At GM, to deal with the increase in vehicle weight and engine power, they designed a new heavy-duty four-speed automatic transmission—the 4L80E—in ... torque converter control (TCC) regulator ...

One of the first things we discovered when we began testing controllers is that we had unintentionally combined a very high-torque engine with a loose converter and a used 4L80E transmission.

Seems like today the debate between going with a stick or an auto in a classic Chevy is more heated than ever. With the advent of better electronics, mechanical innovations, and the natural ...

Gearstar’s 4L80E Level 4 transmission lists for $3,895, and the optional HGM Compushift electronic trans controller runs $850 extra. See All 16 Photos 02.The heavy-duty direct clutch drum (left ...