[John S Peterson]

Usually when you replace the pinion seal, you measure the rotating torque with a inch pound torque wrench before dissassembly. When reassembling, install the flange, washer and nut, retorque to the same reading you got previously and add a couple of in/pounds. This has worked every time, and is the method I teach in my auto class. This is to say that you have no other problems other than a leak.