Gale Banks is on a quest to determine if aftermarket differential covers actually do anything. In the latest video on the topic, he takes a look behind the stock steel rear diff cover to see what's really happening when you're on the road. Buy Banks new patented Ram-Air Diff Covers here: https://www.bankspower.com/diffcovers Watch the full "Behind the Diff Cover" video series here: https://youtube.com/playlistlist=PLwtmrqcWzLtQR9riOg8mizIEjUX4WBBm