Our aftermarket Duramax Allison 1000 rebuild kits help those who enjoy fixing up their 2011-2019 diesel Chevy and GMC trucks. Next Gen Diesel has rebuild kit options compatible with various transmissions, which includes competition, street, superstock, and overhaul options. For those who want to get the most out of their truck, they should opt for the competition model. This transmission is compatible with engines up to 1500 HP. Each aftermarket Duramax Allison 1000 rebuild kit comes with everything you’ll need to get the job done right. Each component in the kit is built from high-quality materials, so your transmission will work for years to come. Contact us for more information about our rebuild kits today!