Skid Steering
There are times when it could be really helpful. Any thoughts?
If you lock one rear wheel, the other wheel will keep tracking like it should and your truck will act exactly as it does without one wheel locked, with the exception of removing lots of expensive rubber from the offending wheel. The front end would have to slide sideways in order for your idea to work, which would NOT happen in this scenario.
The only way a skid-steer type of setup could work would be if the front and rear wheels could slide across the ground at the same time. For example, if you locked the front and rear wheel on one side and applied power with the other two wheels. The problem here is that it would only work on an extremely short wheelbase vehicle, much like the skid steer loaders currently out there. It would NOT work on a pickup truck, especially something as heavy as an SD.
This is also the type of thing that would destroy your driveline. Ever wonder why you're not supposed to use 4x4 on dry pavement? To prevent the driveline from forcing the wheels to skid. You'd trash your driveline and suspension by even trying something like this.
What would be best is what GM offered as their Quadrasteer option where in tight spaces at low speeds the rear axle actually turned in the opposite direction to the front tires. Worked very well from what I understand but I'm not sure if they are still offering it.









