Common questions

What does the transfer case actuator motor do?

What does the transfer case actuator motor do?

TRANSFER CASE ACTUATOR The GM Genuine Original Equipment Transfer Case Actuators are electric motors that perform transfer case shifting in electronically controlled four-wheel drive systems. They are located on the outside of the four-wheel drive transfer case housing.

Why is my transfer case actuator not working?

If you have both of these symptoms then the culprit is very likely to be a stripped gear inside the transfer case motor. The transfer case actuator motor is a small motor that is bolted on to the transfer case and can be removed and replaced (or repaired with a new internal gear).

What do I need to fix BMW transfer case actuator?

You may need some special female torx (star) socket bits for the bolts that hold the actuator motor on (link below). Some universal socket joints for accessing the torx bolts (I had a hard time getting my socket wrench to fit in the space, only was able to do it with a universal joint).

What does a GM transfer case motor do?

One is a 1999 model, the other a 2000. Both use the same controls and happen to have stored the same DTC. The basic system consists of a transfer case motor and encoder, front differential actuator, transfer case module, speed sensors, switches and park input and output to the PCM.

What are symptoms of bad transfer case control module?

If the shift is not possible, the selector switch will come on and flash for 30 seconds. Locating the TCCM is not tough. Will BMW End the Production of Manual Cars? Symptoms of a bad TCCM are likely to include flashing a warning message or turning on a warning light on the Driver Information Center (DIC).

If you have both of these symptoms then the culprit is very likely to be a stripped gear inside the transfer case motor. The transfer case actuator motor is a small motor that is bolted on to the transfer case and can be removed and replaced (or repaired with a new internal gear).

How does a transfer case work on a motor?

The transfer case module sends 8 volts to the switches, then monitors the return circuit to determine whether any of the switches is depressed. It can determine this because each switch has a different resistor in series with the circuit.

You may need some special female torx (star) socket bits for the bolts that hold the actuator motor on (link below). Some universal socket joints for accessing the torx bolts (I had a hard time getting my socket wrench to fit in the space, only was able to do it with a universal joint).

Why did I remove the transfer case from my 4WD?

My 4wd has worked flawlessly ever since. Removed the old one after a couple of months of receiving “Service 4WD” message on console, just in time for winter, just in time because it would not shift the transfer case into Neutral, 4WD HI or 4WD LO any more. So, the old one was removed with the TC still in Rear WD.

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Ruth Doyle