IN NEED OF A 9" DRIVER'S SIDE REAR AXLE SHAFT

THE FRENCHTOWN FLYER

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I have a 9" rear axle in a champ car project that purportedly came from a Bronco. The trouble is the axle dimensions do not exactly match anything I see listed.

Here are the specifications:|
9" rear - round back housing
5 x 5.5 bolt circle
11" x 1.75 brake shoes
2 375 x 3.5 x 1/2" bolt circle
big bearing ends 3.150" diameter
28 splines
30" length to wheel mounting flange

Does anybody know of a Bronco axle that matches this?

I'm beginning to think it may be a F-100 or F-150.
 

BigBlue94

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Cant help decipher which one, but F150 through 83 had the 9". F100 would be the same axle, but could also be an 8" diff with a 5 on 4.5" pattern. 30" certainly makes me think its NOT from a 66-77 bronco. Big bearing would be '74 and later IIRC.

I know broncos with the 8.8" used two different lengths of axle shaft, depending on driver or passenger side. Econoline used equal length axle shafts in the 8.8. Broncos were pretty much all 8.8" by 84 or 85 but F150 could have a 9" all the way through 1991.


A short bit of digging found that 78 and 79 bronco 9" axle shafts are equal length and 31.xxx" long. But they seem to be 31 spline. Super cabs and F250 had different shafts.

This thread here seems to say that Econolines had a 28 spline 9"

https://www.fullsizebronco.com/thre...d-rare-9-inch-axle-id-it.104276/#post-1386442
 

chad

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go to classic broncos dot com for all things bronk.
It IS 28 spline, 5 on 5.5. (1965.5 - 1977).
They play a lill nicer over there than they used to
(abt as bad a beating as on our Oz forum) so I'd not
stur the pot. I just trimmed a shaft for use. Nother
too long will be resplined & cut (more thana trim).
I'll watch'n C if U publish findings...
 
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