To handle great amounts of horsepower generated by large-displacement engines, a vehicle requires a robust and solid transmission to ensure it can effectively distribute said power to the wheels. That ...

The 4L60E and 4L80E were both developed by GM, and there are many similarities in their designs. However, there are key differences between the transmissions.

Our 5,400-pound, 400hp 4x4 has chewed through no less than four 4L60E four-speed automatic transmissions in less than a decade. The failures have included: a smoked torque converter clutch, which ...