Actually, changing the transmission fluid at 30K is a good idea if you plan on keeping the vehicle past 100K.
Of the "Chains", I find Brakes Plus to be the best. I would stop by the one close to you and give them a once over. The one near me is really good, old school mechanics that do waht you ask, and still do a check on the car.
With all that said, I don't like anyone touching my cars, guns or wife except me...call me jealous, but I know what I have when I do it myself.
If you don't have tools or a garage, give this place a call:
http://www.doityourselfgarage.net/index.html