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2007 Mitsubishi Outlander 4WD System Explained
All-Wheel Control with Advanced 4-Wheel Drive
The 2007 Outlander gives the driver a choice among vehicle drive modes. Standard front-wheel drive is augmented by the Active Skid and Traction Control (ASTC) system, which includes traction control for better grip on slippery surfaces.
With the optional 4-wheel drive system, the driver uses a drive-mode dial on the center console to select "FWD" for best fuel economy; with "4WD Auto" mode selected, the system uses a rear-mounted electronically controlled transfer clutch to automatically and seamlessly route more power to the rear wheels, depending on driving and road surface conditions. The driver can freely change the drive mode at any time.
Two 4WD Modes
When "4WD Auto" mode is selected, the Outlander 4WD system always sends some power to the rear wheels, automatically increasing the amount under full-throttle acceleration. The coupling transfers up to 40 percent of available torque to the rear wheels under full-throttle acceleration, and this is reduced to 25 percent over 40 mph. At steady cruising speeds, up to 15 percent of available torque is sent to the rear wheels. At low speeds through tight corners, coupling torque is reduced, providing a smoother feel through the corner.
For driving in particularly challenging conditions, such as snow, the driver can select "4WD Lock" mode. In Lock mode, the system still apportions front and rear torque automatically, but enables greater power transfer to the rear wheels. For example, when accelerating on an upgrade, the coupling will transfer more torque to the rear wheels immediately, helping to ensure that all four wheels get traction. In contrast, an automatic on-demand part-time system would allow front wheel slippage before transferring power, which could hamper acceleration.
In dry conditions, 4WD Lock mode places priority on performance. More torque is directed to the rear wheels than in 4WD Auto mode to provide greater power off the line, better control when accelerating on snowy or loose surfaces, and enhanced stability at high speeds. Rear wheel torque transfer is increased by 50 percent over the amounts in 4WD Auto mode - meaning up to 60 percent of available torque is sent to the rear wheels under full-throttle acceleration on dry pavement. When in 4WD Lock mode, torque at the rear wheels is reduced by a smaller degree through corners than with 4WD Auto mode.
Drive Mode: 2WD
Overview of Control: Distributes all torque to front wheels
Benefit: Best fuel economy
Drive Mode: 4WD Auto
Overview of Control: Distributes variable torque to rear wheels depending on accelerator pedal position and front-to-rear wheel speed difference
Benefit: Delivers the optimal amount of torque for driving conditions
Drive Mode: 4WD Lock
Overview of Control: Delivers 1.5 times more torque to the rear wheels than 4WD mode
Benefit: Increases off-the-line traction; provides greater high-speed stability and best performance on rough or slippery surfaces.