Q: The four wheel drive system is not engaging the front wheels

asked by on

I have a 2004 chevy trailblazer LS 4.2 I6. I don't know what is wrong with my 4x4. The switch works, I checked the transfer case shift motor and it works, I tried replacing the actuator and still nothing. Everything seems to sound fine, The system sounds like everything is moving proper, But still no power to the front wheels. When I Engage into neutral and roll into 4lo i hear/feel it engage, but no power to the front wheels, when i roll out of 4lo into 4hi i hear a loud clank, like if it moved out, or metal hitting metal. Also when i drive with the 4lo engaged i hear a humming noise and it gets louder the faster my car moves. Almost like a winding sound. The next thing i am thinking is the 4wd disconnect housing. I hear the shift forks break within these, but its a expensive part that i don't know if i should try this. Any thoughts?

My car has 170000 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. The four wheel drive system is not engaging the front wheels

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: Will the transfer case out of a 93 manual Dakota fit into a 96?

Hello. My research indicates that those two different model years of Dakota use two different models of transfer case, as indicated by their part numbers. This means that they are likely different and are not cross compatible. Depending on what...

Q: Door lock switch or actuator failure?

The only way to know exactly what is going on with your door locks is with a diagnosis. This should be done with a test light and a wiring diagram. Since the door locks failed in a progression of one...

Q: Was told mount broke off..and need to replace 3 to secure transmussion..also that bed housing could be damaged

What you are describing is possible. Vehicle components can only withstand so much force and beyond that they will break. As far as the bell housing of the transmission, if that housing is cracked, replacing that is a fairly significant...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.