Brian, I got a hellava deal and got used ones from diff whack daddy, 4.56 gears for the rear and a front diff with 4.56 and a detroit EZlocker for $400, also purchased an axle for $250, so I have $650 and done no installing. I figure the gears will cost you between $150-200 per axle if you go Drivetrain direct, plus about $60 for each axle for a master install kit, plus labor, I have been quoted myself at shops and seeing other guys around here at about $1000 for the total job. Unless Kampy is at your service, setting up gears is not for the timid and is costly if done wrong, I luckily have Matt(not IL Mr. Fixit, but WI Mr. Fixit) to set my gears and do the swap.