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The “Service 4WD System” message indicates a problem with the 4WD system that should be properly diagnosed and repaired. When the ignition key is turned from OFF-RUN-START and is released back to the RUN position after the vehicle starts, the 4WD warning light should go on for 1 to 2 seconds and then go out.
Can you drive with the service 4WD light on?
When the 4WD light appears, it is letting you know that there is an issue with the 4WD system and it must be handled promptly. If you believe you have shifted into gear properly but the light is still on, get to a professional mechanic as soon as possible, as this may indicate a transmission issue.
Do you need to service 4-wheel drive?
4-wheel drives need more maintenance because of the extra parts and the chassis can take a beating over time due to neglect or hard driving. If you are buying a used 4-wheel drive, let our technicians check it for cracks where the chassis outriggers join the main frame or rust, which indicates rough use.
How often should I service my 4WD?
The service interval for most 4WD’s is 10,000 – 15,000 km. However, a lot of manuals suggest that you make this more frequent if you are towing or working your vehicle hard. You also may need to bring your next scheduled service forward if you’ve been on a short but very dusty trip.
What does it mean when it says service four wheel drive on a 2008 Chevy Silverado?
When the trouble codes are stored and the Service 4 Wheel Drive Message is displayed, the transfer case is inoperative for the rest of that particular key cycle. The codes and message may also be set during normal driving conditions in Auto 4WD, 4HI or 4LO.
What does service 4WD mean on GMC Yukon?
The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.
What does it mean when the 4×4 light flashes?
A lot of the time, a flashing 4WD light is no reason to be alarmed, because it simply means that the system is working as designed. On vehicles where four-wheel drive is only activated on demand — that is to say, when traction conditions require it — this light shows up to tell you that it’s been activated.
How often should you change all wheel drive fluid?
4-Wheel and All-Wheel Drive vehicles should have their transfer case fluid replaced every 30,000 miles to keep the small gears and moving parts lubricated and working properly.
How much does a transfer case fluid change cost?
Changing the transfer case fluid costs form $75 to $160 in a repair shop. The transfer case should also be checked regularly for leaks. Leaks should be repaired as soon as possible.
How often should a transfer case be serviced?
When these parts become impaired, the gears inside can lock up (not good), causing the wheels to seize up (really not good). You should have your differential and transfer case fluid checked every 30,000 miles, or when you experience any of the symptoms below.
What would cause my 4 wheel drive not to work?
An electrical fault such as a corroded wire or faulty 4WD dial/switch, A component failure such as a faulty transfer case module or actuator. A seized differential caused by poor lubrication. A leak in the vacuum hoses (older traditional 4WD systems).
Are 4 wheel drive cars more expensive to maintain?
Four-wheel drive vehicles are more expensive to maintain on average than front-wheel or rear-wheel drive vehicles because of the additional prop shaft, diff and transfer case as well as the mechanism to engage the 4 wheels.
What is a transfer case service?
The transfer case is a mechanical component in all four-wheel-drive and all-wheel-drive vehicles. It distributes engine power from the transmission to the front and rear drive shafts, acting as a differential between the front and rear wheels.
What does it mean when my suburban Says Service 4 wheel drive?
Problem Description The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.
How do I reset my 4×4 control module?
Cheap way – To clear the codes and reset the computer, pull the 5 amp TCCM fuse, located at the bottom of the fuse box. Wait at least a half hour, and then replace the fuse. Turn the ignition key to run, wait for the 4×4 lights to blink, and then turn off. Repeat 5 times, and then start the truck.
How do you reset the service indicator on a Jeep Grand Cherokee 4WD?
Resetting 4WD Service Required Message Put the ignition to “On”, but don’t start the vehicle yet. Hold down the gas pedal with your feet 3 times. Turn off the ignition and start the vehicle after 10 seconds.
What RPO code is transfer case?
Look for the RPO code on your build sheet,or in your glovebox at the SPID label. If you have RPO code “NP1” you have the NP263 transfer case. If you have RPO code “NP8” you have the NVG246 transfer case.
What does the transfer case switch do?
A transfer case switch plays a key role in your vehicle’s transfer case assembly. It allows you to switch between two-wheel and four-wheel drive settings. It can be found in vehicles that have electrically or mechanically operated transfer case assemblies.
