i have a used posi carrier to install in my 7.5 rear i;m not touching the pinion just putting my ring gear on the new carrier i have a formula to measure carrier preload ... total inch pounds of pinion and carrier minus inch pounds of pinion only multiply that number by gear ratio = carrier preload my question is what should my carrier preload be with used bearings ? and should i use locktite on ring gear bolts and bearing caps ? thanks all for your help with my winter project if temperature matters i;m doing this in my basement work shop temps about 65 deg