I've run Rancho adjustable shocks from way back when you had to compress them fully and turn the shaft to do the adjustment - that's a long time ago

The RS9000's I have on now, "9" is way too much unless you're hauling serious weight, or have a plow on the front. The idea is not to turn them up so high that they impede suspension travel. They only need to be set high enough to stop the tire from leaving the pavement as the suspension compresses, but soft enough to keep the frame from moving more than what the spring causes. But even then, depending on what you like, there's still plenty of room to adjust either way.

As for tire pressure, unless you are running at the max weight of the tire, NEVER EVER inflate to the full rated pressure. Depending on the tire, you can have less tread contact with the pavement, lessening traction and causing more wear in the middle of the tread. On the other hand, don't go too low or the sides of the tread will wear out faster then the middle.

 

The tire is telling you to run a max of 80psi cold in order to hold the maximum weight the tire is rated for 75-80 on the front is going to ride like a lumber wagon no matter what shocks you have on. I run 60psi on my fronts and the ride quality difference is dramatic between 60-70psi. Air the fronts down a bit more, you'll like it. That will make your largest ride improvement, and it's free.

 

Guess Ill try that too. Nothing to lose and its free. I will find the TPS threshold too.

 

Yes, the sidewall is listing the maximum possible psi at the maximum possible load. It is a safety limit specification, NOT a recommendation.

 

Back to the color topic on the shocks .. It's pretty simple to Re-paint them when they start looking worn

 

I have a question for Rancho related to the part numbers. I have a 2015 F250 with the FX4 package, camper package and snowplow package. Yes, it rides like holy hell when empty, to the point where we are considering trading it in on a Ram HD. We occasionally tow a 9000# TT, but this truck is also my daily driver.

The combination of options on my truck means that it has the 4" blocks (instead of 2") and overload springs in the rear- essentially the F350 SRW rear suspension.Should I be ordering the F250 or F350 SRW part numbers for the rear shocks?

 

if you don't plow, swap out the springs, it'll be easier than changing trucks

 

If the ride quality is that bad look into replacing your springs with a lesser than Max GVR ratings.

 

Wow, what good timing on this. About two weeks ago my ride went to %$# it seems like overnight. Tires are 80%, replaced 4 body mounts last year. Run 65 psi in tires and have .since new. It seems it picks up the slightest bump in the road. Ride used to be great, enjoyed driving on 6 - 7 hour trips. Now dread a 1 hour trip. Shocks? Have 165,000 on OEM. Do shocks go out that quick?

 

Yes. Those are the original shocks? 100% time for a change.

 

This makes me favor the F350 PN.

 

Ive always run the max on all my vehicles. Thats generally 35psi, passenger cars and Jeeps. This is the second 250 Ive owned, drove many other F & E250/350s for work and all were set to 80.
I brought them down to 65. Noticeably softer/smoother for sure. Still have the vibe though, but its somewhat better. Purchasing 2016 18" take offs as we type. Shocks next. RS999042 front
RS999254 rear Per Matt.

 

Man, I must have no feeling on my backside because I just bought a 2016 F250 CCSB 4x4 two weeks ago and it has the FX4 and Camper packages.
I came out of a 2007 Tundra Double Cab 4x4 and my Super Duty rides like a dream compared to the Tundra.
A 3/4 ton truck is not going to ride like a marshmallow Cadillac going down the road. But, they don't ride like a buckwagon either. I am very happy with how mine rides, and so is my wife.

 

Then you've been running them overinflated

If you're running the stock size, then look at the doorjamb sticker for the manufacturer's pressure specification. For most cars and Jeeps and such with stock tires, this is pretty easy and normal. For a Super Duty, they're not generally going to offer a empty vs max capacity set of pressures on the doorjamb, so they're going to provide the specification for max capacity. For the 18" wheels, that's 65 PSI front, 80 PSI rear. The rear doesn't need 80 PSI unless you're actually towing or hauling heavy. See https://www.ford-trucks.com/forums/1...l#post10828776

 

Do you order a different shock if it has plow package taller front springs vs. the lower "standard" height front springs ?