shaynet

Does anyone know if the axles/centre in a F100 9" diff are likely to be 28 spline or 31 spline?

Actually, the diffs from an F100 ambulance and is a drum brake model.

Also, any clues as to what ratio its likely to be?

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The cop said "Do you know why I pulled you over". I said " Well, that all depends on how long you have been following me!"

brenx

If I remeber correctly? 31 spline.

Still doesn't stop you getting a cheap 31 spline diff and changing the spider gears or shortening axles to suit.

Generally around 3.5-3.7. 4.11's can be found also.

Brenden