Transgo Performance Transmission Hard Parts

TransGo Performance: Over 65 Years of Transmission Expertise

Since 1959, TransGo Performance has been one of the most trusted names in automatic transmission repair and performance upgrades. Founded in El Monte, California, this privately held company built its reputation on a simple but powerful idea: give professional technicians and DIY enthusiasts the tools to diagnose, repair, and improve automatic transmission performance without pulling the entire unit from the vehicle.

TransGo's flagship product line — the SHIFT KIT® automatic transmission shift kit — has become an industry standard. SHIFT KIT® valve body repair kits are engineered to restore hydraulic integrity with components that address the most common driveability complaints and transmission failures. From TCC shudder and slippage to harsh shift feel and clutch pack failures, these kits tackle root causes rather than symptoms. Each kit arrives as a complete solution in one box, making them a favorite of professional transmission rebuilders and independent repair shops worldwide.

What sets TransGo apart is their engineering depth. Their kits include valve body, servo, pump, and accumulator components and modifications designed to deliver increased durability while providing short, smooth shifts as well as a more efficient TCC apply. Many of their drop-in valves are precision-ground, USA-made hardened steel pieces featuring longer lands that restore the hydraulic integrity of the circuit by utilizing previously unused and therefore unworn areas of their bore, while redistributing the load over a greater surface area for increased longevity.

For enthusiasts who want more than a stock restoration, TransGo's Reprogramming Kit™ automatic transmission valve body kits take things further. Designed for modified performance vehicles, hot rods, race cars, muscle cars, severe-duty, off-road, motor homes, camper vans, and tow vehicles, these high-performance valve body kits deliver slightly firmer shifts with quicker action, an overall line pressure increase, and more pressure for passing gear. They offer customizable performance without sacrificing transmission durability — a balance that has earned TransGo loyalty across every segment of the automotive hobby.

Beyond their kits, TransGo also offers individual automatic transmission valve body components and a wide range of supplemental upgrades. TransGo offers shift kits for both manual and automatic transmissions, as well as reprogramming kits, high-performance servo kits, transmission accumulator pistons, torque converter conversion kits, and more.

Whether you're a professional rebuilder diagnosing a high-mileage transmission or a performance enthusiast pushing your drivetrain to the limit, TransGo Performance provides targeted, engineered solutions backed by more than six decades of hands-on transmission knowledge.