Upgrading or fixing up your Chevy or GMC diesel truck has never been easier. If you have a diesel truck manufactured between 2006-2010, Next Gen Diesel has the parts you require. We offer a selection of aftermarket 2006-2010 Allison transmissions and parts that will give your truck new life. Our options include transmissions and parts compatible with engines with 550-1500 HP. If you want to get the most out of your diesel truck, we recommend the competition model, which is compatible with 1500 HP. If you just want to fix up your current transmission, we offer rebuild kits that give you all the parts you’ll need. Check out our selection of 2006-2010 Allison transmissions and parts today!