I just did both my diffs and got the gears for $300. I paid a local shop (offraod race shop) $100 each diff to install the new gears. I pulled the diffs and reinstalled myself and everything is awesome. So it works out to about $500 for both, not including my time and new seals. Good thing is now I know how to do it and if something breaks on the trail I can fix it, or at least diagnose and do something to get the truck back on the road.