Norcal Diesel Performance is your go-to place for automatic transmission parts for your truck. Whether you’re new to making repairs on your truck or you’re the only one who has ever been under its hood, Norcal Diesel Performance can help you out no matter what your transmission issue might be. It doesn’t matter if you’re looking for a huge replacement or a single tiny part for your transmission—we can help you find what you need. On this page, we offer plenty of Dodge Cummins diesel parts that can get your transmission back into working order. If you don’t see what you need, don’t be afraid to contact us, so we can find the solution together.