Question about Dodge Cars & Trucks
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Posted on Jan 02, 2017
SOURCE: where is the transfer case
The transmission control module and the transfer case control module are separate parts. The transmission control module is mounted under the hood and controls only transmission functions. The transfer case control module controls only the transfer case, and is located inside the truck. If you remove the trim panel under the steering column you will find the transfer case control module mounted just to the right of the opening.
The shift motor is located just behind the axle tube to prevent damage.There is a shift motor on the right front axle that is vacuum operated.
The shift motor (1) is an electromechanical device consisting of a DC permanent magnet motor, a motor brake, a gear train and an analog position sensor. The shift motors' overall function is to move and lock a gear that moves the mode fork found in the transfer case. This allows the transfer case to be shifted electrically to multiple operating positions (4LOCK and AWD). 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
Shifting in the transfer case occurs when the shift motor brake is released and 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.
REMOVAL :---Note: New shift motor assemblies are shipped in the AWD position. If a new shift motor assembly must be installed, it will be necessary to shift the transfer case to the AWD position prior to motor installation. Raise the vehicle on a suitable hoist.Remove the front propeller shaft. Disengage the wiring connectors from the shift motor and mode sensor.Remove the front output shaft companion flange from the transfer case.Remove the bolts (Remove the Shift Motor and Mode Sensor Assembly Bolts) holding the shift motor and mode sensor assembly onto the transfer case.Separate the shift motor and mode sensor assembly from the transfer case. See fig below:--
1 - TRANSFER CASE.2 - SHIFT MOTOR AND MODE SENSOR ASSEMBLY.3 - BOLT.-- This should help.Thanks.Helpmech.
Posted on Feb 26, 2011
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