The 4L60E and 4L80E are two of General Motors’ most discussed automatic transmissions, and the choice between them shapes how a truck, SUV, or LS swap behaves on the street and under heavy load. Both ...

Remember when the "new" 700-R4 came on the scene? Well, the 700-R4 was introduced 30 years ago in 1982 and is still a solid choice for an overdrive transmission for carbureted cars. The GM 4L60E ...

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 ...