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Old 01-16-2018, 08:51 PM
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another spring ?

So I want to do a spring swap on the Ex. And yes I have read thru almost every thread for spring swaps on here and understand the majority of it. However I am looking at getting used springs from 2 donor trucks and need some help. Ill post pics of the door numbers so you all can help me and see if it will work for my application. The 05 I am looking at getting the rears. I cant find what code these would be and how that would relate to the overall stance of my truck. the 00 truck I dont think im going to get because the very least I want is V codes and these seem to be U codes correct? but without knowing about the rears on the 05 I have no idea whats fronts I would need if I ended up getting those. Sorry if this seems ridiculous but I am in spring overload info right now and cant figure out what I need to do. Thanks in advance


 
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Old 01-16-2018, 09:05 PM
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F codes are same as B codes.
 
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Old 01-16-2018, 09:07 PM
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awesome so I will go ahead and get the rears and then probably just buy new V codes for up front. Thanks again
 
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Old 01-16-2018, 09:14 PM
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I have V codes. I like them, but wish I had gone X codes.
 
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Old 01-16-2018, 09:17 PM
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I keep hearing that but then what would that do to the rear would I have to go up to another spring in the rear?
 
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Old 01-16-2018, 09:19 PM
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X codes with modified F codes should have you level.
 
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Old 01-16-2018, 09:26 PM
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great thanks again. Just texted the guy with the rears I will be picking them up thursday. Super excited, now to get the x codes.
 
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Old 01-17-2018, 11:10 AM
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Originally Posted by Nicmike View Post
F codes are same as B codes.
They are not the same rate, B and P are.
B code is 320/670
F code is 334/777

HTH
 
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Old 01-17-2018, 04:15 PM
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I have v and modded b and if I would do it again I would get the x codes for the front. I added a leaf from the old rear pack to the front get the front a little higher. The v codes are great no complaints on performance Just would have liked the nose up a little more Plus I ended up with a plow.
 
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Old 01-17-2018, 05:53 PM
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Originally Posted by ithaca1230 View Post
I have v and modded b and if I would do it again I would get the x codes for the front. I added a leaf from the old rear pack to the front get the front a little higher. The v codes are great no complaints on performance Just would have liked the nose up a little more Plus I ended up with a plow.
Exactly how I feel, with exception of the plow.
 
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Old 01-17-2018, 06:08 PM
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Originally Posted by Nicmike View Post
Exactly how I feel, with exception of the plow.
Me three! Next time W or X codes. I may add my overload spring from my C's.
 
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Old 01-17-2018, 06:25 PM
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Originally Posted by RobRoss View Post
They are not the same rate, B and P are.
B code is 320/670
F code is 334/777

HTH
so would i still be ok doing the x codes in the front and getting the F code on the rear?
 
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Old 01-17-2018, 06:59 PM
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Rob points out that they are different, however they are minimally different. B and F have the same weight carrying capacity (I think that is the right term). Many X owners have F codes on their Excursions...both modified and unmodified. There are write ups on the web detailing the F code spring mod. They will work fine, and they will give you about the same "lift" in the rear as the B codes. I have laid F and B codes next to each other, and the spring arch is identical with the naked eye. Your EX will squat a little less with a heavy load on the bumper with an F code vs the B codes, as the secondary spring rate is stiffer on the F code. I say, "this is a good thing".

FWIW, the F codes replaced the B codes on the Super Duty pickup trucks.
 
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Old 01-17-2018, 08:22 PM
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Originally Posted by RobRoss View Post
Me three! Next time W or X codes. I may add my overload spring from my C's.

X codes with the rear overload leaf added, that would be crazy!
 
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Old 01-18-2018, 10:11 AM
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Originally Posted by WE3ZS View Post
X codes with the rear overload leaf added, that would be crazy!
No, I mean to my existing V codes...there is only one guy crazy enough to do that and document it!
 
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