Clutch Adaptions

WARNING: This page is about a different car, the 2018 Land Rover Discovery Sport. However, it is still accessible from the selected car via links, so may be relevant.

When the vehicle is driven, the TCM monitors and refines the clutch pressures and engagement points to maintain smooth transition between gear changes.

After certain service operations, the Clutch Adaptions may need to be reset to restore optimum performance of the transmission.

When the vehicle is driven, the TCM monitors the gear changes. When the TCM determines that smooth and reliable changes are occurring, it initiates a Clutch Adaptions learning cycle. The learning cycle determines if higher or lower PCV pressures are required or if PCV timing can be improved to apply smoother gear change transitions. The dynamic behavior of each clutch is monitored and can be compensated for. The TCM will also monitor static engagement when the vehicle is stationary.

The Clutch Adaptions are initially started after a reset with drive cycles including the ability to cruise at various speeds. The fully Clutch Adaptions are achieved gradually over many drive cycles.

The Clutch Adaptions ensure that the transmission provides smooth gear changes without slip for the life of the transmission. The Clutch Adaptions compensate for wear providing that the Touch Adaptions were correct for the static calibration of the transmission.

The Clutch Adaption process compensates for assembly build tolerances in the hydraulic system, mechanical tolerances of the transmission components to include friction and electrical tolerances for example resistance and inductance. All of these can affect the dynamic behavior of the transmission.

The Clutch Adaptions ensure that the TCM is operating at its optimum operating parameters adjusted to suit the individual characteristics of the transmission. The TCM to a lesser extent, also adjusts to the characteristics of the driver and vehicle.

NOTE: Some drivers and their driving style may inhibit the Clutch Adaption process, which can lead to transmission driveability issues over a period of time.