Q: Have a 1994 f150 2 door. Power steering whine for about 2 years. Finally decided to go to Autozone and get a new pump. Put it on a

I’ve been down that road a few times with other types of cars. You have taken the correct first steps, and I presume you are using the correct factory recommended fluid. If your truck has a pressure relief valve that was not part of the pump, it could be coming from that. The pressure relief valve may be built into a banjo bolt that attaches the high pressure line. Other times I’ve fixed a whine by replacing aftermarket hoses with factory hoses. It turned out that the factory hose had a restrictor orifice built in that the aftermarket hose did not. Lastly, it could be that you just won’t get satisfaction out of an Auto Zone pump. Parts sold by the retail chains are usually not of the best quality, and it is not uncommon to have the same malfunction in a series of parts because of a problem on the assembly line. So you may not solve your problem until you bite the bullet and buy a factory replacement. If you decide to have this checked out by another set of ears, contact YourMechanic. They can send a technician to your home or office to check out your power steering whine and give you a second opinion.