[larrys40]

I grade and evaluate the axles by the critical areas 1st, threads, keyway, taper, gear end, and lastly the seal area. If the seal area on the axle is worn it's really not that big a deal. I would not use an axle just because that is the problem if all other areas ( threads/Keyway,taper,gear) are good. As some have said you can add a spacer before the seal is driven in, use a speedy sleeve, or dress it down. I would not turn down the axle in any way on a lathe to reduce the dimension. In general terms you are not going to leak lube into your brakes..... I've torn down and rebuilt many rear axles (over 150) and really can't say that I've had any one of them oily because of that seal alone.
Pick the best original axle you can taking all the other critical areas into account, key fit, hub fit, threads, gear end.. .and if there's a little wear on it at the seal you can use one of the repairs and also know that with a new neoprene seal it will be OK
Larry Shepard