What exactly is the difference between 4 wheel and all wheel drive??
Answers: ALL WHEEL DRIVE:
Definition: A vehicle where all four wheels are driven, but there's no transfer case like a four-wheel drive rig. Most AWD setups are full time systems for year-round driving, and use a viscous fluid coupling center differential instead of a transfer case to route drive torque to all four wheels. This allows the front and rear wheels to turn at slightly different speeds when turning on dry pavement. Most folks do not consider this the same as four-wheel drive. It can be useful (and more fuel economical) in pavement driving where you're mainly negotiating bad weather conditions.
FOUR WHEEL DRIVE
Definition: A method of driving a vehicle by applying engine torque to all four wheels thru the use of a transfer case, differentials and hubs. Various schemes are used for 4WD including part-time, full-time and variable four-wheel drive. To help cut the drive train drag (and reduced fuel economy) that most 4WD's have, a transfer case is included that allows the driver to select either two- or four-wheel drive depending on driving conditions. Some performance cars have full-time variable four-wheel drive and use a computer-controlled transfer case to route power between the wheels.
It's important to note that even in 4WD, you still have only two driving wheels; one front; one rear. A normal passenger car is essentially one wheel drive, because the other one can slip. So a 4WD rig, with the front axle engaged, now has two wheels driving. Then if you add a locker to the rear, you've added one more wheel, to make your rig three-wheel drive. Add a locker to the front, so no tires can spin, and you have TRUE, 4-wheel drive, all four wheels driving.
All wheel drive is usually always on, as in you can't disable it.
However, 4 wheel drive, usually has a 2 wheel drive feature.
the first guy just sum it up for you.
Stability control.
With a 4 wheel drive system you have your drive axle (rear) and a transfer case that provides the ability to either have your vehicle in 4 wheel drive all the time or just part of the time. Each set of wheels spinning at a constant rate.
With all wheel drive, each wheel senses differences in road terrains and helps you maintain a better stability.
There is no difference between 4 wheel and all wheel drive it's just a different way to say eachother.
The best way I can explain it is 4 wheel drive you can switch from 4 wheel to 2 wheel.All wheel drive is the traction force is split between the wheels depending on where traction is needed.All the wheels drive all the time.
most all wheel drive systems arent all wheel drive all the time they put the power to the tires that need it most and when your cruising in a subaru it generally is oly powereing two of the 4 wheels till it senses it needs power else where
Four Wheel Drive is have a limited slip differential in the front AND back of the vehicle.
All Wheel Drive adds a differential between the front and rear wheels. It allows the front and rear to turn (linear speed, not directional) at different speeds.
A 4X4 system has the front and rear turning at the same speed, so is worse on pavement.
2 pts
Definition: A vehicle where all four wheels are driven, but there's no transfer case like a four-wheel drive rig. Most AWD setups are full time systems for year-round driving, and use a viscous fluid coupling center differential instead of a transfer case to route drive torque to all four wheels. This allows the front and rear wheels to turn at slightly different speeds when turning on dry pavement. Most folks do not consider this the same as four-wheel drive. It can be useful (and more fuel economical) in pavement driving where you're mainly negotiating bad weather conditions.
FOUR WHEEL DRIVE
Definition: A method of driving a vehicle by applying engine torque to all four wheels thru the use of a transfer case, differentials and hubs. Various schemes are used for 4WD including part-time, full-time and variable four-wheel drive. To help cut the drive train drag (and reduced fuel economy) that most 4WD's have, a transfer case is included that allows the driver to select either two- or four-wheel drive depending on driving conditions. Some performance cars have full-time variable four-wheel drive and use a computer-controlled transfer case to route power between the wheels.
It's important to note that even in 4WD, you still have only two driving wheels; one front; one rear. A normal passenger car is essentially one wheel drive, because the other one can slip. So a 4WD rig, with the front axle engaged, now has two wheels driving. Then if you add a locker to the rear, you've added one more wheel, to make your rig three-wheel drive. Add a locker to the front, so no tires can spin, and you have TRUE, 4-wheel drive, all four wheels driving.
All wheel drive is usually always on, as in you can't disable it.
However, 4 wheel drive, usually has a 2 wheel drive feature.
the first guy just sum it up for you.
Stability control.
With a 4 wheel drive system you have your drive axle (rear) and a transfer case that provides the ability to either have your vehicle in 4 wheel drive all the time or just part of the time. Each set of wheels spinning at a constant rate.
With all wheel drive, each wheel senses differences in road terrains and helps you maintain a better stability.
There is no difference between 4 wheel and all wheel drive it's just a different way to say eachother.
The best way I can explain it is 4 wheel drive you can switch from 4 wheel to 2 wheel.All wheel drive is the traction force is split between the wheels depending on where traction is needed.All the wheels drive all the time.
most all wheel drive systems arent all wheel drive all the time they put the power to the tires that need it most and when your cruising in a subaru it generally is oly powereing two of the 4 wheels till it senses it needs power else where
Four Wheel Drive is have a limited slip differential in the front AND back of the vehicle.
All Wheel Drive adds a differential between the front and rear wheels. It allows the front and rear to turn (linear speed, not directional) at different speeds.
A 4X4 system has the front and rear turning at the same speed, so is worse on pavement.
2 pts
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