When I bought my 98. 5 3500 dually 2wd work truck, the original owner told me he ordered it with the "extreme duty" or "ambulance duty" front end, and when I go to get any work done on the front end, most mechanics will order parts for a 1 ton dually and end up with the wrong parts. Sure enough, this has happened quite often, even when I tell them the truck supposedly has some extreme duty front end. Is anybody familiar with this and how is it different? Truck has a straight, round front axle, if that helps.