Actually, the filter was pretty cruddy, so I got a new one (screen, not paper) at AutoZone. Came with a gasket. There was no gasket on the pan, but I have been having leaks, so I used the gasket. Er, cork gasket that is...
The old fluid was a burnt smelling dark brown (and I mean DARK brown) but not black like I had feared the dirst time I looked at the dipstick. Of course, I've added about three qts over the past two years.
Put the whole mess back together and replaced 6 qts of tranny fluid, started it in neutral and let it warm up. Damn dipstick said, over full. Damn dipstick ALWAYS says over full. WTF?
Went to rehearsal, and since it was still 75 degrees at 9:30, I decided to go for a drive. About 5 miles out I started smelling what smelled like burning tranny fluid, but I noticed a garage was open and someone was welding, so I let it go. Three miles after that I can into a small town where there were street lights, still smelling that smell, and then saw the *CLOUD* behind the car...
Got home and saw where it was spraying out of the passenger's side of the pan onto the exhaust.
Now, I also used blue (clear RTV) gasket maker. Since there was no gasket, I'm wondering if I should just go to Toyta and get some FIPG. There was reddish/orange RTV on it before, and though it leaked, it didn't spray out!
Oh, and I *DID* go criss-cross with the bolts after locating the pan with the tranny. And I removed all the old RTV. And I put everything back just like it was.
Except for adding the gasket.
On the up side: throttle response was back! The car ran nice and smooth, and even though I have to move the lever through the gears, the shifts were just like they should be. It was (somewhat) like driving a newer car!