Not trying to dispute your comments but is this just your opinion or do you have some facts to back up what you are saying about the factory shocks on the FX4? Just wondering as I have an FX4 too.
jim - in order of difficulty:
1) check out the Ford truck forums, in particular Ford Truck Enthusiast
2) Call Rancho tech support
3) Crawl under your truck at look at the cheesy white paint (no doubt rusting through already) and near the Rancho decal you will find a standard Ford part number and the word Motorcraft stamped on the lower end.
We ordered the max spring pak with 11,500 GVWR on our King Ranch. Not sure what the Rancho shocks give you other than color. FX4 package gets you skid plates and Hill Descent on SRW and a different decal.
Not sure what you mean by max spring pak, 350's should have already had the heaviest springs in the rear.
Th OP was-now has a DRW, hill descent not available on the DRW's as well as the electric locking axle.
Our SRW rides perfectly level.
the biggest difference is the four inch blocks on the 350 versus 2 inch blocks on the rear springs mine rides level with without airbags
As Jon noted, the SRW comes with 4" high riser blocks between the spring and axle. The DRW has 2" blocks. So, if your truck is level on a already high SRW with the same weight it will be 2" lower on the DRW.
And with the DRW that puts it less then level and too high headlights. Not easy to see in the picture, but the upper pic of truck is unloaded, bottom, somewhere between 2500-3000 pounds on the pin.
I have the FX4 package and as far as I understand it I dont have the Hill Decent (Exhaust Brake) option. As there should be an activation button by the TRaction Control button.
The tranny will downshift early in Tow Haul mode and use resistance from high rpm to add to the slowing of the truck. But that is only effective if there is enough rpms in that particular gear to help
Matt - You do not have the hill descent with the DRW, that is a SRW only option (as is the electric locking differential).
"Hill descent" is effective up to about 20 mph going downhill. The system uses a combination of engine control and hydraulic brake activation to maintain a slow speed going down a steep hill.
Although the DRW's are listed as not having it, you probably have the "hill hold" feature. This feature will keep your service brakes applied for about 2 seconds when you take your foot off the brake on a hill, giving you time to apply throttle before rolling backwards. AFAIK it only works uphill. This is a neat feature and works well.
None of the Fords have an exhaust brake. They do have a cheesy way of branding what they do have, engine braking controlled by the PCM.
You do have exhaust braking. All Ford's new diesels since 2011 have it.
http://www.youtube.com/watch?v=tlfz8LAM1xs There's no activation switch like there is on the GM or Dodge. It's activated in T/H mode when you tap the brakes and works best at higher RPM's.
No, you don't. Dumping exhaust into the intake is nothing more then EGR and not an exhaust brake. Mike Rowe is just reading a script from marketing.
And BTW, in the video is a good example of a DRW with a heavy load and sitting low in the rear, and the headlights high.