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I got my eaton lsd and bearings and im bout to install. will I need any special tools or is this a fairly simple bolt in procedure? 2004 rcsb gu4 rpo from factory.(open diff 3.08's)I had to get the bearings due to the different size on the late model rearends. I would love some install pics. Im gonna keep my gears for now so i dont need to know how to do all that just yet. thanks for any help.
Bolts holding the ring gear on are left handed. You must turn them clockwise, as viewed from the head side, to loosen them. Put thread locker on the clean threads before installing the bolts in the new diff, use carb cleaner to get the oils off the threads. You need a dial indicator to get your .010" ring gear backlash. Get a shim assortment to work the backlash out. Once you get the backlash set you're supposed to put about .004 -.005" more shim on both sides to preload the bearings in the diff. They make a case spreader to help with the final install but most guys just pound the diff in with a heavy soft faced mallet. A set of calipers come in handy to measure the shims as you're trying to figure out your shim thickness. Setting up gears is pretty similar to doing machine work on the engine, if you don't have the right tools you can really mess things up.
check out the guides here...yukon gear
Read EVERYTHING you can before jumping into this. It's not for the faint of heart.
o.k. I only bought the new bearings and races. do i need to get a new crush sleeve and I have decided to go with 4.56's. Will I have to get anything else? a new pinion maybe? or can i just go with the bearings races and a crush sleeve. where do I find shims at ? where do I find a master kit? thanks for all those specs as well.
master install kit is available from Jegs, SummitRacing or 4wheelparts.com. Your ring and pinion should come as a matched set. They get lapped together to work quietly. You cannot mix and match gears, they must come together as a matched set. Master kits will have shims, bearings, races, crush sleeves, marking paste and brush.
I think this should help you out for the install. I included links of other pages that had useful install tips/procedures.
http://bertok.us/agreif/eaton/eatontech.htm
Andrew