Automobile Engineering in ME
The gear shift lever requires two separate motions to shift gears, and the first movement

Moves the synchronizer
Selects the synchronizer
Meshes the gears
Operates the clutch

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Automobile Engineering in ME
The basic purpose of a four wheel drive (4WD) system is that it

Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces
Eliminates the need of snow tyres, tyre chains, etc.
Ensures that effective braking can be performed, even on slippery surfaces
Delivers improved cornering on dry road surfaces

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