Need help with gear oil selection

...............................With me being old school and all, mopar always recommended ATF back in the day, we never had any problems back then,does no 1 use atf anymore,,,,,,i was told never to use synthetic in them...........kim.......

Yup. ATF is the first factory recommendation. You just caint convince some people not to latch onto to the latest and greatest. So I'm just gonna quit tryin. lol