What Are the Taboos of Part-Time Four-Wheel Drive?
2 Answers
The taboos of part-time four-wheel drive are that the four-wheel drive mode should not be used on paved roads with good traction and high friction; on non-paved roads with low friction, such as slippery roads on rainy or snowy days, muddy mountain roads, or sandy terrain, the four-wheel drive mode should be activated. Advantages of part-time four-wheel drive: The advantage is that part-time four-wheel drive technology is very mature, the structure is relatively simple, and the reliability is good. Additionally, since it does not require the installation of a central differential lock, the cost is much lower than that of full-time four-wheel drive. Definition of part-time four-wheel drive: Part-time four-wheel drive is a four-wheel drive system where the driver can manually choose between two-wheel drive and four-wheel drive. The driver can switch between two-wheel drive and four-wheel drive modes by engaging or disengaging the transfer case based on road conditions.
I've found that the most important thing to avoid when using part-time 4WD is driving it recklessly on dry asphalt roads or highways, which is quite common in real life. Having driven SUVs for several years, I've personally experienced how this forces the front and rear wheels to rotate synchronously, causing the drivetrain to creak, wear out quickly, and potentially even destroy the transfer case. Another mistake is forgetting to turn off 4WD on paved roads, such as not switching back after exiting the highway, which leads to cumulative damage to components over time. For safety's sake, I only engage 4WD when truly needed—on muddy, snowy, or sandy roads—and stick to 2WD mode for everyday driving to save both trouble and the vehicle. Regularly checking the mode selector switch and driveshaft condition is also crucial for maintaining long-term durability.
