Quote:
Originally Posted by WolfpackS2k
Unless you track your vehicle, annual brake fluid (and esp rear diff fluid) changes are highly unnecessary.
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^what he said
Diff has no replacement interval. It is only inspect every 30k and replace as needed. If you only daily then fluid will look almost new at 30k miles (except on your first change, that shit will be gross).
If you track with good fluid you shouldn't need to replace fluid more then once a year basically (unless your pedal gets soft, then bleed and maybe think about new fluid). Otherwise it's every 30k miles.