LJs have a D30 front like the TJs, and ALL LJs have a D44 rear end, where a D44 in a TJ is an upgrade. A Rubi LJ has front/rear D44s just like the TJs. They also have a 103.5" WB where a TJ has a 93.5" WB, so 10" longer WB, and 8" more storage behind the rear seats, so 18" overall longer body. All gearing is 3.73 in the axles except the Rubis which is 4.10s. TJs had 3.07, 3.55, 3.73, 4.10 stock options.