It's ABLS (Active Brake Limited Slip). It uses the ABS sensors at each wheel to detect slip, brake the slipping wheel, and send power to the opposite wheel. On 4WD models, we have that both front and back. I find it to work fine in snow but it's not gonna get you two black lines because the Titans power easily overpowers the brakes and you'll just get a flashing SLIP light. So basically it's an open diff with some electronics involved. The fact that it does LIMIT slip to some extent is how they get away with calling it a limited slip rear. That's a generic term, not a brand.c1971tra said: