Well it has the box seat bolted to the floor and does not have a spring seat (yet), however, with no trailer is was like riding in the rodeo. When i drove my first M35a2 home (Allison) she did not have one either. Driving her from Brunswick, GA to PA was like sitting on a jack hammer (spine crusher). With the bed the truck just went up and then down really hard. Now with driving Max bob tail with no weight on the back it was a different ride. When the back would bounce up I would go forward like he was trying to through me like a bronco (whiplash). Smiling from ear to ear the whole trip and still smiling 5 days later.