You're going to need the proper tools: A roll of Bounty, A small mirror, and a pillow (to save your neck from cramping up). Pour enough fluid in that trans to put it a couple inches over the full mark; then you might catch the spot in the act. I do bench job TF rebuilds covers all hard parts plus detailing for $400. People call me up and say they don't want a rebuild and detail; how much to stop it from leaking...I say "it's $400"... Cuz, "There's never enough time to do it right; but there's always enough time to do it twice".