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.
Automatic Transmission vs Manual: What You Need to Know for Performance Builds
When building a performance car, restoring a classic, or assembling a street/strip machine, one of the first decisions you must make is whether to choose...
Preventative maintenance with your transmission
Transmission Slip Yoke and measurements
Why the TH350 Transmission Is Still a Favorite Among Classic Chevy Owners
When you talk about classic Chevy cars, the TH350 transmission always finds its way into the conversation. It’s not just a part. It’s a legend in its own...
How to Choose the Right Level AOD Transmission for Your Ford
Choosing the right AOD transmission for your Ford isn't just about horsepower. It's about how you drive, what your car can handle, and what you expect from...
GM 4L70E Transmissions
Like most AODs at the time, GM 4L70E transmissions were designed with lightened materials to support better fuel efficiency, 4 speeds, and...