Thanks, I actually found something similar to that chart when I later on searched on Google, but nothing with as much information. Alright, so I've got an H9 3.55 limited slip, so next question is lubes. The chilton manual says to use an 80w90 synthetic while the owners manual says to use 75w140 (I'm guessing dyno). Does it really matter which one of these I use? I've been looking around and can only find the 75w140 in brands that I've never heard of and am weary about putting an unknown brand in my truck. I was told by the guy at O'Reileys that if I used full synthetic that it wouldn't really make that much of a difference...is this true? Which brands do y'all like the most?

My truck is out of warranty, if that makes a difference.