any time i replace axles on a chrysler FWD, i knock the tone wheels off the axles if they are good, blast 'em, then a fast shot of whatever i have handy in a rattle can. all of the re-man axles i have used come with new tone rings installed [they are plated], so the old ones are not needed for returns. a few taps [be careful] with a brass drift and hammer will remove the old ones. then i have some on hand if needed. several times, i have seen them crack for no apparent reason, such as rust, and i can then replace just the ring without needing the axle. old depression era habits die hard. i learned them from my granpappy.