I purchased a 2003 Expedition in Arizona that's beautiful inside and out but has high miles. The suspension was worn out, badly. Lots of play in the ball joints and split CV boots. The owner said he had about 10,000 MI on the like new tires. Howls loudly. So I sunk over a grand into it and replaced everything front and back (myself): control arms, wheel bearing hubs, CV axles, struts, tie rod ends, rear control tie rod ends and four wheel drive actuators. Had it aligned at the Ford dealer. Now it rides smooth and straight but it still howls loudly, exactly the same as before. The Ford dealer says not to worry, the tires will wear themselves evenly and the noise will go away. Does that sound correct? Or do I need new tires?