Some times using those large torque values will result shearing the threaded stub off the pinion or just cause thread or nut failure.We suggest you make it tight enough to hold,using thread locker and after your final assembly pinch the lock nut or threads with a center punch at 90*(4 spots).
How is enough to hold?
My last one I used the RA tech spacer (don't want it again, its wimpy and didn't like the shims, had to file it so that it would work) which said to torque to 120 ft lbs, so thats what I did. With the red threadlocker it was tough to take apart, I had to use a good deal of heat and strength. I used a correct pinion nut also.
I bought a Yukon one this time, much beefier looking, but they don't specify a torque. I'm thinking 150 ft lbs but not sure if thats enough. 200+ is crazy, how do you guys even get them that tight, special fixture to hold the case? I can't hold everything and torque it that tight unless I installed it in the car with the parking brake on.