The lower ball joints suck ass to do. I tried to do then myself but the AutoZone ball joint press rent a tool would not budge them. So I had to pull the lower A arms; which is a royal PITA; and take them to a shop. The shop I went to broke their 10 ton hyd press trying to push them out so they had to heat the A-arms cherry red and pound them out. They had another Durango in there and they had problems with it too. Rust is a bitch on cast iron a arms.