I can't find the thread anymore, but I seem to recall that the TC fluid wears out the fastest, rear diff the slowest. I think someone changed their TC fluid every two track weekends.

So for those of you that track often, how frequent are your drivetrain fluid changes?

 

i change my TC fluid every 4 autox's, so thats usually every 2 months

 

Hmm.... considering I had 120 minutes of track time my last track day, I should probably change the TC fluid again

That's inline with what I remember reading, TC fluid every track day. I'll probably do tranny and rear diff every two track days.