I drove the company F450 the other day and about 1 mile from my house the serpentine belt started to go. Towing this F450 Crew Cab with Extended Wheel Base and a custom Douglas bed on it is going to run $600.00. They need to use a semi type wrecker. It has the 6.0 diesel and single aternator. I bought a new Ford belt and asked the service manager how long it should take. He said 2.5 hours but closer to 3.5 in real time. Has anybody ever done this. It is a major pain in the arse. The first thing to come out is the radiator.