I JUST WANTED TO INFORM YOU OF A PROBLEM THAT I HAD WITH MY 2001 FL50 SUPERCREW. MY TRUCK WAS EQUIPPED WITH A 4X4, 5.4 LITER, AUTOMATIC TRANSMISSION, TOWING PACKAGE, AND IT WAS AN XLT LARIAT. ALL THE BELLS AND WHISTLES! MY REPORTED CONCERN IS THAT THE SUSPENSION IS NOT STRONG ENOUGH FOR THE RATED TOWING CAPACITY. I WAS TRAVELING ON THE INTERSTATE AT ABOUT 60 MPH. A CAR CUT IN FRONT OF ME AND I MOVED TO THE LEFT LANE TO AVOID RUNNING INTO THE CAR IN FRONT OF ME. MY TRAILER'S EMPTY WEIGHT WAS 5000 LBS AND I ESTIMATE THAT I HAD ANOTHER 1000-1500 LBS INSIDE. THE TRUCK WAS EQUIPPED WITH WEIGHT DISTRIBUTION BARS AND AN ANTI-SWAY BAR(REESE MFG.). WHEN I CHANGED LANES THE TRUCK SWAYED/LEANED HARD TO THE LEFT, THEN SWAYED HARD TO THE RIGHT. THE TRUCK THEN ROLLED OVER SEVERAL TIMES AND LANDED ON THE DRIVER'S SIDE DOOR SLIDING DOWN THE EDGE OF THE INTERSTATE. THE TRUCK AND OUR 29 FOOT CAMPER WERE TOTALED. THERE WERE FOUR PASSENGERS IN THE TRUCK: MYSELF, WIFE, AND TWO CHILDREN. EVERYONE SURVIVED WITH MINOR CUTS A