Built to Hold

Build guides, transmission tech, and install notes from the Gearstar shop floor. Every unit we ship is assembled by one builder, matched to your combo, and dyno-tested before it goes out the door. This is where we show the work: what holds, what grenades, and how to spec it right the first time.

Transmission Upgrades That Meet Your Need for Speed

Transmission Upgrades That Meet Your Need for Speed

Gearstar Performance 8 minute read

Are you a racer or you're out to get one of the speedy cars with a strong rear-wheel horsepower? Then you can achieve your need for speed by packing a...

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...