Add me to the list for those with this exact problem. Purchased my SX-Prestige about 3 weeks ago. Thought I heard some weird rumblings at 69 mph right after I hit 1,000 miles. Well, I drove 750 miles today for the holiday, and I always get the audible vibration anywhere between 67-72 mph. 70 mph being the worst. It really sucks because my 60 minute work commute is on a highway with a 60 mph speed limit. I guess I’ll have to drive 65 mph and get passed all the time, or speed and risk a ticket driving 75 mph. The vibration and noise is definitely coming from the rear. And it seems much more pronounced now as I keep racking up the miles. Frustrating as hell, as it Is smooth at 75 and even 85 mph. I’ll call my local dealer Monday once I get back in town to schedule a time to bring it in. Given the highway miles I drive , this isn’t something I can live with. If they can’t fix it, I’ll probably have to sell the thing, get rid of it. It’s a damn shame , everything else is perfect. But yes , I agree, this is probably going to have to be a group effort getting this solved for those of us experiencing this.
