430 rear end

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Mar 12, 2008 | 08:45 AM

reckseck

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430 rear end

Does anybody out there know what is involved to change my 430 rear end to a 373. I have a 06 F-350 6.0 diesel
Would appreciate any info.
Thanks

Mar 12, 2008 | 09:55 AM

cgl

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Joined: Apr 2000

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From: NorCal

Is it a Dually? 4x4? why would you want the higher gears? You'll obviously need the new ring and pinion and possibly a new carrier, depending on what gear manufacturer you're getting. It's usually a shop job and it'll cost around $1000, parts included.

Mar 12, 2008 | 11:04 AM

reckseck

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Yes it's a dually, I need to get some better fuel mileage, so elect the higher setting. The 430 rear end has me down to 12.4mpg

Mar 12, 2008 | 11:17 AM

mizzitch

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Joined: May 2004

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get a gear vendor's underdrive unit - it will cost about the same as switching the gearing if you have 4x4

Mar 12, 2008 | 11:27 AM

MitchPeters

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Joined: Feb 2003

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From: Alexandria, Ohio

Why does 500+ lbs/ft of torque need a 4.30 axle?

Mar 12, 2008 | 11:35 AM

1 Ton Tommy

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I have pondered giving up my 3:73 gears on my '06 F-350 diesel for more low end starting power. If you pull with your truck, and starting loads is an issue, I wouldn't give up the lower gear ratio. Poor mileage stinks, but not being able to pull really, really, stinks!!! I am only getting 14 mpg with my single axle and the 3:73.

Mar 12, 2008 | 03:17 PM

edjunior

Cargo Master

Joined: Jan 2007

Posts: 2,243

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From: Roman Forest, TX

Sheesh, 12.4 with a dually sounds pretty good. I really don't think with a 3.73 you're going to do a whole lot better, but if it makes you feel better, more power to you. You should take it to a shop and get an estimate on the price there. The parts alone are gonne be around 400 - 700 dollars (if I remember correctly).