He's putting a HP30 and 4.10s in his TJ. The Jeep was advertised as 3.73, and the tag on the Axle says 3.73, but he pulled the rear apart today and it's 3.07. He has thick cut 44 4.10 for the rear but needs the 3.73 and up carrier for the front. He already has the standard thickness 4.10 for the front.