Driver Controlled Center Differential - typically used in Subaru Impreza WRX STI models. It allows the driver to control the power split between the front and rear wheels within a predefined range.

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All-wheel drive performance cars are rare enough. But the WRX STi is even more unique because the driver can choose the value of the torque split between the front and rear wheels! Whether the driver makes adjustments to torque distribution in the manual mode via the console-mounted control wheel or entrusts distribution decisions to the DCCD control module through the automatic mode, the ratio of front/rear torque distribution can vary from 35 percent front/65 percent rear to 50 percent front/50 percent rear.

In automatic mode, DCCD varies torque according to input indicating acceleration, deceleration, cornering force and wheel slippage. In manual mode, the driver selects from six stages of center-differential lock-up. The more lock-up, the greater the torque directed to the front wheels – up to the 50 percent front/50 percent rear ratio. Mechanical limited-slip front and rear differentials enhance the system’s effectiveness.