[supereal]

The correct Ford rear axle nuts are a specially hardened thick items that are to placed over a correct thick washer. No attempts to chase the threads should be attempted. If the threads are damaged, the axle must be replaced, or it is likely the end will separate and the wheel will fall off on the road. Don't put anything on the axel taper. It must be clean and dry to seat properly. We tighten the nuts with a breaker bar wrench with a pipe extension on the handle. Retighten after running the car around a hundred miles. Here is a good tip: mark the end of axle with a line to show where the cotter hole is with a file. If, after tightening, the hole doesn't line up with the slots in the nut, back off only to the next slot.