Dana rear end help!!!!!!!

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Apr 16, 2013 | 09:11 AM

Feardeere7

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From: Michigan

Dana rear end help!!!!!!!

I need help!! I am trying to figure out exactly what rear axel and gear ratio I have in my 2wd 1975 f350 Supercab. This would be all great and dandy if I had a warranty plate on my truck but I don't. I have tried searching my vin (000000F35JKX01475) everywhere and still haven come up with anything. I think that it is a Dana 70 due to the 70 on the right side of the pumpkin where Dana stamps there model #, but I do not know for sure. I think the ratio is eather 4:10, 4:11, or 4:56 but i need to know exactly what the ratio is. Ill do my best to awnser any questions you guys have.

Apr 16, 2013 | 09:37 AM

HIO Silver

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From: NorCal

'Look up the BOM (Bill of Materials) number stamped on the axle. The Dana reference catalogs are linked in the tech thread sticky.

Apr 16, 2013 | 09:56 AM

Feardeere7

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From: Michigan

Okay, the BOM is located on the long axel tube ( right side if looking form rear) correct?

Apr 16, 2013 | 10:51 AM

montana_highboy

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From: Big Sky Country

Apr 16, 2013 | 12:20 PM

Feardeere7

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From: Michigan

Quote:

Originally Posted by montana_highboy

Thanks Montana, that was the pic I was looking for.
I got another question, on the left side of the pumpkin in the same location that the model # is on the right is a 5. Anyone have any idea what this means?

Apr 16, 2013 | 06:39 PM

Sooper Camper

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From: Sandy Eggo

there should also be a tag held on by 1-2 of the cover bolts with the ratio stamped on it. if there is an L between the numbers ie 4L11 then it has a limited slip differential.