I'm looking at machining down my 4.56-up 10.5" G80 carrier. According to East Coast Gear Supply, the offset between thick and thin carriers is 0.355". That section of casting is just over an inch thick, but I can't take 3/8" out without getting close to the holes for the cross pins. I do have quite a bit of adjustability built into the housing. You could probably get by with creative use of the adjusters (might hafta remove the pinion in order to get it assembled, using the guess-and-check method of setting backlash)
The thin section measures 0.485"

My proposal is to remove 0.155" or so from the mounting surface. The remaining 0.200" should be well within the range of the adjusters. And that'll leave 0.330" at the thinnest point of the flange. I also want to avoid bolt-length issues.
@noJeepshere, you said this is doable. Do you have any writeups or personal contacts to verify that this is feasible? I don't really care if the carrier gets ruined in the attempt, but I wanna have my ducks lined up before I tear the truck apart. The more I'm thinking about it, the more it seems like the adjusters should be able to cover the entire 3/8" without needing machining at all. That strip has gotta be 1/2" wide, and the carrier isn't overly close to rubbing the housing...

*note* - https://eastcoastgearsupply.com/files/PDF Files/measuring-carrier-deck-height.pdf
The thin section measures 0.485"
My proposal is to remove 0.155" or so from the mounting surface. The remaining 0.200" should be well within the range of the adjusters. And that'll leave 0.330" at the thinnest point of the flange. I also want to avoid bolt-length issues.
@noJeepshere, you said this is doable. Do you have any writeups or personal contacts to verify that this is feasible? I don't really care if the carrier gets ruined in the attempt, but I wanna have my ducks lined up before I tear the truck apart. The more I'm thinking about it, the more it seems like the adjusters should be able to cover the entire 3/8" without needing machining at all. That strip has gotta be 1/2" wide, and the carrier isn't overly close to rubbing the housing...


*note* - https://eastcoastgearsupply.com/files/PDF Files/measuring-carrier-deck-height.pdf

There's no difference between that and one that has a case and mounts with a bolt. Which IS illegal... So I steered away.



