Whenever you're installing a set of ring-and-pinion gears into your 2010-2012 Ram 2500/3500, you're going to need the right hardware to get them up-and-running. Our selection of gear install kits come with all the necessary shims, bearings, crush sleeves, and other hardware components you'll need to give your Ram's front and rear end the overhaul while you install more aggressive gearing. Check out our excellent selection of Gear Packages. Ram Cummins Fitments: 2010, 2011, 2012 Ram 6.7L Cummins.Submodel Fitments: Tradesman, Laramie, Laramie Longhorn, Big Horn, Limited, Lone Star, Power Wagon.Some exceptions apply, please see individual product pages for specific fitments.