Skip the auto shop - Our mechanics make house calls

Q: My 4x4 system stopped working.

asked by on

My 4x4 system stopped working. I have had it in a shop for a few weeks but still nothing. I have replaced the motor on the transfer case, the control switch, fuses, relays, and the gem module. I can't afford to pay for the mechanics to keep trying this and that. What could it be and how do I correct it ?

My car has 160000 miles.
My car has an automatic transmission.

Hi there. First, put the vehicle on 4 jack stands with all tires off the ground. Then, start the engine and put the transfer case in 4 HI. Then put the transmission in Low. Watch the tires and drive shafts to see what is moving. If the front drive shaft is not moving, then either the chain in the transfer case is broken or the fork is misaligned. If the front drive shaft is turning, then the front axle engagement switch has failed and is not working. If your see the wheels trying to turn but you hear a grinding sound, then the front hubs are ground out and need replaced. Shut off the engine and when the vehicle is off, put the transmission in park after the wheels have stopped and lower the vehicle after diagnosing your problem. If you need further assistance with your 4WD not working, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: while driving a I heard a loud pop that sounded like it came through the speakers, the electrical then went out

Hello there, many faults will cause your 2014 Ford F-150 to have a pop and the electrical system failing. You did not state whether the electrical issue is just with the accessories or with the entire vehicle. If the problem...

Q: Transfer case shift motor

Hello. C0327 is the trouble code for a malfunction with the transfer case encoder motor as you alluded. This is the electric motor that allows the transfer case to engage into 4wd mode. This code is commonly caused by water...

Q: Gears slipping on bus

Hello, there are two reasons the vehicle doesn't move. The first thing a mechanic will need to check is your clutch. They will look under the vehicle from outside and see if the drive shaft is spinning when you are...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...