Here's another something I posted in an earlier thread:
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Originally Posted by Bluto
I don't like the thought of having the brakes work against the engine.
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The brakes aren't working against the engine. They're working *with* the differential.
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Originally Posted by Bluto
Brakes aren't designed to clamp and transfer torque, especially 380 ft-lbs. The brakes will lose. They are for stopping vehicles.
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The brakes will definitely not lose. They are specifically designed to clamp, which, due to their mounting location, means they're specifically designed to stop rotation of the tire/wheel. Without ABS, you'd be able to lock up the wheels anytime you wanted to. Brakes that size have the clamping force necessary.
You're correct in saying that the braking system is not designed to transfer torque... but that's not what's happening. The braking system (as it's used by ABLS) simply gives the wheel some resistance to turning - allowing torque to be generated - and that allows the open differential to deliver torque to the other side.
Take an extreme case - right rear wheel up in the air spinning free, left rear wheel on the ground. RR wheel has zero traction (there is nothing for it to push against), therefore, due to the open differential, zero torque is generated in the rear.
Thanks to the open differential and one wheel having zero traction, the truck is stuck.
Enter ABLS.
ABLS clamps the RR brake caliper shut (it'll never actually go this far - I'm just giving an extreme example). The RR wheel now has effectively infinite traction - allowing infinite torque to be generated and distributed equally to both sides. This allows the torque necessary to move the truck to be delivered to the LR wheel. Truck not stuck.