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.
Ford 4R70W and 4R75W Installation Instructions
PLEASE FEEL FREE TO CALL US ON OUR TECH LINE AT (330) 434-2757 BETWEEN 8:00 AM AND 5:00 PM EST IF YOU HAVE ANY QUESTIONS. Please read instructions...
All You Need to Know About Performance Transmission Parts
The transmission is one of the most critical components of a vehicle's powertrain. It transmits power from the engine to the wheels, allowing the vehicle...
The ABCs of a 4 Speed Automatic Transmission
Automatic transmissions are mechanisms designed to shift the gears of vehicles with the increase or sudden decrease of speed. Since the mechanism is automatic,...
E40D Transmission Swap – Hot Rod Hauler
Check out this E40D transmission swap on this 1973 Ford f350. Read more only at www.customclassictrucks.com, the official website for Custom Classic Trucks...
6L80 vs 6L90: Devil's in the Details
The 6L80 and 6L90 are two of the most popular rear-wheel transmissions from General Motors. So many things have been discussed about these remarkable...
6L80E Transmission Specs and Identification
The arrival of 6L80E transmissions – or Hydra-Matic 6L80 transmissions – on the automotive scene in 2006 showcased the considerable design change of the...