Anyone else have this happen to them:
When cruising around 30-35 mph, in Auto, sometimes when I press very slightly on the gas pedal, the whole car will start to vibrate like I'm driving over rumble strips. The pitch of the vibration will increase as I give it more gas until it goes away, somewhere around 2,500 - 3,000 rpm. This never happens at higher speeds. It seems to happen more when I'm in slow traffic, I break lightly and then give it a little gas. I've got an appointment set up for Monday morning. I'm just wondering if anyone else has experienced this. I first noticed it about 2 weeks ago.