Can you be more specific? Are you talking about the standard stability control or the brake lock differential? FDII, FDI, or FWD?
break lock differential applies brakes to the wheel spinning, making it so more torque is required to spin it, thus forcing more torque to the other wheel. Its better than just having an open differential, but not as good as having actual lockers, which lock the two axles together.
if you are interested in lockers email arb, they are looking into seeing if lockers would be worth their time to build. And need to know what interest is out there for a patriot to have a locker available.