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What are the differences between part-time four-wheel drive and on-demand four-wheel drive?

1 Answers

TaylorLynn

07/30/25 8:23am

Here are the differences between part-time four-wheel drive and on-demand four-wheel drive: 1. Different vehicle applications: Part-time four-wheel drive mainly refers to vehicles with manual transfer cases. These vehicles are typically equipped with solid front and rear axles, feature manual operation, have simple structures with high reliability, and are convenient for installing rear differential locks or front hub locks. On-demand four-wheel drive is adopted by most urban SUVs, striking a balance between operational convenience and cost among various four-wheel-drive systems. They generally have transversely mounted front engines, with a driveshaft leading to the rear axle. Power is transmitted through a multi-plate clutch at the rear differential and front tandem. Normally operating as front-wheel drive, the computer automatically engages the clutch to activate rear-wheel drive when wheel slippage is detected. 2. Different mode switching: On-demand four-wheel drive primarily operates in two-wheel-drive mode and automatically switches to four-wheel-drive mode when necessary. The part-time four-wheel-drive system requires manual switching between two-wheel drive, high-range four-wheel drive, and low-range four-wheel drive modes.

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