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.

Transmission Tech Tips for Hard-Cornering, Fast Drivers

Transmission Tech Tips for Hard-Cornering, Fast Drivers

Gearstar Performance 5 minute read

You have a high-performance vehicle alright, and you love to drive it fast and pull hard into corners. While that may give you the needed thrill and...

10 Performance Upgrades Your Car Will Absolutely Thank You For

10 Performance Upgrades Your Car Will Absolutely Thank You For

Gearstar Performance 6 minute read

What else can you be thankful for? The best performance upgrades that can transform your car into a fast and furious ride just by increasing its...

Overview of the 700R4 Transmission

Overview of the 700R4 Transmission

Gearstar Performance 6 minute read

The 700R4 transmission is an automatic transmission that was found in GMC and Chevrolet cars and trucks. It was developed with the aim of improving fuel...

Importance of Fuel Stabilizer When Storing Your Vehicle Long-Term

Importance of Fuel Stabilizer When Storing Your Vehicle Long-Term

Gearstar Performance 5 minute read

The importance of adding a fuel stabilizer when storing your vehicle for a long term cannot be over-emphasized. If you've just refilled your tank or...

Hottest New Products for Muscle Car Enthusiasts

Hottest New Products for Muscle Car Enthusiasts

Gearstar Performance 6 minute read

The hottest new products for muscle car enthusiasts have been designed to amplify every aspect of the car. You can rely on the expertise of numerous car...

Overview of the 4L85E Transmission

Overview of the 4L85E Transmission

Gearstar Performance 6 minute read

The 4L85E transmission is a series of an automatic transmission from General Motors. It is also popular since it is a heavy-duty transmission that was...

⇠ Previous Next ⇢