Yes you need to run the big rubber seal like this one in the pic. here. You need to try to get the stub shaft tight up against the spindle by shimming the outer snap rings on the stub shaft. I would not use that goop i would use grease like it calls for. If you ever have any questions you can...
Not true. Yukon an Superior sends us R/P once an while that guys have been breaken them so we can cryo them for some of there hard driving customers. They said its OK and will not hurt the warranty.
Yes cryo does help with the right materail. We test some stock axles an put them in the machine after cryoing them and it did help. Some materal like the stock output shaft didn't help. We heat treat R/P an then cryo them this realine the moleculel . We do these for drag cars for guys that were...