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I searched through my manuals and did a internet search but did not come up with a direct answer so here I am. I am replacing the front pinion seal and am wondering how much to torque the pinion nut. I had to use an impact to remove it so do I just snug it up good so it is tight or is it possible if I over torque I could cause problems? Also I did read where someone suggested replacing the nut with a new one so I am also wondering if this is necessary. Thanks all.

It's a 3/4"-16 nut. Standard torque charts put the torque around 180 Ft Lbs. But the axle specific rebuild guides raise that to 200-220 Ft Lbs.

Thanks again Wes. So is it necessary to replace the pinion nut?

Not unless it is damaged or suffers serious thread ware. If you are unsure what constitutes damage or serious thread ware this would be a good time to research the topic "Standard Hardware Fits and Tolerances" and "Common Hardware Damage". Just google them up. You will quickly find out you are a wee short in the proper gauging tools to accurately measure the fits and clearances. So that would be another research topic: "Standard Gauging Tools".