Ok- I bought my burb in June. He was a bit neglected so I've been slowly bringing him back to fully serviced standards. Did new shocks/struts and brakes/rotors all the way around. Also new upper and lower ball joints. Now I have a funny noise at low speeds. Only occurs at low speeds, and stops as soon as I tap the brake. Its like a rhythmic "hoo hoo hoo" noise definitely coming from the front. No light or anything on the dash or dic. Any ideas what to fix next?