Ten Stupid Things
men do to mess up their 4WD





Here is why part time 4WD should never be used on dry pavement:

Eventually you will break parts - expensive parts.

All caused by driveline windup

broken transfer case due to drive line bind - axle wind up - driveline

The terms used differ from driveline wind up to axle bind and drive line bind, binding hubs, etc. - they relate to stress created by the use of part time 4 wheel drive on dry pavement. Fact is, that you can not use part time 4WD on dry high traction surfaces. Period. You'll get drive line windup. This has been known since the invention of 4WD more than 100 years ago and center differentials have been employed since then to correct the problem. Here is more about how it occurs.

Unfortunately many owners of part time 4WD vehicles don't know yet.

Then there are some "smart" guys claiming their truck being strong enough to handle driving on dry pavement with part time 4WD and the resulting driveline windup/bind. And it is true, some trucks are stronger than others - they break later than the weaker ones.

If you know about the stresses created by part time 4WD on pavement, you should never expose your truck/car to that kind of abuse.

The extreme tensions and pressures caused by the absence of a center differential (or caused by a center diff that has been locked) will break down the protective properties of all lubricants, eventually leading to expensive component failure.

The image above is the transfer case of my Jeep Grand Cherokee after accidentally driving for about 150 miles in part time 4WD on the freeway. It exploded at about 70 mph.

Here is why you get drive line windup in part time 4WD

and why full time 4WD does not get driveline wind up on pavement

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Copyright © 2002-2012
Harald Pietschmann

Binding of drive shafts and axles in part time 4WD systems, also called "axle wind up"different, wheel,speed,differentials,binding,drive shaft,wind up,speeds,windup,center differential,traction,