I have a 2010 FX4 SCREW 5.5' bed. I've installed Bilstein 5100's and leveled her out and installed a set of the Raptors wheels and tires.

My question is, when I load up the bed with gear, maybe 400-500lbs average, 800lbs max, the rear sags as expected, however when offroad this causes some good rubbing on the inside of the wheel well under situations requiring good articulation.

I don't know a heck of a lot about suspensions for trucks and was wondering what the best way to go would be, and the pros and cons.

i've looked at Air bags, Helwig EZ-990, 1" block. What do you guys say?

Thanks a lot.

 

Each one has pros and cons. Search each one with the forum search button and you will find something.

 

Airbags...

Pros:

1. Can be inflated or deflated whenever you want, to adjust firmness, sag-height, ect...
2. Easy on the wallet
3. Doesn't add to the 'rake', just maintains factory ride height.
4. Easily removable, should you be concerned about the dealer seeing, though this is probably the only suspension mod that they wouldn't have a problem with. It gives you a slightly stiffer ride, but prevents your shocks from articulating to the point of bottoming out, or stuffing tires in your wells.

Cons:
1. You need to have an air compressor or drive to a gas station to adjust/fill the bags.
2. Limits articulation when full, but you can always just deflate them.

Anything else I'm missing?

 

Neither... Timbrens springs. My buddies and I have put these on every truck we've owned and couldn't be happier. A couple guys have 37-40ft 5ers and love them to death. No need to have to fill bags or deal with a rough ride of an extra leaf. unloaded- factory ride, loaded- awesome control with zero sag. 20 min install and they are always ready for a load, no need to preplan.

http://timbren.com/

 

If you offroad, you'll want to avoid airbags. If a stick or something hits it hard enough, it'll poke a hole.

Since your truck already has a 1" block from the factory, I wouldn't add another one or use a larger one.

Overload springs are probably going to be the way to go. Most of the ones out there are engaged all of the time. So your ride will be stiffer. If you don't mind a stiffer ride all of the time, the Hellwigs will work just fine. If you want a normal ride when unloaded, look at the Maxloader overload springs. They're more money, but they don't engage until there's a load on the vehicle.

http://www.realtruck.com/maxloader-o...1924P1C1T.html

10% off with coupon code Max10

 

Load Levelers or Super Springs would help....

 

Thanks for the replies. That Timbren or Maxloader seem to be what I'm looking for. Since I do offroad quite often and with a full bed(at least on the way in) I just want to limit sagging and prevent the heavy rubbing I have with my setup under full articulation.

The sagging fix might fix the worries I posted about earlier regarding installing the Raptor size spare, which would probably hang down much more than the stock spare.

 

id pick up a add a leaf

 

^ x2. Had one on my 01 screw, didn't notice any major ride difference. It will lift your rear but you can swap it out with that 1in block if its too high for you.