Front Suspension problems of the 2008 Dodge Caravan

1st started 1 days after purchase of our Dodge , 2008 , Caravan, from mike patton chry-Dodge- Jeep, lagrange, GA , June, 12, 2008. We notice a pulling of the car to the right with hands off the wheel and high rate of over 40 mph, both on the rrural and interstate driving. Took back to dealer and had to replace what they refer to as a " cam bolt " component on the right front tire. Over the next couple of years we conti to notice a steady pull to right, the alignment was neve out of align we had check twiced. June of 2011 we are having to replace right front tire and after rotation of tire atleast 3 tires for wear on the outside. All these tires have been place on the right front at some time or another due to tire rotation. I believe the cam bolt componment was defective from the manufacture date of the of the vehicle. The tires on the vehicle are rate for 60,000 miles , miles on vehicle at this time 31278. We are now back at the different Dodge dealer to have determine if this is the same problem or not.