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.
Shifting Into Overdrive With Performance Automatic
Many transmissions in the past may have been designed without an overdrive, but this is not the case with modern transmissions. The reason is because of...
Overview of the 4L80E Transmission
The 4L80E transmission was produced in October 1963 by General motors for longitudinal engine configurations. This transmission is a revamped version of...
The 4L80E Built With the Latest and Greatest Parts
The 4L80E may be an old transmission from General Motors, but it has been revamped with the latest and greatest modern parts to boost its performance. As...
Was Your Transmission Rebuild Dyno Tested?
Whether your transmission rebuild is working perfectly today, or it is already giving you problems, great thought has to be given to its dyno-testing because...
Why Are Automatic Transmissions Better Than Manuals?
There’s an everlasting debate around manual and automatic transmissions, with both the types showcasing some promising pros and cons. However, modern...
6 Tips on Buying Performance Transmissions Online
You may be torn between the decision of whether it is worth replacing or rebuilding a transmission. It may also become an important decision to make,...