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4th Gear
Joined: Jun 2024
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Question.
I'm thinking of getting a 2000 f550. Only issue is it is 2wd. If I were to swap it to a 4wd would I also need to change the rear axle or can I leave the original axle in the back and get a new front one with the same gear ratio? If I don't need to replace the rear axle then do I need to get a front one from the same year as the rear?
Laughing Gas
Joined: Feb 2014
Posts: 817
Likes: 297
From: KY
There would be no reason to swap the rear out provided it has the same gear ratio. A 550 is leaf sprung isnt it? IIRC the early SD's 250/350 used a D50 front and the 450/550's SD's used a D60 which is stronger. Might be a bit tough to find a wrecked F550 for parts but who knows.
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4th Gear
Joined: Jun 2024
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There would be no reason to swap the rear out provided it has the same gear ratio. A 550 is leaf sprung isnt it? IIRC the early SD's 250/350 used a D50 front and the 450/550's SD's used a D60 which is stronger. Might be a bit tough to find a wrecked F550 for parts but who knows.
Tuned
Joined: Dec 2015
Posts: 349
Likes: 72
From: Seguin, Texas
The last f550 we had at work that was 4x4 which was a 1999 model used a dana 60 leaf sprung front axle, it used regular 8x170 hubs but had the hub adapters to go to the 550 wheel bolt pattern. you will more than likely need to regear the front axle unless you find one from an f550, most had like a 4.88 gear ratio.
good luck.
good luck.
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