F350/F250 Rear Leaf springs the same? - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 07-16-2007, 04:07 PM Thread Starter
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F350/F250 Rear Leaf springs the same?

Been debating a 4" Lift kit, or doing the F350 Blocks and a level kit. Decided on the slightly taller stock F350 blocks; don't want it much bigger. My question is, are the rear leafs on a 250/350 the same part #? Just wondering if they are the same height and just stiffer, or maybe taller and stiffer?

So in the rear, the differences are 1- shocks. F350's are a bit longer. 2- Blocks, the 350's are about 1-3/8" taller IRC (along with longer U-bolts). 3- Springs??


Upfront I'm going with a Superlift 2.5" Level kit. The expensive one that fixes the geometry. I currently have the 2.5" spacers and the truck looks GREAT upfront, but rides like crap. Noticably worse. My goal is to have a Stock F350 height and level it (correctly). throw some bigger tires on my stock 20's and call it good.

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Last edited by JBakerFX4; 07-16-2007 at 04:12 PM.
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post #2 of 7 Old 07-16-2007, 04:17 PM
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Sounds like you've got it figured out, need some pix now LOL!!!

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post #3 of 7 Old 07-16-2007, 04:26 PM
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I am wondering the same thing about the springs. I dont have a 250 to look at but if my memory serves me well, it appears that the mail leaf is thicker on the 350 and that the is one more leaf than on a 250. i have a 350 sitting in the shop now but no 250s on base that i have seen. get a pic of your spring pack and we can compare

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post #4 of 7 Old 07-16-2007, 04:45 PM Thread Starter
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I can snap a pic of my leaf pack tomorrow.

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post #5 of 7 Old 07-16-2007, 05:24 PM
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ok, these trucks arent going anywhere soon, so not a problem

2001 F-250 X-Cab 4X4, Edge EVO, DIY Tymar, Map Fooler, FPR Shimmed, 4" exhaust into 7" GR Bullhauler stacks, 3.5" fabtech lift,35x12.50 procomps, 18" DEJ cannon wheels, Custom built RobTrans, HD U-joints, Trip A-pillar Guages, 2 12" rockford subs 1500watt rockford amp and Eclipse head unit, More to come!
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post #6 of 7 Old 07-16-2007, 07:42 PM
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Yes the springs are the same for the 250-350. It all depends on what suspension packages you get. There is information somewhere that shows the spring rates for both trucks and they are the same. If you want to lift the truck with factory springs get x-code springs and they will lift the truck the most.

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post #7 of 7 Old 08-23-2007, 01:24 PM
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revisiting this subject....
My lift on the 2wd ended up being about 6" in the front and roughly 3" in the rear just using blocks on the stock springs. All in all, my front end sits about 1-2" taller than an FX4, but the rear is about the same height as theirs. Can I switch to the 350 springs in order to get another few inches of lift back there to level the whole thing out?

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