That Detroit E-Z locker is a design that replaces the side & spider gears in an open differential with a mechanical locking device. It will not work if you have a G-80 diff.

It is designed primarily for off-road use. When it locks, you feel it. When it unlocks, you feel it. Your vehicle noticibly changes directions as this happens. But they work very well off-road(in the dirt/mud).

There is a good reason that all you ever hear about here is the Eaton LSD or the True-Trac. They operate seamlessly, reliably, quietly, and they are proven to be strong. The Auburn **cheaper** cone style posi diff is also weak and is questionable past 350 hp.