I bought 2 Yukon gear master install sets (p/n YK D60) as I'm swapping gears again. This is the first install on a D60 (previously 10bolt, 12bolts, 14bolts, and some sterling axles for Fords). My question is why does the kit come with crush sleeves (2 in each kit). I do not remember taking any out (just shims). Also on the top row of the attached pic (L to R) is carrier shims, pinion depth shims then the slinger. The first two items on the second row I don't know what they are. On the right in the middle is the crush sleeves. The bottom row is pinion preload shims, then what I think is the "washer/shim" that goes on after the bearing and just before the yoke (can anyone confirm) then the pinion nut. I'm a$$uming this is a universal kit, but wondering what would use the crush sleeves and what are those two dished discs???????
TIA
TIA