Nice. I'm definitely going truetrac. My poor Yukon hasn't moved in two weeks, as I haven't gotten around to ordering any parts yet. I'm not driving it again until I fix it.
I'm thinking I'll do the install myself. My only hesitation is pinion shims. I don't enjoy taking pinions in and out and in and out. The gears looked perfect to me 100 miles ago, so I'm thinking I'll reuse the gears, and the current pinion shim should then be correct. Does that sound right?