Hi ray587,
Could be a problem with the frame. You'll need to take pictures that clearly show the flex. Set the camera on a tripod or other fixed object and take pictures with gear down and with gear up. When you have the pics, call Heartland Customer Service at 877-262-8032 / 574-262-8030. Have your VIN # ready. If you email the pics while on the phone, you can discuss what you're seeing.