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-   -   Fx4 vs XLT suspension -what's the difference? rough ride (http://www.f150forum.com/f4/fx4-vs-xlt-suspension-whats-difference-rough-ride-233038/)

Moremoney 11-02-2013 09:19 PM

Fx4 vs XLT suspension -what's the difference? rough ride
 
Just wondering what the difference is? My truck feel super stiff hitting everybump in the road,I'd compare the ride to a dump truck. It's a 2007 FX4 supercrew wth a 2" level and 285/65/18 nitto terra grapplers and has only 130 000kms on it. That's it, otherwise bone stock and the ride was stiff before the wheels and level. Today I drove my buddies 06 supercab with
300 000 on the chassis and it drives like a cadillac compared to mine.

So what are the differences?

What can I do to soften it up? Struts and shocks? OEM or do I have to go aftermarket? My bushings appear to be in good shape. Truck is pretty mint.

John Read 11-03-2013 12:20 PM

If you are using a spacer to level I would start here.

http://www.f150forum.com/f4/2004-200...-guide-232015/

dbhost 11-03-2013 01:01 PM

The coils are different... The Rancho Quicklift Loaded has a softer spring rate...

05norcal150 11-03-2013 11:30 PM

I'm also interested, I love the ride of my leveled xlt 4x4...I'd love to hear if there's an official reason in different ride quality

techrep 11-04-2013 06:29 AM

Quote:

Originally Posted by John Read (Post 3074110)
If you are using a spacer to level I would start here.

http://www.f150forum.com/f4/2004-200...-guide-232015/

the spacer goes on top of the strut and coil...has nothing to do with the ride as far as stiffness..

FordSilly 11-04-2013 08:22 AM

Quote:

Originally Posted by dbhost (Post 3074172)
The coils are different... The Rancho Quicklift Loaded has a softer spring rate...

In my truck a lariat, the ranchos are riding much stiffer than the Oem struts, with the adjuster set to zero. Not terrible nut noticeable.

Dirttracker18 11-04-2013 10:49 AM

My first question in this case is always,

What air pressure are you running in your tires?

homer 11-12-2013 03:16 PM

As Dirttracker18 asked, what pressure? Are these E rated tires? I run the exact same tires (Terra Grapplers), it's ROUGH! I've switched to Bilstien 5100's (although they're offroad shocks too) and no improvement. I have a 2.5" level but the truck was rough even before that.

I'm actually more convinced at this point it's the E-rated tires (in combination with air pressure of course). I haven't had a chance to throw a different set of tires on yet. My winters are also E-rated so I don't find any difference there either !

FordSilly 11-12-2013 08:20 PM

I run the Pirelli scorpions on Oem 20's at about 35psi

Moremoney 11-12-2013 08:24 PM

Quote:

Originally Posted by homer (Post 3092806)
As Dirttracker18 asked, what pressure? Are these E rated tires? I run the exact same tires (Terra Grapplers), it's ROUGH! I've switched to Bilstien 5100's (although they're offroad shocks too) and no improvement. I have a 2.5" level but the truck was rough even before that.

I'm actually more convinced at this point it's the E-rated tires (in combination with air pressure of course). I haven't had a chance to throw a different set of tires on yet. My winters are also E-rated so I don't find any difference there either !


Yeah sorry for the reply. Truck rode rough with the stock 20's and all seasons I had before and only seemed to be even worse after switching to the fuel wheels and 18" terra grapplers.

I was running too much pressure in them, had them at 38 for towing. I have lowered them to 32 and there is a noticeable improvement. However it's still very stiff.

I was thinking of eventually switching to some KYB shocks to soften it up


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