Grand Caravan V6-4.0L (2008)
Transmission Speed Sensor: Description and Operation
40/41TE Automatic Transaxle
OPERATION
The TCM calculates the desired line pressure based upon inputs from the transmission and engine. The TCM calculates the torque input to the
transmission and uses that information as the primary input to the calculation. The line pressure is set to a predetermined value during shifts and when
the transmission is in the PARK and NEUTRAL positions. This is done to ensure consistent shift quality. During all other operation, the actual line
pressure is compared to the desired line pressure and adjustments are made to the pressure control solenoid duty cycle.
