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.

Gearstar - 4R70W Performance Transmission Specs, Updates, and More 

Gearstar Performance 6 minute read

The 4R70W performance transmission, an updated model from the AODE, was released in 1993 by Lincoln Mark VIII. The significant improvement of the 4R70W...

How to Choose the Right Chevy Torque Converter

How to Choose the Right Chevy Torque Converter

Gearstar Performance 5 minute read

It's important to know how to choose the right torque converter for your chevy GM to ensure it is the rugged ride you expect it to be.Admittedly, torque...

Shifting Your 4L60E Transmission From Weak to Wicked

Shifting Your 4L60E Transmission From Weak to Wicked

Gearstar Performance 5 minute read

Rebuilding your 4L60E transmission can transform it into a tougher performance transmission.It'll have more durable components, increased torque and horsepower,...

Where Max Power and Good Cruisin' Collide, the 4L80E Transmission Awaits

Where Max Power and Good Cruisin' Collide, the 4L80E Transmission Awaits

Gearstar Performance 5 minute read

There are several benefits of having an overdrive transmission.First off, these transmissions enable a car to use deep rear gears, which results in...

Which Performance Automatic Transmission is Best for Your Swap Project

Which Performance Automatic Transmission is Best for Your Swap Project

Gearstar Performance 6 minute read

An 'LS swap' is a switch and installation of the engine. The specific LS engine you would like to start with will largely depend on the budget with...

Ultimate Guide to the 4L80E Transmission

Ultimate Guide to the 4L80E Transmission

Gearstar Performance 6 minute read

The 4L80E transmission was introduced in the GM C/K Trucks line-up – to the delight of motorists – in 1991. The legendary TurboHydramatic TH400 automatic...

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