Built For Your Needs
Upgrade With Confidence
Whether you tow, haul, drive a diesel truck, or want more dependable performance, Sun West Transmissions builds upgrade plans around your vehicle and how you use it.
Torque Converter Upgrades
Auxiliary Cooling Systems
Billet & Heavy-Duty Components
Performance Transmission Builds
Upgrade Options
Built Beyond Stock
We help drivers choose upgrades that match their vehicle and real-world demands.
Diesel Truck Upgrades
Upgrade options for Dodge Ram, Ford Super Duty, and other hard-working diesel applications.
GM Performance Builds
Targeted upgrades for GM 6L80 and 6L90 transmissions, including converter and thermal-bypass options.
Cooling & Reliability
Support demanding driving with cooling and component upgrades designed around your application.
Transmission Upgrades
Built For More Power
Sun West Transmissions provides dependable transmission upgrades for diesel trucks, towing vehicles, and performance applications. We match the build to your vehicle, power goals, and how you use it.
Diesel transmission upgrades
GM performance builds
Auxiliary cooling systems
Torque converter upgrades
Upgrade Options
Built Around Your Vehicle
Diesel Upgrades
Stronger components and improved reliability for trucks that work hard.
Performance Builds
Purpose-built transmission solutions for GM performance applications.
Cooling Systems
Auxiliary cooling to help manage heat under towing and heavy loads.