Gearstar Performance

Custom Transmission Build Team

  • torque converter matching
  • dyno testing
  • transmission installs
  • GM performance automatics
  • Ford performance automatics
  • Mopar performance automatics




Gearstar Performance Transmissions has been hand-building high-performance automatics in Akron, Ohio since 1996. Every unit is assembled start to finish by one builder, matched to the customer's engine, gearing and intended use, then dyno-tested before it ships. The build team writes here about transmission specs, install procedures, torque converter matching and what actually holds up behind real power.

Smooth Sailing: The Importance of Year-Round Transmission Maintenance

Smooth Sailing: The Importance of Year-Round Transmission Maintenance

Gearstar Performance 5 minute read

The phrase 'smooth sailing' isn't just for mariners. In automotive care, it perfectly encapsulates the essence of a well-maintained vehicle, particularly...

Here’s What You Should Know About Ford 4R70W Transmission

Here’s What You Should Know About Ford 4R70W Transmission

Gearstar Performance 7 minute read

Most of you may know that the 4R70W transmission, an upgraded version of the AOD transmission dating back to the 1980s, has established itself as a...

Winterizing Your Car Transmission: Essential Care Tips

Winterizing Your Car Transmission: Essential Care Tips

Gearstar Performance 7 minute read

To ensure you can take the best care of your vehicles transmission during the winter, it's important to have a comprehensive understanding of how it...

Your Guide To Choosing Ford C4 Performance Racing Transmission

Gearstar Performance 6 minute read

When upgrading your vehicle's performance, one critical component to consider is the transmission. Ford's C4 transmission, originally produced from 1964...

The Fundamentals Of Transmission Slipping: Causes, Signs, and Prevention

Gearstar Performance 6 minute read

Your vehicle's transmission is vital for converting power from the engine into motion, allowing your car to move smoothly. Whether you're driving a...

All You Need To Know About the Turbo 350 Transmission

All You Need To Know About the Turbo 350 Transmission

Gearstar Performance 5 minute read

The Turbo 350 Transmission, often called the Hydramatic 350, is an iconic piece of automotive engineering with a storied history and a sterling...

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