With my truck running and in Park, when I turn the steering wheel I hear a squeaking sound coming from the front end. Also it is very difficult to turn the steering wheel. When moving everything is fine. I suppose the squeak is still there but just can't hear it. Would ball joints cause this problem? There is no shake or vibration at up to 75 mph. If not any other suggestions. It has the original ball joints at 125,800 miles. BTW, I greased all the front end parts i could.