ECTED stands for Electronically Controlled Traction Enhancing Differential. It is a revolutionary product with respect to traction technology. ECTED provides the user with selectable limited slip or locker mode. When selected ''off'', the ECTED functions as a performance limited slip differential for on and off-road excitement. When selected ''on'' the ECTED becomes a locker or spool which is ideal for the quarter-mile or the nastiest off road terrain. The 9310 gear material makes ECTED tough as nails. In addition, it can be switched on the fly at any speed because there are no locking forks or pins that are prone to failure. ECTED is easy to install and is made in the USA.