We removed a few old in ground lifts at the shop for new two post lifts. So we needed some concrete to fill in the dug out holes. So I did a little math and according to payload limits I could carry 36.4 80 lb bags of concrete or 2950lbs. I carried 37 bags for good measure. She didn't even hit the load leafs by much at all. The 05 SuperDuty is nothing short of a spectacular work horse . lets see your Lightning do this Doug .