The GM
4L80E transmission has become a top choice for engine swap enthusiasts who demand strength and durability. Its design borrows the rugged foundation of the TH400 while adding electronic shift control for modern drivability. Capable of managing well over 440 lb-ft of torque, it suits high-horsepower LS builds, classic muscle conversions, and heavy off-road projects. With a deep 2.48 first gear and overdrive for highway cruising, the 4L80E delivers both low-end grunt and long-distance comfort. Builders appreciate its tuning flexibility, allowing customized shift points and firmness for different applications. Although slightly heavier than other automatics, its reliability and power handling easily justify the weight. Whether you're upgrading a classic vehicle or creating a high-boost monster, the 4L80E stands as a proven solution with unmatched endurance.
Locked
