Gearstar Performance

Custom Transmission Build Team




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.

Are Most High-Performance Cars Automatic?

Are Most High-Performance Cars Automatic?

Gearstar Performance 10 minute read

Audi S6/S8, Lexus ISF, BMW M5/550i, Porsche Panamera, to name but a few are some sports cars with automatic transmission. A lot of people have come to...

10 Mods That'll Make Your Car Faster (and 10 That Won't)

10 Mods That'll Make Your Car Faster (and 10 That Won't)

Gearstar Performance 10 minute read

Don’t you just hate it when your car runs slow? If that's a yes, then a good knowledge of some easy mods that'll make your car faster and how to implement...

Manual vs. Automatic Transmissions: Auto Industry's Greatest Rivalry

Manual vs. Automatic Transmissions: Auto Industry's Greatest Rivalry

Gearstar Performance 6 minute read

It was the 1930s, the era of the Great Depression, a time when America was facing hopelessness and desperation as the prospects of war slowly grew to a...

Upgrading a 4L70E Transmission

Upgrading a 4L70E Transmission

Gearstar Performance 6 minute read

The 4L70E is one of several GM-produced electronic automatic transmissions developed as a successor to the Turbo-Hydramatic line of transmissions, some...

Overview of GM's Stronger 4L65E Transmission

Gearstar Performance 6 minute read

The 4L65E transmission is built for Chevrolet, as an improved iteration of the 4L60E, and a successor to the 700R4. Unlike its predecessors, the 4L60E...

200-4R Transmission: The Holy Grail of Power, Fuel Efficiency

200-4R Transmission: The Holy Grail of Power, Fuel Efficiency

Gearstar Performance 6 minute read

If you are looking for a way to upgrade your classic muscle car’s Powerglide or TH350, then you would be hard-pressed to find a better answer than the...