Re: OT - True four-wheel drive on truck

Posted by 135 Fan on February 28, 2007 at 15:30:01 from (68.149.46.121):

In Reply to: OT - True four-wheel drive on truck posted by CB in central NY on February 28, 2007 at 10:14:51:

A skid steer is true four wheel drive. Most vehicles with 4 wheel drive come with a limited slip rear differential. Posi is the GM name for limited slip. It is not a locker. It allows the wheel with the most traction to turn rather than a regular diff. that lets the one with the least traction spin. Some people with Hot rods will weld up the spider gear to make a solid axle. On dry ground a locker or solid axle will skid the inside tire when turning sharp. Detroit lockers are probably the most common. The front diff. has a lot more problems with putting a locking diff. on because each wheel has to be able to turn very sharp. Take a two wheel drive tractor with differential lock engaged and try to turn. No matter how hard you turn the wheel you keep going in a straight line. Now imagine a vehicle with locking diffs. front and rear. I've seen a lot of people with 4 wheel drives that figure they can go anywhere. They can't but do get stuck pretty bad trying. A lot of people seem to think a 4 wheel drive will stop a lot faster too. It won't. In fact it might take longer to stop because of the extra weight. 4 wheel or all wheel drive on a vehicle is a really misleading statement. It just means that all 4 wheels can get power but not necessarily at the same time. Hope this clarifies it for you. Dave

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