WHILE DRIVING WITH CRUISE CONTROL ENGAGED AND GOING UP A HILL, VEHICLE GOES PAST 3RD GEAR INTO 2ND GEAR, RACES UP TO OVER 5000 RPM WHICH RESULTED IN A COLLISION. TOOK VEHICLE TO DEALER AND THEY ADJUSTED THE SPEED CONTROL LINKAGE, BUT PROBLEM REOCCURRED CAUSING LOSS OF CONTROL. SPEED CONTROL LINKAGE ADJUSTED AGAIN, PROBLEM HAS NOT REOCCURRED SINCE. *AK *ML