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.
4R70W Transmission-Swapped Fourth-Gen Mustang?
The fourth generation Ford Mustang can be made faster and more reliable by carrying out some performance upgrades instead of adding more power. It may...
Gearstar is the official transmission supplier for West Coast Engines
Gearstar is the official transmission supplier for West Coast Engines! West Coast Engines shares the business philosophies we do: quality products, custom...
Overview of the GM TH400 Transmission
The TH400 or Turbo 400 is a good transmission that was used in several cars years ago. This popular transmission was found in GM’s cars, as well as,...
Torque Talk: Benefits of Installing an Aftermarket Torque Converter
If you own a car with an automatic transmission, chances that you've heard the term "torque" or "torque converter" from time to time. But what do all...
The Logic Behind a 10-Speed Transmission
There are six, seven, and eight speeds transmissions, which may already seem like a lot to meet any car's enthusiast need for speed and great performance....
Why More Turbo Boost Doesn't Always Mean More Power
Did you know that more turbo boost does not always translate into more power? If you didn't, we're going to give you some reasons why that is and what...