# Automotive How rear axle turns? (in cars)

1. May 27, 2012

### persia7

in cars front axle turns by diffrential but how rear axle turns it is possible wite pure rolling?

2. May 27, 2012

### Danger

Welcome to PF, Persia7.
You sort of lost me with that question. The rear wheels are turned by a differential, unless you have a front-wheel-drive vehicle. The front ones just free-wheel, unless the brakes are applied. The opposite is true for a FWD thing.

3. May 27, 2012

### persia7

when two wheels are rigid to axle ,how axle can turn without slip?

4. May 27, 2012

### brewnog

It can't. This is why a differential arrangement is used, so both driven wheels can transmit power at different speeds.

Check out the 'how stuff works' article on the same, or build one out of Lego to understand better.

http://www.howstuffworks.com/differential.htm

5. May 27, 2012

### persia7

in front wheel drive cars ,rear axle havent diffrrential , how it can turn?

6. May 27, 2012

### persia7

cart havent diffrential but how it can turn in corner?

7. May 27, 2012

### Ranger Mike

welcome persia
on front wheel drive cars, the rear wheels are simply wheels on bearings abd are free to rotate independatly of the drive wheels. They are just along for the ride..savvy?

8. May 27, 2012

### persia7

if front axle need diffrential to turn (in corner) then why rear wheels doesnt?

9. May 27, 2012

### Ranger Mike

the front wheels must transmit power to the road..since rear wheels are not connected to engine..no differential is required..only independant bearings

10. May 27, 2012

### persia7

please explain what force and how cause rear axle turns in corners ??

11. May 27, 2012

### Danger

This is like talking to a rock, but I'm going to assume that it's an "English as 2nd language" problem.
Okay... get yourself a Hot Wheels or Matchbook toy car and check out how the wheels turn. Now imagine a differential on one end of it. That's what we're talking about. Ignore the fact that they don't have steering mechanisms; it's irrelevant here.

12. May 27, 2012

### Averagesupernova

Front wheel drive vehicles have a differential as part of the transaxle. The rear wheels on a front wheel drive vehicle are not locked the same axle. Each one can free-wheel independent of the other.
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Rear wheel drive vehicles have a differential in the center of the rear axle. The front wheels on a rear wheel drive vehicle are obviously not locked to the same axle. If they were, steering would be impossible. -
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There, I tried.

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