Anyone done this yet on a WD21? What's involved? I think that's where my oil leak is coming from. I've got a 170K and it's leaking good between the tranny and engine sandwich...and no it's not tranny fluid, I'm sure of that. I've washed and degreased everything and let it all come back just to be sure. My auto tranny gasket does have some seepage as well after, and my oil pan gasket is still dry all around. I know there's a separate gasket sometimes on the u-shape part of oil pans near the back, could that be it or is it a one piece gasket all around? I've seen or have had this type of leak before on other vehicles, but never fixed them or attempted it myself, just kept the level up between changes before. I'm pretty mechanically inclined with bolt on stuff, but that's about all I've ever done before. What kind of tools would I need outside the normal stuff I assume most of us have. I do have air tools too.