Ill have a dana 70 for sale. Its will come off of my 2001. 5 2500 diesel. It has 45,000 miles on it and also the gear ratio is 3. 55. At 30,000 miles i put synthic amsoil in it. One of my friend has been using it for a while, when he took his cover off, all of the internal parts shined. So i tried it. If you need more info PM me