Dakota 4WD V8-4.7L Flex Fuel (2008)
Transfer Case Actuator: Description and Operation
NV244 GENII Transfer Case
Description
DESCRIPTION
The shift motor (2) is an electromechanical device consisting of a DC permanent magnet motor, gear train, and an analog position sensor. The shift
motors' overall function is to move and lock a gear that moves the mode and range forks found in the transfer case. This allows the transfer case to be
shifted electrically to multiple operating positions (4HI, 2WD, N (neutral), and 4Low). The operating current of the shift motor under stall conditions is
30 amps maximum at 72° F with 13.5 volts, at the motor leads.
Operation
OPERATION
Shifting in the transfer case occurs when a Pulse Width Modulated (PWM) voltage is supplied to the shift motor by the Front Control Module (FCM). A
linear analog position sensor located inside the shift motor, provides the FCM with the motors' angular, rotational position. With this information, the
FCM continuously knows the motors' position, and therefore allows it to accurately control the motors' operation, including voltage polarity which is
used to control motor direction.
