What is the Difference Between Full-Time 4WD and Part-Time 4WD?

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Full-time 4WD and part-time 4WD differ in terms of vehicle applications and mode switching. Below is a detailed introduction to these two types: Vehicle Applications: Part-time 4WD typically refers to vehicles with a manual transfer case, most of which are equipped with solid front and rear axles. These vehicles feature manual operation, simple structure, high reliability, and ease of installing rear differential locks or front hub locks. Full-time 4WD is commonly used in urban SUVs, offering a balance between operational convenience and cost among various 4WD systems. These systems usually have a transverse front engine, a driveshaft leading to the rear axle, and a multi-plate clutch for power transfer to the rear differential. Normally operating in front-wheel drive, the system automatically engages the clutch to activate rear-wheel drive when wheel slippage is detected by the computer. Mode Switching: Full-time 4WD: Primarily operates in two-wheel drive mode and automatically switches to four-wheel drive when necessary. Part-time 4WD system requires manual switching between two-wheel drive, high-range four-wheel drive, and low-range four-wheel drive modes.