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.

How to Identify a Mopar 727 Performance Transmission

Gearstar Performance August 21st, 2019 6 minute read

The advent of several transmissions since the launch of automobiles means there are a whole lot of them in 2019 and many more can be expected in years to...

Ford C4 and C6 Transmissions: What Are the Differences?

Gearstar Performance August 13th, 2019 7 minute read

Ford's C4 and C6 3 speed automatic transmissions are similar in operational characteristics; however, there are still unique differences between the C4 and...

5 Signs Your Transmission Fluid Is Low

Gearstar Performance August 6th, 2019 8 minute read

Do you own a car and are you aware that your transmission can encounter problems? If that's a no, then be informed that there are sure signs that your...

Building the Perfect AOD Transmission

Gearstar Performance July 30th, 2019 7 minute read

There are simple, yet effective ways to build the perfect automatic overdrive (AOD) transmission through the use of off-the-shelf components and...

200-4R vs. 700R4 Transmissions: A Comparison

Gearstar Performance July 17th, 2019 7 minute read

200-4R vs. 700R4 transmissions are two four-speed automatics that are always compared side-by-side for their similarities, yet unique differences. They may...

Nag1 Transmissions: 5 Things to Be Conscious Of

Gearstar Performance July 10th, 2019 6 minute read

Are you driving a car that uses the W5A580 automatic transmission or do you intend to buy one? Then there are certain things to be conscious of when...

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