Hey guys haven't posted in a while but just recently we purchase a 385 peterbilt and installed a 20 ton hooklift system from swap loader. The truck met all of the specs required for the hooklift system. We loaded the truck up with about 17 tons and went to pick it off the ground the front tires came right off the ground. We emptied the truck so it only had about 13 tons and the front tires came off the ground about an inch or so. We have a 4900 international with a 10 ton hook and have maxed it out more than I can remember and never had any problems with the front wheels coming off the ground. If any one has a setup like this and can give me some insight as to what we maybe doing wrong we would greatly appreciate it. We are supposed to hear from the reps by the end of the week. I attach a picture. The box that we are lifting is a 14ft by 8ft with 6ft sides and a 54" hook. I was thinking we should get a 16ft box with a 61" hook height and hoping that would solve the issues.