Hey....looking for some advise on changing the pinion seal on the diff in my 1980. Diff is original and untouched, I already have it out of the car. So, can I count the treads of the pinion that are exposed and the number of turns to remove the pinion nut as a guide to re-installing the pinion nut the same way after I replace the seal? Will this get me my preload close to what it was before disassembly ?...