I'm working on installing a waggy d44 front and isuzu d44 rear in my MJ. I have zip lockers and 488 gears to install. After disassemble I found that the isuzu has a crush sleeve, no oil slingers or oil baffle. Will I be able to install the new gears with the shims? The original pinion looks like the new one other than more teeth. Also the isuzu housing had an O ring seal with RTV on it beside the carrier bearings but it has axle seals at the end of the axle like other rear d44s i've worked on. Anyone ever changed gears on one of these? Thanks