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Old May 16, 2006 | 10:37 AM
  #1  
chrisBnn's Avatar
chrisBnn
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axel ID codes

I have two spare axels that have the following on the little tags

WDM-AG1 3LA
3.00 9 344A

and

WDM-S 9MO
3.25 9 313A

I know they are 9 inchers but i dont know what all the other stuff means . somebody help me out here.
 
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Old May 16, 2006 | 10:44 AM
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wintremute
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From: Graves County, KY
They are both open diffs, the first is 3.00:1 and the second is 3.25:1 ratio.
 
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Old May 16, 2006 | 10:59 AM
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chrisBnn
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Dang i was hoping to find a limited slip or something else i am tired of doing one tire burnouts. Do you think the 3.25 gear would help my gas mileage? Right now I have 2.75 gears in a 79 F100 302 and get 12-13 miles a gallon.
 
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Old May 16, 2006 | 12:41 PM
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Mil1ion
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With the 2.75's you already have the best axle for the best fuel economy.

LS diff tags have an L in the ratio code ie: 3L50

All those other codes of which you speak relate to:
The casting plant = 344A
The Date = 9M0
The Bearing info = WDM -??
 
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Old May 16, 2006 | 01:22 PM
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wintremute
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From: Graves County, KY
Originally Posted by chrisBnn
Dang i was hoping to find a limited slip or something else i am tired of doing one tire burnouts. Do you think the 3.25 gear would help my gas mileage? Right now I have 2.75 gears in a 79 F100 302 and get 12-13 miles a gallon.
Depends on where you're driving. Most of my driving is in city traffic, so I think swapping my 2.75 for 3.25 or 3.50 would help my mileage. The motor wouldn't have to work as hard to get me rolling. Highway mileage would suffer though. I get 16 on the hwy and 8-12 in town. I RARELY top 45mph because traffic here is so horrible.
 

Last edited by wintremute; May 16, 2006 at 01:24 PM.
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Old May 16, 2006 | 02:33 PM
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Stop doing burnouts. That should help with milage.
 
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Old May 16, 2006 | 03:04 PM
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Chris.
Read post #17.

https://www.ford-trucks.com/forums/s...d.php?t=102632
 
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