stock front diff in the rear,3.73 gears-open.yup,big angle on the rear shaft.not too worried about reliability for a couple reasons-stock tire size and no intention of beating on it will keep the load down,plus it's awd so the load is always split between the front and rear diffs.besides,if you let fear of breaking something stop you from trying something fun.........well,you just won't have any fun.push the limits-learn from the results.