[peachferrari]

Anyone should be able to do a tranny flush. Just make sure they use the recommended fluid, I've heard Hyundais can be picky about the fluid used.

For your brake pads, most newer pads are designed to start squeaking when they need to be replaced. They have material that will start to rub your rotors and make a squeaking sound (it won't cause any damage unless you get all the way down to the metal though). New ones shouldn't do that no matter what kind they are.