I'm in the process of making a plow rig out of an 1987 jeep cherokee. I need to replace the rear end becausee the ring gear is damaged and I have ran into a couple of questions regarding this whole process: 1) The gearing that is in the differential now is 13 teeth on the pinion and 40 on the ring, most rear ends and replacement gears I can find have 14x43, so: 40/13 = 3.07692 43/14 = 3.07142 Are both these setups considered 3.07:1 gearing or is the higher one 3.08:1? Also, if I put in a 14x43 setup in place of my 13x40 axle will they grenade when I use 4wd being that my front axle is setup with that much taller gearing? Where talking .0055 of a difference? Thanks for any insight you may have, i'm new to all of this stuff!