Okay, so I drive a 2001 Ford Escape XLT 3.0L V6. It was my mom's car for a while then she gave it to me a couple of years ago for my senior year of High School. Right now I'm doing some typical maintenance like changing the oil, the filters, etc. Now, a little over a year ago my power steering pump failed and it was grinding real bad. My dad helped me change the pump but what I didn't realize was that there's specific fluid for each pump so I put the basic fluid you buy from AutoZone and what my vehicle needs is Mercon V Transmission fluid. So for the last year or so it's been grinding so I'd like to try and change the fluid entirely. Once in a while it seems as if the fluid kicks in and my power steering works flawlessly and other times it grinds and sounds like a can opener. I'm wondering if it's too late. The guy at AutoZone said it's never too late and if it is, my pump has a Warranty. Anyways, I've seen some people using the "turkey baster" method simply by using a turkey baster but there are some people that use the turkey baster and disconnect the hoses and there are some people that just use the turkey baster. I won't use the turkey baster but I'm looking at using one of those transfer pumps that they have at AutoZone for $15. Is okay if the Mercon mixes with some of the older fluid?