Showing articles & questions for topic
4WD

Related articles

Symptoms of a Bad or Failing Front Axle Engagement Switch
If your car has four-wheel drive but the system cannot engage, gets stuck, or does not activate, consider replacing the front axle engagement switch.
How to Rent a 4WD Vehicle
Rental vehicle companies provide you with the option to choose different vehicles to suit your needs. Rental companies have fleets of vehicles that contain sub-compact through luxury full-size...
How All Wheel Drive Works
What is All-Wheel Drive? All-Wheel Drive (AWD) vehicles send power to all four of the wheels. This can be done in a number of ways but the end goal is improved traction...
How Long Does a Front Axle Engagement Switch Last?
If you drive a 4x4 vehicle then you have what is called a front axel engagement switch. This switch is responsible for controlling your actuator, which is what signals the...
3 Essential Things to Know about Four-Wheel Drive (4WD)
Four-wheel drive is a form of drivetrain. A four-wheel drive vehicle has two or more axles, which provide power to four wheel ends. These vehicles have a transfer case, which means the...
5 Essential Things to Know About Off-Roading
Ah, the thrill of going off-road! If you’ve done it, you know there’s nothing better than showing off your expertise and skill. However, if you haven’t, there are five essential things you need to know...
What Does the Four Wheel Drive Warning Light Mean?
The four wheel drive light means your car has activated four wheel drive. If the Service 4WD light is on, there may be an issue with the system.
How to Tell if Your Car is Front or Rear-Wheel Drive
Every car has a drivetrain of some sort. The drivetrain is a system of transferring your car engine’s horsepower to the drive wheels that propels your car. The...
5 Essential Things to Know Before Buying a Truck
Trucks are a popular option thanks to their overall versatility. They can haul people and things with ease, and they handle off-road adventures like champs. However, there are five essential things to know before...

Related questions

Question
Difference between 4WD, AWD and FWD? Is AWD or 4WD necessary in SUVs? or will FWD do OK with winter tires?
Hello, the difference between four wheel drive, all-wheel drive, and front wheel drive is the difference in how your vehicle transfers energy to power the vehicle. Four wheel drive is a vehicle that uses two wheels to propel the vehicle...
Question
4x4 issues
Hello and thanks for your question. When you shift from 2WD to 4WD the vacuum solenoid is to help switch the transfer case from 2WD to 4WD a slow to no speed. If you changed the vacuum solenoid and nothing...
Question
4wd not working, just making a clicking nose
Hi, thanks for writing in. It sounds like you have the NV233 transfercase. The transfercase control module receives input from various sensors and switches, including the tranfercase range switch. It then uses this information to engage the transfercase actuator/encoder motor...
Question
I can't get my truck out of four wheel drive
Hello. Most of the time this occurs when the actuator in the transfer case fails. If the actuator was not when you went through the puddle then that could cause it to fail from the sudden change of temperature. This...
Question
I have a 2004 Dodge Dakota that needs the front wheel hubs changed. It is 4wd with all wheel ABS. I need some tips.
When I replace a hub, I don't necessarily remove the CV joints. I do, however, remove the nut that is holding the CV joint onto the hub. You will need to remove the brakes and rotor, the upper and lower...
Question
4WD is not engaging on my1997 Chevy Blazer
Hi there. The problem with the transfer case can be caused by the encoder motor/transfer case motor loosing power, the transfer case engagement switch failing or loosing power, the vacuum actuator under battery tray loosing vacuum, the vacuum actuator valve...
Question
4X4 module bolt removal
Hello and thank you for contacting YourMechanic. You may have to remove the air ducting to the A/C to gain access to the bolt. All you need to do is remove two bolts to the air duct and you can...
Question
A violet fluid beneath my truck
Hi and thank you for contacting YourMechanic. I would inspect around the water pump. I have never seen violet colored antifreeze so that's my first caution. If the water pump is leaking that much, you will see and smell it....
Question
"Service 4WD" shows on the dash
Hi there. Check the harness wires from the transfer case to the output shaft speed sensor. See if the speed sensor wires are burned and shorted into the harness. This could cause the 4wd to engage when ever and at...
Question
How long does it take to change oil pan gasket on a 05 Envoy Denali?
Hi and thanks for contacting YourMechanic. It takes the dealer about 1 hour and 25 minutes to replace the oil pan gasket. However, it all depends on what type of experience the person has in removing the pan and gasket...
Question
My 4WD is not engaging. Is a 2007 Silverado have electronically controlled axle actuator or vacuum? Or is my problem in the hubs?
Hi there. The actuator on your 4WD system to your vehicle is electronic. Most of the Silverado 2500 model Chevrolet trucks have issues with the actuator failing in the front axle due to weather and road conditions. Check the harness...
Question
Front wheel 4-wheel drive is locking up when coming to a stop
Hi there. It sounds like you could be having a brake concern. If the front wheels are locking up, there could be issues with the abs actuator, brake lines, calipers, or proportioning valve. As this is a safety issue, I...
Question
Why is my 4-wheel drive engaging while I'm driving?
Hey there. Driving with 4x4 on when it is not needed can be rough on the axles, transmission, and hubs. The 4x4 engaging on its own can be the result of a mechanical error or an electrical error. Mechanically...
Question
43R-000711 1995 Jeep Cherokee
Hi there - if position 5 of your VIN is a "J", it is 4WD. If position 5 is a "T", it is 2WD.
Question
The four wheel drive system is not engaging the front wheels
From what you are describing it sounds like you have either a failure in the transfer case or in the front axle actuator. I usually drain the fluid from the transfer case first and check it for metal. If there...
Question
Vibration you can feel in steering wheel , floor, gear shifter and passenger seat. - 2014 Ford Explorer 4WD
Hi there - I suspect your vibration behavior is caused by driveshaft problems with one or both of the driveshafts. This may be simply an out-of-balance problem, or a mis-aligned or bent driveshaft issue. You should have eliminated bent wheels...
Question
4WD transfer case issue
Hi there. It seems like what happened was, when putting the vehicle in 4WD low and driving at a high speed on pavement this could have caused the front axle to burn up. This is because the front differential has...
Question
4WD is stuck in low range - 2001 Toyota Land Cruiser
Hi there, your 4WD problem is likely caused by bad linkage to the transfer case, or a bad transfer case shift actuator. Unfortunately, this is not a repair YourMechanic is able to offer at this time. Check with a local...
Question
Turn knob to four wheel drive but won't go into four wheel drive. I changed the switch and actuator but it won't work
Hello. The 4WD system consists of a module, encoder motor, and actuator. The module operates the transfer case (component that sends power to the front differential). The transfer has an encoder motor that shifts the transfer case by the commands...
Question
I think my four wheel drive is locked. What will cause this issue?
Hi there. There is an actuator on the front axle that engages the front axle to make the 4WD work. Your transmission is an all wheel drive transmission and the actuator is what disengages the front axle so the vehicle...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.


Ask a question