What is the reason why the differential lock cannot be turned off?

3 Answers
ReedLee
07/28/25 2:36pm
It may be due to air leakage in the differential lock's air tube. Here are the relevant explanations: 1. Differential: A conventional differential allows the left and right wheels to rotate at different speeds, but when one wheel spins freely, the other wheel on good road surface also fails to receive torque, causing the vehicle to lose driving power. In this situation, the differential does not function. By locking the two wheels together, power can at least be transmitted to the other wheel, enabling the vehicle to regain driving power and escape the predicament. 2. Working principle of the inter-wheel differential: When the vehicle is moving straight, the driven bevel gear of the main reducer drives the differential case to rotate. The differential then drives the planetary gear shaft to rotate, which in turn drives the planetary gears to revolve. The side gears, held by the planetary gears, rotate at the same speed and direction. At this point, the planetary gears only revolve without rotating on their own, and the speed of the left and right wheels equals the speed of the driven bevel gear.
Was this review help?
17
0
Share
Marian
08/11/25 7:06pm
I've encountered the situation where the differential lock won't disengage several times, especially after off-roading when the wheels are packed with mud. Mud and sand can get inside and jam the mechanical locking mechanism, preventing it from moving. Insufficient lubrication can also cause the spring not to return or internal components to rust, wear, or break, which is another common reason. Additionally, if the weather is cold and the oil viscosity increases, the locking device may move sluggishly. Debris or foreign objects inside the differential can also cause jamming. If not addressed promptly, this situation can lead to increased wear in the drivetrain, louder noises, or even loss of vehicle control during turns. It's recommended to thoroughly clean the chassis after each off-road trip and regularly check the differential lock's lubrication. If necessary, use a specialized cleaner to flush it out. If it gets stuck, don't force it—safety first. Seek professional repair to avoid greater damage.
Was this review help?
19
5
Share
Expand All
LeAdrian
09/29/25 3:54am
If the electronic differential lock can't be turned off, it's mostly due to issues in the electrical system. For example, the button switch might be broken and stuck in the on position, or aging wires could cause short circuits leading to signal errors. The relay might fail, keeping the lock engaged and unable to release. Additionally, the control module (ECU) could receive interference from bumps or have software bugs. This is related to the vehicle's design, and some off-road vehicles are prone to such faults after severe vibrations. It's recommended to try restarting the system after parking. If that doesn't work, use an OBD scanner to check for fault codes and see if the sensor signals are disrupted. Many people install additional electrical equipment without authorization, which can interfere with signals and prevent the lock from disengaging. Regularly inspect the wiring, especially in humid environments, to prevent water from seeping into junction boxes. The electronic control system is quite delicate, so keeping it dry and clean during maintenance can help reduce issues.
Was this review help?
16
4
Share
Expand All
More Forum Discussions

What are the penalties for removing rear seats from a 7-seater van?

7-seater vans with removed rear seats will be penalized with 3 demerit points, a fine, and ordered to rectify the issue. Additional information: 1. Article 31 of the "Road Transport Regulations" stipulates: Vehicles that are scrapped, illegally modified, or otherwise non-compliant with national standards shall not be used for road transport operations; 2. Article 71 of the "Road Transport Regulations" states: Passenger or freight transport operators who illegally modify vehicles with valid operating permits shall be ordered to rectify by road transport management authorities at or above the county level and fined between 5,000 and 20,000 yuan; 3. Removing rear seats from a 7-seater vehicle for passenger transport, exceeding 20% of the rated capacity, results in 3 demerit points and a fine.
19
5
Share

How to Connect Wireless CarPlay in a Car?

Open the Settings icon on your phone, then enter the Settings interface and select the General option. Enter the General Settings interface, then proceed to the CarPlay interface where there are two connection methods.
8
5
Share

What are some methods for beginners to distinguish between the accelerator and brake when driving?

Here is a detailed introduction to methods for beginners to distinguish between the accelerator and brake: 1. Automatic transmission models: The leftmost pedal is the brake, and the rightmost is the accelerator. Automatic transmission models do not require manual gear shifting, as the car shifts gears automatically, so there is no clutch pedal—only the accelerator and brake, both controlled by the right foot. During driving, the left foot should not rest on the brake pedal. 2. Manual transmission models: The middle pedal is the brake, and the rightmost is the accelerator. Manual transmission models have three pedals, arranged from left to right as follows: clutch pedal, brake pedal, and accelerator pedal. For manual transmission models, the left foot should only be used to press the clutch pedal when shifting gears; during normal driving, the left foot should not rest on any pedal. Both the brake and accelerator are controlled by the right foot.
14
1
Share

What Causes Car Shaking After Cleaning the Throttle Body?

Car shaking after cleaning the throttle body is due to the failure to perform idle speed reset learning after the cleaning process, which can lead to symptoms such as shaking, unstable idle speed, difficulty starting, and easy stalling. Below are specific details about the car throttle body: 1. Dirty throttle body causing idle speed shaking: When the air conditioning is turned on, the compressor also operates. Since the compressor is driven by the engine, its operation increases the engine load, which in turn increases the throttle opening and air intake. If the throttle body is not maintained for a long time, carbon deposits can easily form, obstructing the engine's air intake. This makes it difficult for the engine to drive the compressor, resulting in idle speed shaking. 2. Regular cleaning of the throttle body: If driving conditions are harsh, it is advisable to clean the throttle body regularly, recommended every 10,000 kilometers.
2
3
Share

Can a motorcycle still undergo annual inspection after 3 years without it?

Motorcycles that have not undergone annual inspection for three years can still be inspected, but will be subject to a fine and 3 demerit points. Additional information: 1. Article 56, Item 4 of the "Regulations on the Registration of Motor Vehicles" stipulates that in any of the following circumstances, the traffic management department of the public security organ shall issue a warning or impose a fine: Motor vehicles that fail to undergo safety technical inspection within the prescribed time limit. 2. Article 3, Item 12 of the "Scoring Standards for Road Traffic Safety Violations" stipulates that if a motor vehicle driver commits any of the following violations, 3 points will be deducted: Motor vehicles driven on the road fail to undergo regular safety technical inspections as required.
19
5
Share

Is it mandatory to display a probationary sign during the probationary period?

It is mandatory to display a probationary sign during the probationary period. Below are the precautions to be taken during the driver's license probationary period: 1. Highway driving requires accompaniment: Probationary drivers are not allowed to drive on highways alone. If a probationary driver operates a motor vehicle on a highway during the probationary period, they must be accompanied by a driver who has held a driver's license for the same or a higher class of vehicle for more than three years. The accompanying driver should sit in the front passenger seat to provide guidance. Failure to have an accompanying driver or if the accompanying driver does not meet the requirements will result in a fine. 2. Display a probationary sign: It is mandatory to display a probationary sign while driving during the probationary period. If borrowing or renting a car during the probationary period, the probationary sign must also be displayed as required by regulations. Driving without the sign is not permitted. 3. Accumulating 12 penalty points: Accumulating 12 penalty points requires retaking the driving test. If a probationary driver accumulates 12 penalty points during the probationary period, their driver's license will be revoked, and they will need to reapply and retake the tests for subjects one, two, and three from the beginning.
8
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.