I recently discovered that I have the X code front springs. It came stock with the V code. I got to looking around because they looked newer and the truck seems to sit level. My question is how can I determine if I have upgraded rear springs? It came stock with A code springs but they look newer as well.

 

Is there a spray painted stencil tag on it?? My springs have the PN's sprayed on. You could measure ride height and compare to a V code truck. How many leaves are there?

 

Thanks for responding!
There are 5 springs and 1 up above. The bottom ones have a Ford # stamped on them; RPN 1792 2C34 CA. The top one has RPN 1682.
Hope someone knows what that means.

 

Oops, I was thinking you were asking about identifying X codes. I am not sure on the rears, I think they used different spring steel but usually the same number of leaves in the rear. You might want to try and contact partsguyed to see if there is a way to cross match that PN with a code...

 

Walt, I'm bumping this up, hoping you can help me on this.

Thanks!

 

Ok here is the info from the tech folder on rear springs:

Rear Springs — F-Series
L — Rear air suspension
B — 1C34-5560-CB, F-250, F-350
C — 1C35-5560-DB, F-250, F-350
D — YC35-5560-EA, F-250, F-350
M — YC35-5A975-AA, F-450, F-550
N — YC35-5A975-BA, F-450, F-550
Auxiliary Springs — F-Series
A — YC35-5588-A (wide frame)
D — F81A-5588-D (narrow frame)
Rear Springs — Excursion
Base part number — 5560 (RH/LH)
Pre-fix — YC35
A — Suffix A
Pre-fix — 1C34
B — Suffix B +


Super Duty Series/Model: F-250/F-350 SRW Pickup
Combined Rating @ Ground: 6830 pounds (lbs.)
Number of Leaves: 6
Total Thickness @ Pad: 3.86 inches (in.)
Overall Length: 58.1 in.
Width: 3.00 in.
Deflection Rate (lbs. per in./ spring): 320/670/1209
Rating Each @ Pad (lbs. per spring): 3603


Tech folder for those that dont know about it.
https://www.ford-trucks.com/forums/4...lder_____.html

 

Thanks for the info Walt. I may be a little dense, but I don't see a connection to my spring #'s. I have the ford logo stamped on mine, and if you look at Post #3 that's all I can see on mine.
The history of my truck as I know it; Originally if came with the V in front and A in back, according the door tag. Someone removed the front sway bar and added the X springs in front. They had a fifth wheel hitch of some sort in the rear, and the springs don't look like original. That is by the general appearance of them, rust etc. I would like to know what I have, for future reference for towing, etc.