Help for a \"gear noobie\"!? Hey, everyone, I'm pretty new to the gearing segment of truck building. I know you guys can help me out on some basic questions. How can one tell if there are lockers in a differential? If there are, do they only lock while in 4 wheel, or, for example, if there was a locker in the rear diff, would that axle be locked all the time? The reason I'm asking- on slick stuff like ice/snow, if I'm in 2 wheel drive, pretty much just one tire will spin. When I put it in 4 wheel drive, all tires grip very well. I know that if the front axle is locked up, you can definately tell when turning a corner. Does the same apply for the rear diff (any bounciness, etc.)? Thanks in advance!