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Old 04-08-2009, 03:53 PM
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Help How Do i upgrade My 04 f350 suspension to 450

Just wondering how and if its possible to swap a 350 suspension for a 450,,,i need more beef in my suspension i currently have to replace balljoints every year and my current suspension cant handle heavy loads,,,,lift kits arent an option and airbags dry rot with the winter conditions and living by the ocean,,,what can i do other than buy a duallly?
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Old 04-08-2009, 05:25 PM
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you can put the 450 springs on the back but the ride is gonna be real hard, you could probably change the front leafs out for the 450 springs too, but I am not 100% sure on that part..I do know it will ride horrible with 450 springs.
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Old 04-08-2009, 05:31 PM
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Is your truck a 2WD or 4WD? If it's 2WD I wouldn't even bother since the 2WD F450's and F550's have a straight axle. You have a SRW. F450 axle is gonna look wierd on that that.
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Old 04-08-2009, 05:48 PM
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Originally Posted by Abrannan19 View Post
you can put the 450 springs on the back but the ride is gonna be real hard, you could probably change the front leafs out for the 450 springs too, but I am not 100% sure on that part..I do know it will ride horrible with 450 springs.
Hey Adam Havent talked to you in a while hope all is good fyi sct is suppppppeerrrr goood just waiting on my studs to be installed,,, so my dilema is i need to upgrade my suspension i was told to try and get 450 parts but was unclear with that,,,,my current front leaf count is 2 in the rear are the regular leafs the helper spring doesnt due much its always bottoming out,,,airbags dontt last up here the only other thing i can think of is the hellwig helper springs,,, as far as the front leafs go i want tto add atleast one more if not upgrade that set,,, i guess i wouldnt mind a stiffer settup the whole balljoints every year thing is getting annoying!
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Old 04-08-2009, 05:55 PM
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Originally Posted by 2005F250 View Post
Is your truck a 2WD or 4WD? If it's 2WD I wouldn't even bother since the 2WD F450's and F550's have a straight axle. You have a SRW. F450 axle is gonna look wierd on that that.
its a 4wd,,,,, yea i figured adding 450 parts would make thing not look right i swear my current suspension just sucks dunno should i just replace all the original leafs,,,seems like everyone makes lift kits but noone makes a heavy ^ss duty suspension kit
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Old 04-10-2009, 02:15 PM
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Thats it 2 replys........no one else has any advice dammmm thats pretty dissapointing
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Old 04-10-2009, 03:27 PM
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Got to a local shop and have them made.... I would personally get air bags. Given your situation and them cracking custom made would be the key. If you find a competen shop they should be able to get you set up.
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Old 04-10-2009, 03:50 PM
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Have you tried a spring shop for trucks. I did this with a 97 Dodge and they added 2 leafs to each side and it helped a lot.
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Old 04-10-2009, 03:53 PM
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not sure if they can but I would call either alcan or deaver and see if they can make you some custom springs.
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Old 04-10-2009, 10:12 PM
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I think the 450 has a wider front axle but I dont know if it would affect anything by just using pieces.
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