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 ...

It's the 4L80E that’s become the go-to choice for backing a big-power/big-torque engine, and for good reason. With its roots in the TH400, which was used with GM’s biggest-torque big-block engines of ...

The rate at which horsepower has increased over the past three decades has been breathtaking. The V-8 engine’s efficiency has been on a volcanic upswing to the point that 1,000 hp is now the new 500 ...

GM’s 4L80E overdrive automatic is the latest in a continuing legacy of rugged Turbo-Hydramatic transmissions from Chevrolet. Fifty years ago, the TH350 and the TH400 transmissions were a new ...

The big boss needs a new transmission for his ’61 Bel Air, and his underlings (us) must deliver. And by big, we mean really big. TEN’s Executive Vice President of Aftermarket Automotive, Doug Evans, ...

With their debut in the 1990s, GM's 4L60E and 4L80E transmissions reveal some of their differences –- and similarities –- right in their names. The "4" and "L" respectively refer to the number of ...

Add Yahoo as a preferred source to see more of our stories on Google. With their debut in the 1990s, GM's 4L60E and 4L80E transmissions reveal some of their differences –- and similarities –- right in ...