well the whine I have on decel since I swapped in the ford racing gears finally has got to me so I ripped it back apart.I measured the heads of the old and the new pinion and they are exactly the same thats why I used the old shim(0.35) anyway I was looking at the crush sleeve and it doesnt look like it changed at all from when it was new,now in thinking that it didnt crush,even though I measured the preload with an inch lb torque wrench and got within specs.does a used crush sleeve look noticeably different from a new one?cause I was looking at a used one I had laying around and the raised area in the center of the sleeve is allmost gone and the sleeve is noticeably longer.