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.
Sports Cars That Are Faster with an Automatic Performance Transmission
Some luxury cars with automatic transmission include the Lexus ISF, BMW M4/M5, Audi S6/S8, and Porsche Panamera, to mention a few. Since there are two...
Ford C4 and C6 Transmissions: What Are the Differences?
Ford's C4 and C6 3 speed automatic transmissions are similar in operational characteristics; however, there are still unique differences between the C4 and...
545RFE Transmission Specs and Schematic
The 545RFE transmission is an electronically controlled unit that was great for its time until it was replaced bu the 65RFE and 66RFE. Read below for...
6 Automotive Things to Be Grateful for This Thanksgiving and Beyond
It's Thanksgiving month again, and time to be eternally grateful for everything life has thrown our way - the good, the bad, the ugly, and we survived...
6 Long-Term Benefits of a Rebuilt Transmission
Is your vehicle transmission giving you a headache, and you're already contemplating replacing it with a brand-new one? Replacing a faulty vehicle...
6L90E Transmission Specs and Identification
The 6L90E is a high-performance component suitable for handling as much as 700 horsepower. This 6-speed automatic transmission built by General Motors...