Review on Energy Suspension 9 9109G Heavy Duty by Andy Edwards

I bought these for my 2001 F250 to make my motorhome more stable. This is quite a dramatic improvement when the camper is loaded. The rear suspension had to move nearly 2 inches before the factory overdrive spring kicked in. With this expansion, it comes into play all the time. When the motorhome is loaded, these extensions greatly improve lateral stability and ride quality while reducing rear sag. The downside is that since the overload springs are activated even when the truck is unloaded, the unloaded ride quality is somewhat degraded. Ideally, for my particular application, they should be 0.5 inches shorter for a smoother, no-load ride quality.