I will be calling Moog technical support (hopefully tomorrow) to pick their brain on my actual max load of 3260 pounds. My current stock 2007 E350 springs are rated at 4600 pounds, the same as an E450 of the same model year. Moog offers part number CC81366
which x2 is rated at 3786 pounds. The coil springs have some coils closer and some farther apart to provide a softer ride as well.
I am determined to research this through. If convinced, I will buy a new pair, install them myself, and see how they perform. I want to try all this out with my old tires before replacing them, followed by a front wheel alignment.
Rock Auto sells them by the pair for $108 with taxes and shipping included.
Raising the rear with air bags or other means, presents a height issue clearing our garage door. I could let the air out of air bags, but knowing me, I will forget to do it.
Replacing the front springs seems to offer these benefits.
- a better wheel alignment
- a softer ride up front where we would feel it most
- a little lower over-all height (more clearance to our garage door opening)
- a level rig when loaded up
- a little lower first step into the front cab
- a minor improvement in aerodynamics and handling
Ground clearance is so much now. I can afford an inch or two lower and still crawl under for an oil change without jacking up the front.