best bet go to your Jeep dealer with your VIN theny can tell you what you Jeep came with.I can tell you you don't have 4:10 gears unless they swapped them out. Other thing to do remove rear cover count pinion gear teeth and the ring gear.
Rubicon Rich ,05 TJ Rubicon: PatriotJeepers.com
86 CJ7 258,T18,Scout Dana300,twin sticks,Dana44's,4W Disc, locked,35's,YORK OBA,Warn 8274,fullcage.
51 M100 1/4 ton Jeep trailer