I've got a '96 Avalon with 205k miles. It's been a great car, and still runs strong. The repair costs lately have gone through the roof, and I'm looking to start doing as much as I can myself. I was surprised to see some references on the forum to testers, as I thought cars these days always needed a computer costings thousands to run diagnostics.
Anyway... I'd love to get information on the following, if anyone knows about these topics:
1. I want to change the filter on the transmission, if possible.
2. I want to get a good book on repairs. I've only found a Haines manual covering several yrs. of Camry, Avalon and Lexus 300, all in 225 pp. or so it looks. Looks awful.
3. Some references to some good diagnostic tools and how to use them.
I've always changed my own oil, I've changed the transmission fluid, and done my own brakes, so I'm not totally daft.

I've just had my fill of paying mechanics an hour's wage for doing 35 mins. of work and getting a bill that looks like I've been to the urologist several times.
Thanks in advance for all responses.