Ring gear Diameter

Black06

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2006 FX4 Single with a 3.73. Wondering what what the ring diameter is ?
 

Buffs F-350

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If it is a 250 it is a 10.25 a 350 is is 10.50. Same housing different ring gear. But there may be some oddballs out there.
 

Fire1

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I believe that older models (90's) had the 10.25. All superduties should be 10.5". They are not different between 250 and 350 except the duallies.
 

Kleetus

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According to the service manuals (2006), the 250 has the 10.25, and the 350 has the 10.5... 450 and 550 change again.

I assume the question is because you're looking to change ratios?
 

Buffs F-350

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Most 350 duellys are a dana 80 the 450 is a dana 110 If I remember correctly. My 2002 f 250 superduty had a dana 50 front and a sterling 10.25 rear my current 2006 f 350 has a dana 60 front and sterling 10.50 rear. I beleave all superdutys have a dana 60 front after 2004 but the rears are still mached the same. But as I said there could still be some oddballs out there.Just cheak the axl tags.
 

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