The GM 4L80E transmission is a top choice for engine swap enthusiasts seeking a reliable, high-capacity automatic gearbox. Its compatibility with LS engines, robust 32-spline output shaft, and electronically adjustable shift control make it highly adaptable to custom builds. Known for supporting high horsepower levels with minimal modifications, it suits turbocharged, supercharged, and big-block setups. Overdrive capability enhances highway efficiency, while its proven TH400 heritage ensures exceptional strength. For builders wanting durability and tunability in one package, the 4L80E remains a benchmark transmission. If you are looking for one, here we have GM 4L80e Transmission for sale.