One side of truck sat low, shortly after the other side sat low. Rear end airbag suspension gave way as well as the springs. Air bags were replaced twice with in 3 month period. After recieving truck from repair shop it was noticed by body shop that frame on left side was cracked. This crack was in front view of service people and not detected. I do not recall the crack from the previous time the air bags were replaced. I do not recall the crack when I dropped the truck for second replacement of airbags and springs. The truck frame on left side is held together by two inches of connecting steel and I have been advised not to drive the vehicle. This truck is my livelyhood and only means of transportation. Ford body shop will not weld or repair frame do to liability. They recommend new frame. After discussion with service people and body shop manager it was revealed that Ford made changes to the frame in the 1999 year. This is why in the 1998 F-250 a disiel engine was not available. Other words the 1998 F-250 was found to be a weaker frame than any other year. Also, the design of the airbag suspension system of this truck is weaker than even the F-150 models. The springs are of lessor materials and lessor strength. This was explained to me that this was done do to the airbags capability to make up the difference is support. My view is that all these components work in unisonand when one system failed the others followed. The repairs I have done are not remedying the problem and I have paid $ $2000 and much lost time. There is a defect in the frame and Ford needs to correct this problem..

- Homestead, FL, USA