Upgrading the power of your diesel truck engine, or replacing the transmission, has never been easier. Next Gen Diesel has Allison 1000 transmissions compatible with Chevy and GMC diesel trucks manufactured between 2011-2019. We offer multiple models, so it’s easy to find one that matches your needs. Choose between our Allison 1000 transmissions in either street, superstock, or competition models. If you just want to update your stock model, opt for our superstock model. This transmission is compatible with engines with 550 HP, and they’re designed for everyday commuting and towing. For those looking to push their truck to its limits, we recommend the competition model. This transmission can accommodate engines with up to 1500 HP, and it allows for quick acceleration, racing, and heavy-duty towing. Order yours today!