The FWD/AWD vehicles do use differential braking to do torque vectoring, but I think the trucks still use traditional clutch-type limited slip diffs. I think it's probably more the stability/trailer sway control (which does use differential braking) that's evening out the pad wear; on the 1st Gen Lincoln LS, it wasn't uncommon for the rear pads to wear out before the fronts because AdvanceTrac used differential braking on the rear brakes to control yaw and traction.I think that the new positive traction rear ends are no longer clutch supported, but controlled by the computer. As a wheel loses traction the computer adds brake to the side not needing traction to transfer traction to the side needing it.
I think I have that right?
The tow package also uses rear braking to help when trailer sway becomes an issue. Once again If I'm reading right, it uses the rear brakes to accomplish that.
Some of you Mechanics out there probably have much more intel than myself on this.