04 Yukon rear end

[dadwagon95]

Gotta pay to play, moreso if you aren't careful with your toys.For 4L60E, the question is:
4.10? 4.30? or 4.56? Which one?
You also will want to upgrade your 'limited-slip' differential.
Show your love for it - do your research, and you'll wonder why you waited to improve it.
If you upgrade it properly, you won't have any reasons left to say 'She ain't much'.

I was debating a locker, and definitely leaning towards the 4.56