It went on but,when I tightened the nut it almost locked the pinion shaft up,so pulled it back off to measure the depth with original,that seemed to be the same,put it back on but tightening the nut even the slightest woul create drag,cant figure it out,so I just ran it up with my fingers and had to turn it just a little to get cotter pin in,gonna leave it there right now until I figure out something,its got the engine,trans/transfer case out right now,my just fix my old one and put it back on!Not gonna rate it,until I figure out whats going on!