As far as I know it is the original torque tube driveshaft & rear end. It is a Posi. I'm assuming that the torque forces were divided between the two wheels & when the one stopped the other sped up to carry the load. Also found that the passenger rear had a sticking wheel cylinder. That is now fixed & the brakes are AWESOME! Good to know that the suicide MC is gone & some brakes will be there even if half of the system fails.
