The brake lock system might do a better job on snow\/ice. The mechanical LSD might not function very well under extreme cold and low traction conditions ... especially if the lubricant was gummy and sticky. The clutches might fail to engage when needed or they might tend to stay engaged. The brake lock system reads wheel speed directly, and ought to function well under very low traction conditions and ought to be immune to cold. It can control wheel spin on all four wheels, or any of them, front ot rear, not just the rear ones.\n\n\nInteresting, thanks for weighing in. Appreciate the info.