Differential Cooler: Overview
WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
The differential oil cooler increases axle performance and extends axle life by maintaining the differential oil temperature within a predetermined threshold. This is accomplished by the PCM through the use of a temperature sensor, an electric oil pump, a relay and an oil cooler.