Case Differential – Ford (3C3Z-4204-AA)

Case Differential is a formed or cast component that surrounds or supports part of the powertrain. Corrosion and cracking at mounting points are the usual reasons for replacement.

Replace the Case Differential when you find a crack that weeps under pressure, or when the mounting ears have failed. Welding a casting rarely restores the original alignment.

Reference number for the Case Differential: 3C3Z-4204-AA. It is filed under Differentials, and it is the number that has to match the part coming off the vehicle.

The stock here is genuine FORD, and this Case Differential keeps the original engineering number, which matters once a number has been superseded more than once.