I have a 1998 4wd with automatic tranny. So I never had a oil leak, I went up a pretty steep embankment in 4wd scrubbed a little but going slow. I got home and noticed a couple drips of oil underneath the transform case but looks like it came from the top, also saw oil by the front of the tranny. A couple days later no more drips. So my question is there an oil overflow that would cause this ?