There is actually a gasket that goes here. It's Toyota part #
11182-71010. Although not required, I'll usually use a very thin layer of
FIPG (Form-In-Place Gasket) on both sides of the Toyota gasket. If you need the plate/nipple, I believe it's still available for 2wd vans and 5-speed 4wd vans. That is Toyota part #
11181-73010. If you have a 4wd auto, sadly that plate/nipple is NLA. You'd need to resort to something like what trestlehed did in this post:
http://www.toyotavantech.com/forum/s...5321#post25321. Tim