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Dear Vernon,

Good p.m. The power steering fluid should not need changing. It should be a rosy pink (to see its color, let a drop fall on a clean white paper towel). It should only be changed if it is brownish, etc.

I'm not quite sure what you mean by "going over the lump" movement. If you meant that the car bounced several times, that could be a sign that new struts are needed, or possibly that a strut is loose. That may account for your steering abnormalities.

A worn-out bearing will hum, moan, or growl: these noises intensify with speed. A worn ball join will typically create some front-end shimmy, which you may feel in the steering wheel. I doubt you'd notice it at very low speeds.

I think you should have the front end inspected, by someone well familiar with Volvo suspension.

Yours faithfully,

spook