spindles & axles

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Jan 20, 2003 | 02:51 PM

6 cyl boy

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From: Irvine

spindles & axles

Hello all,

I not sure if this is the place to post this question but I figured who would know better than the folks on the 1967-1972 forum.
My question is two part, and is in reguard to my 1972 F-100. first; Is their an eight(8) lug axle for the ford 9inch? Second; Is their any difference between the front spindles for eight(8) lug versus five(5) lug hubs. I can't seem to find a seperate wheel bearing listing for the 8 vs 5 lug hubs, which would lead me to believe their is no spindle difference between the two. Thank you for any help you can provide.

Jan 20, 2003 | 04:53 PM

Hawkeye58

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From: Las Vegas

spindles & axles

The spindles on an F250 are a larger diameter for the wheel bearings, also require a larger diameter King pin set, hence the need for the correct set of I-Beams to mate with them. I am currently in midlle of doing a Disc conversion on my F250 , at the same time converting to a half ton. I have found the differences between my parts as I mentioned above. No where have I found however that you can put 8 bolt stuff with the 5 bolt stuff, the only option I know of at this time would be to get a wheel adapter that goes between the rim and hub and that would be made to have the 8 bolts and holes to attach to the 5 bolt hub.

Hawkeye

Last edited by Hawkeye58; Jan 20, 2003 at 05:03 PM.

Jan 20, 2003 | 05:30 PM

6 cyl boy

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From: Irvine

spindles & axles

Hawkeye,

What do you mean by converting to a half ton? Also will the F-250 I-beams fit the F-100 or are their frame differences?

Jan 20, 2003 | 05:40 PM

Hawkeye58

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From: Las Vegas

spindles & axles

I am converting my F250 by putting a 1/2 ton 9" rear differential (5 bolt) onto my truck. On the front it will have the 1/2 ton (light duty) disc brakes (five bolt).
The F250 came with the 3/4 ton set up Dana 60 rear end and heavy duty drum brakes front and rear ( eight bolt set up).
So, I'll have a half ton truck when I finish,
I know that is backwards to what most people do but, that's what I want.
The frame is same in regards to where everything bolts up. My rear springs are different but will still use the same hangers. I don't know if the frames differed in strenght or size, I think they were same on F250 and F100.

Hawkeye

Jan 20, 2003 | 05:54 PM

Post Fiend

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From: Brea CA

spindles & axles

F250 frames are stronger than F100 but I don't have the numbers right in front of me.

Barry

Jan 20, 2003 | 07:10 PM

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From: Brea CA

spindles & axles

Ok here are some numbers. Comparing 131" wheelbases, the F100 frame has a section modulus of 3.06 vs 3.89 for the F250 frame.

For 4x4 longbeds, you're looking at 4.14 vs 5.58.

It's been a while since I had physics but I know the higher the number, the stronger. Any ME's here?

Barry

Jan 21, 2003 | 05:14 AM

Hawkeye58

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From: Las Vegas

spindles & axles

Thanks for that info Barry.
You lost me there with the figures.
But, it's good to know that the frame on the F250 is beefyer.

Oh, By the way 6 Cyl Boy, the F250 I-Beams should bolt right up to the F 100.
The f100 I-beams I got are going to bolt right in on my F250 I'm told.

Hawkeye

Last edited by Hawkeye58; Jan 21, 2003 at 05:20 AM.