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.
Can You Drive with a Bad Transmission Valve Body? What You Need to Know
Driving with a bad transmission valve body can cause serious damage to your vehicle’s transmission, harm your driving experience, or even result in avoidable...
TH350 vs. TH400 Performance: Which Transmission Offers Better Power and Reliability?
The TH400 holds more power. The TH350 is lighter and shorter. That is the whole comparison in two sentences, and everything else is about matching one of...
What is the Difference Between a 4L70-E and a 4L75E? Key Variations Explained
The 4L70-E and 4L75-E transmissions are both upgrades of the 4L60 series, but they differ in strength and design features. The 4L70-E includes an added...
Prolonging the life of your automatic transmission
Your car's transmission is one of its most vital parts. Without it, your vehicle wouldn't move. Keeping it in good shape can save you from costly repairs...
Protect Your Transmission in The Summer
As you prepare for summer adventures, don’t overlook the importance of regular transmission maintenance. The summer heat can take a toll on your...
Bad Torque Converter Symptoms, Diagnosis, and Fixes
The torque converter sits between your engine and transmission and either puts the power to the ground or turns it into heat. When it starts to fail, you...