Feb 012014
 

Can’t get the transfer case to go into 2 wheel drive stuck in auto 4wd I think can’t install new transfer case shift selector

  One Response to “2004 chevy tahoe”

  1. If you are in a very cold climate, the first thing I would do would be to get it inside a warm garage and let it thaw out. This takes care of 90% of these cases i have come across under these conditions. If it is warm where you are at then its another story.

    good video for replacing the shift motor:
    youtube.com/watch?v=wOXVXc8F0Bg

    ACDelco now offers the 4WD transfer case actuator motor and range selector position sensor for 2003-2007 GM full-size trucks.

    Both the actuator motor and sensor (part number 88962314) or the sensor only (part number 88962315) can be ordered.

    It is often more cost-effective to replace the sensor, but care must be used in the replacement procedure. On these vehicles, the transfer case actuator assembly consists of a permanent magnet DC motor and gear reduction assembly.When activated, it turns the shift detent lever shaft to shift the transfer case. The motor/encoder is controlled with a pulse-wide modulated (PWM) signal by the transfer case shift control module. When replacing the actuator motor or sensor (see Photo 1), shift the transfer case to Neutral prior to removing any components. This will make it easier to reassemble.

    Chevy Transfer case shift selector motor

    Sensor Replacement
    If only the sensor is being replaced, be sure to assemble the harness to the new encoder with the connector legend TOP and the encoder part number facing up. With the output gear/encoder assembly in hand, carefully align the casting and output gear timing marks.

    At the same time, align the encoder phasing post with the phasing slot in the casting (see Photo 2) before inserting the shaft into the bushing. Also press a new seal into the cover before installing the cover.
    shift motor encoder

    Shift Abuse
    The transfer case may stop shifting on these vehicles if the transfer case shift control module senses repeated shift requests in a short period of time. The control module software has a shift abuse lockout mode to protect the module and encoder motor. If the driver tries to shift into and out of different modes continuously, the control module will stop trying to shift for several seconds to prevent abuse damage from occurring. Cycling the ignition off for 30 seconds or more should allow the transfer case to resume normal operation.

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