I have an F250 and had a GM 2500. The 2500 was great with 3500lbs in the box but the F250 needs help to carry it. I have the camper helpers that are set to low to carry any weight. The F250/350 are sold and build for smooth drives and in my area we add spring plies on the commercial trucks.
Mine was riding on the overloads with 3 in drop and drove like a buckboard. Added 2 more plies to keep it from the overloads and the ride is smooth unloaded and loaded.
The F350 SRW has 2 more inches of lift to allow more drop while keeping the drive line in spec. It's a pour way of adding weight capacity and to Ford thinks we seldom load these trucks and they are right. But to work these rucks they need more then soft springs.
Barbara and Laurent, Hartland Big Country 3500RL. 39 ft long and 15500 GVW.
2005 Ford F250 SD, XL F250 4x4, Long Box, 6.0L Diesel, 6 Speed Stick, Hypertech Max Energy for Fuel mileage of 21 MPusG empty, 12.6 MPusG pulling the BC. ScangaugeII for display..