remove a whisker from the back of the nut with emery paper on a surface plate (or plate glass if you don't have a surface plate), just enough for the nut to line up its next castellation. I see no reason not to use a washer if the nut goes on too far, but care is needed if the taper has been lapped. The pinion on the end of the shaft must not be in contact with the inside of the differential housing. If it is you will find bits of silvery looking metal coming out with the oil next time you drin the axle.