This Kryptonite rear transfer case housing is for 2001 - 2007 Chevy/GMC 2500/3500 HD vehicles. To install, first, make sure to swap over the snap ring for the rear bearing, drain, and fill plugs as the housing doesn't come with these parts. Also, note it doesn't include the drain and fill plugs or rear output seal. When using, you'll enjoy its strength and rigidity thanks to the aluminum construction, and you won't have to worry about a pump rub kit. For maintenance, check the housing periodically for any signs of wear or damage. It has a lifetime warranty against pump - rub and a 12 - month warranty for other issues. If you notice any problems within the warranty period, contact the manufacturer for assistance.