Front Spring Codes

[RescueF250]

Anyone have info on the different codes for Front Springs on 99-04 trucks. Ive seen S, T, U, V and X classifications

 

[BigAlsPSD]

Any pickup can have any available front spring code - depending on options, and it doesn't matter whether F-250, F-350 SRW or F-350 DRW. Here are the spring codes for the front leaf springs on '99 thru '04 PSD 4x4 pickups:

T = 4,400 pounds @ground
U = 4,800
V = 5,200
W = 5,600 (rare on a pickup)
X = 6,000 (only with snow-plow pkg on a pickup)

Rear spring codes:
A = F-250 & Excursion (6,084 pounds @ground)
B = F-350 SRW (6,830 pounds @ground)
C = F-350 DRW (8,250 pounds @ground)

 

[RescueF250]

So U n V best for front and A n B for rears then.

 

[rat49f6]

Op are u looking for diffrent front springs?

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[OBSWIZ]

I would never use U codes on a SD with a Diesel..not rated to carry the weight.

 

[rat49f6]

For some reason the srw cab and chassis parts truck I have is u code front with a factory 7.3

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[OBSWIZ]

Doesn't change the facts.....

 

[dzldoctor]

So the ratings are for a pair?

 

[rat49f6]

Obs trucks came with u codes with a diesel too ... Both the c&c and work obs sit just fine with the u codes
And both have plows
Obs even clears 285s on original u codes from 97 ...all while hanging a 8 foot western plow

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[rat49f6]

I take that back the work obs is 8 front spring code but it is still 4800lb front axle gvw

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[OBSWIZ]

Yes.............pair

You cannot compare a OBS spring to a SD

 

[rat49f6]

Wiz you are by far more schooled on this don't get me wrong but y would 4800 # front able gvw be ok on a obs but not on a sd?

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[OBSWIZ]

Who says its OK...IMO its not OK just because Ford builds it, that doesn't make it right..case in point look at the thousands of Excursion's with U codes that destroy the bump stops and bottom out...same for some F250-350's..

'05 up's that do not have enough Castor and Radius arms that bind

SD U codes will have a neg arch...Never seen a OBS good condition spring do that..its a different spring.

OBS trucks are lighter than a SD also...

 

[rat49f6]

I was not aware that sd were a heavier truck... Thanks for the lesson

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[RescueF250]

Actually gonna lower my truck. Since I have Shackles and hangers on the front just go throw stock springs and still have 3.5 lift and stockers in the rear.

 

[dentexpowerstroke]

how do you know what the spring code is? my front are getting a negative arch and from what obswiz says I'm wondering if they are u codes

 

[OBSWIZ]

Look at the door-pillar sticker..under spr the first letter in the front spring code.

 

[rat49f6]

on the door tag

 

[dentexpowerstroke]

U on the front... Probably why it's sagging. maybe I should just get a different spring code instead of leveling it.

 

[OBSWIZ]

V codes will lift aprox 2", X codes aprox 3.5"