Dual Disc Clutch Transmission (DDCT): Operation

WARNING: This page is about a different car, the 2016 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.

The Transmission Control Module (TCM) identifies the requests from the driver by monitoring the position of the gear shift lever. The TCM independently manages gear changes and directly controls the clutches. During gear changes, the TCM manages the Powertrain Control Module (PCM) to directly control engine torque output. The synergy between transmission and the engine improves the performance of the system considerably and frees the driver from any need to synchronize clutch-accelerator movements during gearshifts which can be carried out with the accelerator fully depressed.

The system inhibits requests for incorrect gear changes and prevents the engine from stalling or over-revving.

In terms of driving assistance the system ensures the immediate availability of first gear when the vehicle stops, and automatic down-shifting in the event of hard deceleration. The gear engaged is displayed in the instrument cluster. The cluster also can display warning or failure messages as well indicate in the same way as the signalling of faults or critical driving conditions for the vehicle or the transmission components with a series of warning or failure messages for the system together with the illumination of the Malfunction Indicator Lamp (MIL).