2007 WINNEBAGO SIGHTSEER Steering Problems

THIS RV WAS BOUGHT IN NOV 2011, FROM THE DEALER AND DROVE IT HOME ABOUT 3 MILES DISTANCE. DRIVING AT 40MPH, I FELT THERE WAS ALOT OF POWER STEERING AND I FOUGHT THE STEERING TO STAY IN MY LANE.THE VEHICLE WAS STORED IN MY DRIVEWAY FOR THE WINTER MONTHS. FREQUENT TURNING ENGINE TO WARM UP AND SHORELINE HOOKED TO HOUSE POWER. MAY3, 2012, I, WIFE AND ADULT SON DEPARTED TO WILLIAMS, AZ ABOUT 130 MILES FOR CAMPING AT A FEDERAL CAMP SITE. I DROVE MOSTLY ON THE BACK ROADS AND AVOIDED THE I-HIGHWAY 40. OVER 40 MPH I COULD SENSE THAT THIS VEC. HAS ALOT OF POWER STEERING, AND UP TO 60 MPH. I COULD NOT CONTROL THE STEERING AT ALL..THE VEC. WAS GOING WHERE IT WANTED TO GO EITHER LEFT OR RIGHT AND I HAD TO COUNTER THIS BY TURNING SLIGHTLY BACK INTO THE PROPER LANE. AT TIMES, ON...