Rear End Tag

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Jan 22, 2008 | 12:19 AM

toolman

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From: Spokane, Wa.

Rear End Tag

So, not wanting to beat a dead horse...but I'm having some rear end vibration and found a u-joint on it's way to the afterlife. I knew the rear end had been swapped out, so I sprayed and scraped the tag hoping to ID it. Yhere were two lines of text stamped into it.

The upper one read " S318d "( ok so there were some spaces but my wife was making notes for me and scrunched them together ) The lower line read
" 3 50 9 5K01 "

Is this an open 9" rear end with a 3.50:1 ratio ?

Do the other numbers mean anything ?

Thanks !

-Scott in Spokane

Jan 22, 2008 | 12:22 AM

Surge08

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From: Somewhere In FTE Land

Means you have a 3.50 gear ratio

Jan 22, 2008 | 08:57 AM

toolman

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From: Spokane, Wa.

What I'm really looking for at the moment is what rear end it is. The auto parts store lists 2 different U-Joints ( one being for the 8.8" and the other being for the 9", with one being slightly larger than the other ) Also, it was my understanding that the 9" had a removable 3rd member and the 8.8 had an inspection cover.

THANKS !

-Scott in Spokane, Wa.

Jan 22, 2008 | 11:48 AM

Surge08

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From: Somewhere In FTE Land

The 9 in the take mean 9 inch rear. If it was a 8.8 it would say 350 8 8 5k01

Jan 22, 2008 | 12:27 PM

andym

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From: Bonita Springs FL

An 8.8" was never available with a 3.50 gear ratio. You definitely have a 9".

The year would also help confirm this, as the 8.8" started in 1983 and was phased in until about 1986.

Jan 22, 2008 | 12:38 PM

helirich

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As you said, the 8.8 has a tin cover on the back. The 9" has a third member.

Jan 22, 2008 | 08:31 PM

justshootme84

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From: SE Texas

Quote:

Originally Posted by toolman

So, not wanting to beat a dead horse...but I'm having some rear end vibration and found a u-joint on it's way to the afterlife. I knew the rear end had been swapped out, so I sprayed and scraped the tag hoping to ID it. Yhere were two lines of text stamped into it.
The upper one read " S318d "( ok so there were some spaces but my wife was making notes for me and scrunched them together ) The lower line read
" 3 50 9 5K01 "
Is this an open 9" rear end with a 3.50:1 ratio ?
Do the other numbers mean anything ?
Thanks !
-Scott in Spokane

Like the others have said, that tag says it's a Ford 9", 3.50:1 open gears ( no factory L/S). The other numbers are build date and BOM numbers (bill of material), used when you need to order parts like gears or axle, bearings, etc. JSM84