I just had my diff and rear cushings replaced with the whiteline rear/differential bushing set, since I had the dreaded "leak" from my rear diff after 75K.

Interesting by-product:
I used to get SLP light come on when WOT after ~ 4-5k RPM occasionally. I have the Vortech V3 Kit on. If I turned off the traction control, then SLP light went away.

BUT

Now after replacing the bushings, no SLP light (knock on wood). Weird, I can't explain why I had it and how it went away.

Happy either way