My 2006 Suzuki SX4 (61k miles) has just started doing something odd that makes me a bit worried. There is an oscillating, deep sound that varies with the speed that I drive. It almost sounds like the sound an unbalanced washing machine makes on spin cycle.
Sort of like "whoosh-whoosh-whoosh-whoosh", a very deep sound, oscillating at about 2 Hz when I am moving around 10 MPH, and 30 Hz or so when I'm moving around 60 MPH. Accompanied with the "whoosh" at low speeds is a noticeable lurch. The whole car seems to get caught on something whenever I hear a "whoosh".
3 months ago (before this started) I took the car in for an oil change, and I had them check the brakes and fluid levels. They said the tires were extremely bald and had dry rot, so I had them all replaced. They also said the tie rod had come loose, and had repaired it. They said the brakes were fine, but I haven't replaced them in 4ish years so I'm a bit skeptical. I'm going to take it back in soon to correct this problem and change the oil again, but I'd like some background to know what to tell them. Any ideas?