Ok, got a new rear driveline made by High Angle Driveline. I opted to swap out the stock strap style 1350 rear Corp14ff pinion yoke for one of HAD's 1410 u-bolt style yokes. Here is my question, in an article on Pirate detailing the swap, the guy who does his says that his is a trail rig. As a result, he doesn't worry about the pinion pre-load. However, he qualifies that statement by saying that if you run the street, he recommends doing what the manual suggests. So, I print out the section of the manual on setting the pre-load. My queston is, will simply measuring the amount of ft. lbs. it takes to back off the pinion nut, then add 1-5 lbs. of additional torque when I swap out the yoke, be good enough to take the pre-load back to the original spec? And, if I just had the diff rebuilt with all new stuff, will I need to swap anything new in or can I just leave it as is? I also see in the manual that they use a special tool that bolts to the yoke. What the heck is that thing? Is that simply a bar that keeps the yoke from moving while you back off the nut? And, why would you need it if the pinion won't turn anyway?