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Originally Posted by mchinna
Thanks for the post. two questions:
I was not able to disengage from 4WD H to 2WD unless I stopped first and put it in park. Has that been everyone's experience? Could I have been doing something wrong?
The second question relates to over and understeer. I thought oversteer would tend to cause a roll-ever and icy conditions would cause understeer? Since this is my first truck, is there some difference with trucks in this respect?
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For your first question: If you were doing this on dry pavement you may have been binding the transfer case making it hard to disengage 4WD. If you are on ice, snow, gravel etc. then you should be able to shift back and forth between 2WD and 4WD while moving.
For your second question: Understeer simply means that the vehicle is not turning as much as the steering input (you turn the wheel and the vehilcle keeps going straight or turns very litttle). Oversteer is the opposite, the back end of the vehicle slides out resulting in more turning (rotation) than the steering input.
Both understeer and oversteer can happen on any road surface depending on which end of the vehicle (front tires or rear tires) loses traction first. This can be a factor of throttle input, suspension set up, sway bars and other factors.
JD