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!
  1. Home
  2. Questions
  3. My 4x4 system stopped working.

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: put bad gas in it started to run rough then wouldn't start. replaced clean tank out, replaced fuel pump and filter, pressure regulator

You may have contaminated and clogged the fuel injectors. You can try and clean the injectors if you can get it started, or you may need to replace the injectors if you cannot get it to start. Make sure the...

Q: 4x4 not working. Replaced transfer case motor, control module, and tested the 4WD switch. Everything is good.

Hi there. The synchronizer or fork inside the transfer case may be damaged causing the transfer case to not engage the front axle. Try to put the transfer case in 4 HI and see if the vehicle is engaging. If...

Q: Power steering studding

If you drained all the power steering fluid and then refilled it you should turn the wheel all the way left and right without letting the steering go to left or right steering lock or more air will be put...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.