Okay, I have a leaky pinion seal on my 9". I have read both my repair manuals on the truck and I cannot grasp this whole per-loading issue. One part says that you need to establish the pre-load torque prior to disassembly (okay I got that), then it says to re-torque the pinion nut back to this after replacing the pinion seal, but it also refers to the torque spec of the pinion nut being 160 ft lbs. How am I supposed to tighten the same nut to a torques of 20 to 40 inch lbs and also 160 ft lbs????????????????? All I want to do is replace a leaking POS pinion seal, not rebuild the entire third member.....HELP!!!!!!!!!!!!!!!!