When to change differential fluid
 

So I am just curious how often I should be changing my differential fluid?

RE: When to change differential fluid
 

i dunno how often...i'll figure it out sooner or later. check your rear differential fluid for leaks as well. mine seem to have a bad gasket and will require changing soon.

RE: When to change differential fluid
 

I read that the diff fluid is supposed to be a 'lifetime' fluid, and doesn't need changing (unless it's leaking or something). But I changed mine anyway and felt anoticable difference for the good. Smoother shifts!