i spent a little time poking around at a dealership (About a week helping out, actually), and the equipment there has two cylinders - one only sees clean fluid, while the other sees the used stuff... no worries of contamination there.

anyhew, if you do it yourself (recommended ), just make sure you keep it clean... little bits of anything can really muck up a tranny...

Question: When you get one of the "flushes" done, what happens to the debris that is already in your transmission filter and on the magnet? -does it go anywhere, -or does it just stay there?

(seems to me that it would be a good idea to put in a fresh new filter and clean the magnet immediately after having this so-called "flush" done.) I've been told that these shops that do these flushes will not drop the pan, or replace the filter due to liability reasons.

(and yes, the O.E.M. type gasket is certainly the best, being molded silicone rubber with "anti-crush sleeves" at every bolt hole) I almost always re-use the original, unless it had been leaking or damp, and then if replacing, get the good one from the dealership.