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.
Rebuilt vs. Remanufactured Transmissions: What's the Difference?
Replacing your transmission (after the old one has failed) can be a bit confusing. Should you choose a rebuilt model, a used model, or a remanufactured (reman)...
4L65E Transmission Specs and Updates
Here's an overview of the 4L65E transmission specs and updates to keep you informed of what this unit offers and subsequent upgrades to it. It's worth...
4L60E vs 4L80E Performance Transmission Differences
A comparison of the 4L60E vs 4L80E performance transmission shows that there are clear differences between both units. Although they may have...
GM 4L80E Transmission – A Solid Performer
When it comes to vehicles, these days, we all want maximum horsepower. The more the horsepower, the better the engine performs. However, it also has a...
3 Signs of a Failing Turbo 400 Torque Converter to Beware Of
You may not know this, but when you drive an automatic transmission car, you have the upper hand over your car’s torque converter. The reason? The reason...
Understanding GM 4L80E Transmissions: Earlier Models & Upgrades
4L80E by General Motors is one of the most popular four-speed automatic transmissions out there. First introduced in 1991, these transmissions went through...