Axle ID

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Aug 21, 2007 | 06:31 PM

foreman1063

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Axle ID

I'm trying to determine what rear axle is under a salvaged Ford truck I found. The truck is an 85, f250 xcab, long bed with the 6.9 diesel. The rear GVWR is 8500. The axle is a full floater and is about 65" wms to wms. The only marking on the housing I saw was "70-16u". I'm trying to determine if this is a Dana 60, 70 or even a Ford 10.25".
I went to a Ford parts dept but they said the truck was too old to get axle info from the VIN. Any help would be appreciated. John
VIN 1FTHX2513FKA72139

Last edited by foreman1063; Aug 21, 2007 at 06:51 PM.

Aug 22, 2007 | 02:34 PM

7K42S

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If it has the 70-16U stamp,it is a Dana 70U. Was production between 9-84 and 2-85?

Aug 22, 2007 | 03:19 PM

foreman1063

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Thanks for the info. What exactly does the "u" mean, any idea? Also by looking at this link and the VIN https://www.ford-trucks.com/article/...de_Chart_.html
It appears that this axle has a 4.63:1 ratio. Am I reading this correctly. Thanks, John

Aug 22, 2007 | 03:44 PM

fatazz350

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you can also find info at dana.com. all the manuals and stuff are downloadable. i've got a lot of good stuff there.

Aug 22, 2007 | 04:00 PM

7K42S

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The 70U uses smaller bearings than the 70HD. It should be a 3.54 or 4.10.

Aug 22, 2007 | 04:53 PM

foreman1063

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Thanks for all the help guys. The Dana site is definitely helpful as well. Looks like I'm taking a ride out tomorrow to get the BOM off the axle and and to pull it off the truck. Thanks, John