At low speeds while turning, there is a noise that sounds like I need to add power steering fluid. After checking it out:

it looks low, and the fluid is all black and gunky on the stick. my owners manual says to use ATF oil, and no fluid change is required. can i just top if off with ATF oil from the local auto parts store, or do I need to flush it out or get some other special kind of fluid?
thanks for the help!






