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, ...

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 ...

Attention, Project T-top Coupe followers: We finally executed the drivetrain upgrade that we’ve been highlighting—well, hyping—since we embarked on the 1986 Ford Mustang LX’s resurrection back in ...

4L80Extraordinary! - GM’s race-tested-tough, street/strip overdrive automatic from Performance Automatic is the latest in a respected pedigree GM’s 4L80E overdrive automatic is the latest in a ...

The 4L80E’s larger case, heavier weight, and different mounting points usually require more fabrication, especially in older muscle cars or compact LS swaps, even though both share the same basic four ...