Your explanations are really helpful and I love Brown's website. Some things I can get right away but this one I had to work at. I have a rear limited slip differential and I thnk I got it now.
One more question (really two), and I am afraid to ask - (1) how does front-wheel drive figure in to a locker discussion - does it? I drove a Nissan Sentra front-wheel-drive for years (until I got the Jeep) and it was very good in the rain and especially in the snow, but this was on paved roads. Jeeps generally don't have front wheel drive. (2) I assume front wheel drive is less effective on trails than 4wd but better than rear 2wd? (And I hope you're not thinking, If she could ask this, she doesn't get it.)