Wow. You definitely do have an issue there. Look for a bushing outside of that splined gear that's chewed up. The gear can be loose. It meshes with two other similar gears. Along with the one on the other side, they all rotate inside the differential assembly as a unit. They won't cause a vibration, but that bushing will let the inner cv joint move away from the axle seal too much and cause the leak you found. You might be able to replace that bushing by using a special tool to pull it out once the seal is removed. The new bushing is tapped in but be careful to not twist it or push it in crooked. That can deform it and cause it to rub on the cv joint and fail again. Use a new seal too.
Thursday, October 10th, 2013 AT 11:57 PM