I can confirm as of this weekend that the traction control is not calibrated well enough to actually transfer power from side to side in any 4wd setting if one or more wheels is on ice and the other is on dry ground... Consider this my first regret with my Ram, no anti spin or elocker on my truck. My Tundra was an open rear diff as well (they don't offer any mechanical limited slip or locker at all on those trucks), but in any 4wd mode, the traction control would clamp down on the spinning wheel and the entire truck would move if only one wheel had traction. It was even calibrated differently for 4Lo so that it could take advantage of the additional wheel torque. With the Ram, gas pedal is throttled down to barely above idle once it senses any wheel slip, not allowing enough wheel spin to be useful when applying the brakes on one side of the truck to shift torque to the other side. It was seriously disappointing. If you turn off the stability control, obviously the traction control goes away with that too, further not helping the situation.