For the last two years the power steering worked as long as the truck was cold but when it heated up there was almost no power steering. There was a whine in the pump and I thought it was getting ready to give up. The water pump went out this week and while I had everything apart I put in a new Motorcraft drive belt which had at least 145,000 miles on it. The belt showed very little ware and I almost left it on. After getting everything back together the power steering worked great even after the truck warmed up. I guess the old belt stretched out after it warmed up. If you have power steering problems and have a lot of miles on your belt it might be worth while to try a new belt first. HTH!!!

 

Flush the PS if you haven't already...put in synthetic ATF. Your PS pump will love you, again .

 

Done the flush twice, did wonders for the brakes but not much for the power steering. Thanks for the response.

 

I experienced significant positive changes when flushing the PS and putting new ATF in.... However I was previously running PS fluid. Found out the hard way you are supposed to run ATF . Live and you learn I guess