Looks like you need to fix a few leaks but the main problem is the torque tube bushing and seal.lots of information about this on this site .The best and easiest would be to install a oakie bushing in your torque tube .The oil leaking causes the axle seals to leak messing up your brakes and the oil if let to go low in the transmission first messes up the u joint from lack of oil .The bushings are sold by many vendors but you need to double check the sizes as they are either not made to the proper size or there are variations in the torque tubes.If you mess up like I did then the torque tube will have to come apart to get the bushings out.There is a few y tube videos on line .one by a j hawker that shows changing his on a 49 chev car .
