Re: 2008 E250 suspension upgrade recommendations
In my old 2006 E250, I ran LT tires and ran them at 40psi instead of 75. Going with passenger tires might help you out if the tire can handle the loaded carrying capacity.
An air suspension system can help make the ride 'float' instead of the constant rebound from the shocks. Cheaper shocks can potentially help, but a rear air bag system can not only help ride quality, but keep the vehicle level for better stability when loaded. I installed air bags in a Sprinter 3500 and I run them in the 40-60psi range. A lighter van would only need 15-25psi to make a noticeable difference. Too much air will stiffen the ride. I don't have an automatic system, it gets turned on/off manually by the driver. You can get systems with tanks and pumps you can mount under the hood to hide everything and keep noise to a minimum. Shackles are the lower cost option, for sure.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!