DT: THE CONTACE OWNS A 2003 DODGE GRAND CARAVAN SPORT. THE THERE ARE APPROXIMATELY 20,000 MILES ON THE TIRES. THE SERVICE DEALER STATES THAT ONE OF THE TIRES HAS LESS THAN ВЅ TREAD, THE OTHER THREE HAVE APPROXIMATELY ВЅ TREAD. THE TIRES ARE UNSAFE IN THE SNOW AND RAIN. VIBRATION IN THE VEHICLE WHILE IN REVERSE OR WHEN SLOWLING. HE HAS NOTICED THE SOUNDS BECAUSE OF THE VIBRATION. THE DEALER SUGGESTED THE CONSUMER MAY HAVE TOWED SOMETHING TO CAUSE THE TIRES TO WEAR, BUT THE CONTACT SAID THE VEHICLE WAS ONLY USED UNDER NORMAL CIRCUMSTANCES. THE CONTACT FELT IT MAY BE FROM THE FRONT END BEING OUT OF ALIGNMENT FROM THE MANUFACTURER. THE CONTACT STATED RACK AND PINION STEERING WASA REPLACED. THE DEALER WILL EXTEND THE WARRANTY ON THE TIRES, BUT WILL NOT REPLACE THE TIRES. *AK