When I turn either direction I hear a low pitch grinding sound coming from the back axel area.
It gets worse the sharper I turn. Seems to be a lot worse when accelerating while turning.
I haven't looked to far into it because I just noticed it but any thoughts? possibly no fluid?
Bad wheel bearings would do that. And they go bad in short order when you run low on Diff fluid.
So I changed the back wheel bearings and inspected the diff condition. Diff looks mint.
I'm still getting a grinding at the rear end when I turn either way. It doesn't seem to do it until I've driven it for a bit and everything in warm.
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Not necessarily. However, since your bearings are good I would also suspect the limited slip clutch packs. They tend to go bad within 100-150k miles, sometimes even less if wrong type of gear oil was used. If they are bad, you need to replace the packs to make the grinding go away. Use spicer replacement parts.
I'd strongly suggest using the Mopar limited slip friction modifier whenever changing gear fluid in the rear. That is, if you have a limited slip rear.
Changing the fluid and adding friction modifier is a cheap and easy thing to try first. Drive it for a while and see how it does. The noise could go away after the new fluid and friction modifier work into the clutches.
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