Quote:
Originally Posted by Kenstaroni
If you haven't changed the diff fluid since it was new I'd go ahead and do it. I did mine at about 2500 miles to flush out any break in metal and it was pretty dirty already. Amsoil makes a great 75w-90 gear oil if you don't want to pay the crazy price for the 75w-85 stuff.
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I did mine at 8,000 miles for the same reason and could not believe how dirty it was.