when removing the filter theres a fat O ring that sits on the filter tube, when you take the old one off the O ring will sometime stay in there, most will just reuse the one that stayed in, or pull it out with a pick.

there is also a toque spec for the trans bolts, im not sure what it is off hand, but nice and snug works well. do not over tighten the bolts as they will break.

and that wraps up this episode of trans service 101.