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[TheLoneRanger]

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The "wheel hop" you are feeling is caused by the u-joints. The u-joints have a limited angle of operation.

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Wrong again.

The wheel hop is because there is no differential between the front and rear wheels. The front wheels travel a longer distance than the rear wheels when turning. If all the tires have traction, something has to give. One or more tires will slip or something will break, like a u-joint. That's why you should not use four wheel drive on good traction surfaces.

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I need to clarify...What I was referring to was during 2wd operation with the front hubs still locked in. My bad. Now that I've completely muddied the water...let me try again...

With the transfer case in 2wd..."wheel hop" in the front is caused by the u-joints being turned past their normal operation angle.

With the transfer case in 4wd...on a dry surface you will get "wheel hop" because the front and rear wheels are trying to roll at the same speed but the rear wheels have less ground to cover because they are "cheating".

With the transfer case in 4wd...on a wet/slippery surface you will get "wheel hop" or a jerky front end when you turn too tight.

In all of these cases be careful because you can cause serious damage to your vehicle.