JTT PERFORMANCE TRANSMISSIONS Diesel Power - It's about going from Mild to Wild ! JTT offers stock overhauls as well as upgrading your diesel's transmission to one of our specialized performance transmissions. We offer top quality upgraded factory rebuilds. We offer gauge installs. We can also perform service to your truck's brakes and differentials. JTT has been part of several diesel racing teams since James opened in 2006. James has a passion for racing and helping you get your truck where you want it to be for performing on the track. For a Quote Request - please go to the "Contact Us" page and send us an email with what you are wanting and we will get back to you within 24 - 48 hours.