The invention of four wheel drive has no recorded date that I can find. The first name I remember is Jeep. What about you?.
The four wheel drive was used in the war world two and used by the military, because the four wheel drive car was designed to be driven on all terrain. Been an ex-Air Force men my self I know the feeling of driving one. Today the phrase the four wheel drive is synonymous with success adventure and living. All of these comes branded and package to entice the men on street .i.e ( Jeep, Nissan, Bmw, Audi, VW, Mercedes, Hummer, Ford, Subaru, Toyota, Range Rover, Land Rover) and many others. Who doesn’t want to drive one of this brand four wheel drive.
What Are Difference Between Two Wheel Drive And Four wheel Drive ?
The two wheel drive are cars in which only two wheels receive the power from the engine. On the other hand four wheel drive receive the power from the engine for all four wheels at same time. Hands the varied names cars .i.e. four wheel drive, all 4 wheel drive, or 4×4. The phrase 4×4 is self explaintory.
The four wheel drive has system to direct power to all four wheels. On four wheel drive is an add-on system that works in conjunction with two wheel drive components.
The Transfer Case 4×4
The latest vehicles are equipped with transfer case, is attached directly to the rear of the transmission. The transfer case function is to transmits the drive power to both, the front and rear differentials though two other drive shafts front and the rear.
The front differential is mounted below the engine and connected to the front wheels by two drive-axles which turn the wheels when your car is in the four wheel drive mode.
There free running hubs are used when are unlocked allow the front wheels to spin while your vehicle is in the two wheel drive mode without rotating the drive-axles and the front differentials, thus reducing wear in these components.
When your car is switched to the four wheel mode, the hubs should then be locked to engage the wheels with the drive axles. The new models cars today comes with an automatic-locking front hubs, eliminating the need to jump out and manually lock the hubs when the transfer case is engaged in four wheel drive mode. Is no difference between the rear differential and the axle assembly you can find in the two rear wheel drive.
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