Ring gear Diameter

[Black06]

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

 

[Buffs F-350]

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]

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.

 

[fordtrucker4life!]

My 97 250 has a 10.25 ring gear. I thought the sd's were all the same 10.50, but have heard otherwise.

 

[Kleetus]

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]

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.