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.
Valve Body Basics: What Does a Valve Body Do in a Transmission?
Few things are more frustrating than a built transmission that doesn’t respond the way it should. That frustration leads many gearheads to ask: What does...
Transmission Cooler line fittings
For the first tech tip of the year, we are going to cover transmission cooler fittings. On our transmissions we mainly use male -6AN fittings on our...
4L60E Are They All The Same?
There have been several different versions of the 4L60E over the years. They started in the mid 1990’s and continued through the early 2010’s. Over the...
Unlock Peak Performance With Transmission Upgrade Parts
When building a high-performance vehicle, every component needs to keep up with your engine’s power, and that starts with your transmission. Stock units...
What Is a Torque Converter? Key Functions, Components, and Performance Benefits
If you’re building a performance car, refreshing a classic, or putting together a restomod, one of the first questions that usually comes up is: what is...
What is a Transmission? A Guide for Beginners and Gearheads
If there were a crown for “most mysterious car component,” the transmission would probably be a front-runner. For a lot of enthusiasts and weekend...