My Dakota has served me well for 175,000 miles. It has recently developed a rear end vibration that I am unable to determine the cause. She runs smooth up to 40 mph and then has a noticeable vibration from 40-50 mph and then subsides somewhat. Additionally, I feel the engagement in the rear end at start up speed between 0-5 mph. This is more noticeable when I have placed added weight in the bed. It also seems that it comes from the rear drivers side. I have made a number of changes already: tires, brakes & rotors, carrier, transmission fluid and filter, U-Joints, to name a lot. I have driven her for several months without an incident...yet. I liked to keep her rolling.

I had a power steering hose replaced after finding a pinhole. When the 98 chevy prism was returned the fluid level was above max and I hear a whining noise when turning. Is over filling a problem? What does the whining indicate?