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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

Four-wheel drive thumping noise. 2006 Mazda B4000
Hello. It sounds like the transfer case is going bad causing the thumping noise you are hearing. The transfer case transfers power to the front wheels so that all four tires are working during four-wheel drive. If the transfer case...
4x4 Low Light jolts
Hello. It sounds like the transfer case is staying engaged. This is usually due to the encoder motor failing and causing this. I usually check the connections first to see if there is any moisture in them as that will...
Engine revved in drive - 2006 Chevrolet Avalanche 2500
This sounds like the transfer case isn't completely engaging selected gears (High/Low, 2/4wheel drive). There is a GM Service Bulletin on this issue - TSB Reference #3424. Check with your dealer on this one.
The vehicle is 4wd drive and wont shift back to 2wd.
Hello there. You have one of a few possible things going on with your 1992 Mitsubishi Montero. If the gearshift shows 2WD and the vehicle is in 4 high, the most likely fault is either the transfer case shift linkage...
Cannot switch to four-wheel drive
Hello. A flashing 4WD light is an indicator that the computer has detected that the 4WD is not engaged. This can commonly be caused by a faulty 4WD vacuum servo or loose vacuum hose. I would check to see that...
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...
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...
Four wheel drive malfunction - 2003 Chevrolet Silverado 3500
Hello. It sounds like some damage has been done to the transfer case or the front differential. The damage sounds pretty bad if the 4HI is not locking into place. More than likely, the transfer case and/or front differential will...
Grinding when 4WD is engaged
The best way to diagnose this problem is to have your vehicle inspected by a professional, such as one from YourMechanic. However, I can make some educated guesses about your noise. There is a Technical Service Bulletin (TSB) for your...
Unplugged wires ECM DTC
Hello. It is a common issue for the ABS control module to go bad on these trucks. Either the modules are ridiculously expensive or they just aren't available anymore. That is why the connector was unplugged. That is the "cheap"...
My 2000 blazer switches itself into 4x4 while driving along and then will not disengage
Your Blazer has a vacuum switch inside the transfer case that can fail which can cause the vacuum to leak pass the seals in the switch which will apply vacuum to the front axle actuator. When this happens, the front...
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...
Bad gas mileage and always runs in 4WD - 1979 Chevrolet K20 350 V8
Hi there, thanks for your question. Yes, these older Chevys do have full time four-wheel drive. There are kits available that will disengage the differential from the transfer case, but I've heard mixed reviews on how well they work. You...
Hard clunk noise shifting/downshifting in 2nd & 3rd
Hello there, thank you for asking about your 2006 GMC Sierra 1500HD. Since you say it only happens when shifting between 2nd and 3rd, my guess is that the noise is internal to the transmission. A faulty shift solenoid could...
Speedometer stuck at 120 mph and 4WD not functioning
Hey there. It may help to find the fuse for the instrument cluster, remove it for 10 minutes or so, then re-insert the fuse. Chevrolet appears to have had a "customer goodwill" repair available for this if your vehicle had...
Gear independently shifted into neutral - 2005 Chevrolet Suburban
This sounds like it could be a transmission control issue. Faults codes should be read out and any issues corrected. Generally, if there is a mechanical condition in a transmission the symptoms will be static and always present where an...
If all four of my tires turn while the car is in the air, what's causing it not to work when I drive it on the road?
Hi there, thanks for writing in. Before an issue like this can be properly diagnosed, the vehicle would need to be lifted off the ground and have all four wheels in the air. Then the vehicle would need to be...
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...
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...
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...

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