Aluminum Differential Cover Thermal Results

Blacklane wrote:

The new aluminum cover is indeed much thicker than the stamped steel stock cover. That gives it more thermal mass and makes it slower to change temperature. Additionally, the aluminum cover is designed to hold 0.5 quarts more fluid, which also adds thermal mass.

The thermal mass makes no difference to the cooling ability. It just means it will take longer to heat up AND longer to cool down.

Blacklane wrote:
painting the surface black improved the thermal performance.

Black does help with radiative cooling. But the vast majority of the cooling here would be through convection - lots of surface area, lots of moving air when going down the road.