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Old Mar 5, 2004 | 07:49 PM
  #1  
80Ranger's Avatar
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Rear end Code Help

I got a 1980 F-150 4x4 351M 4speed. On my rear end I.D. I came up with (WFE AW 9M20)
(31.5 S319A)
Can someone Please help with code I need to replace a bent axle.
 
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Old Mar 5, 2004 | 08:38 PM
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sty
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From: Hamilton Ontario
Walk into a Ford dealer with those numbers , I did , and they are more than willing to help. Or , if u r sure the rear end has never been changed , go by the sticker in your door jamb.

Good luck

Sty
 
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Old Mar 5, 2004 | 09:44 PM
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From: Dryden, ON, Canada
For an 80 F150, it's a 31 spline 9" rear end.
Check that bottom row of numbers again. You're missing numbers
 
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Old Mar 6, 2004 | 10:53 AM
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Yup missed a couple numbers tag reads
WFE-AW 9M20
31.50 9 S319A
 
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Old Mar 6, 2004 | 11:02 AM
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That's actually 3L50, you've got a 3.50:1 geared limited slip 9" there
 
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Old Mar 6, 2004 | 11:55 AM
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I don't think its 3.5 this thing cranks 2500rpm at 60
with 30" tires
 
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Old Mar 6, 2004 | 03:34 PM
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If it doesn't have OD then sure...and your speedo might be off. The more accurate way to tell (as someone may have changed it) is to jack the two rear tires off the ground and spin 1 tire 1 revolution and count how many times the driveshaft spins. Also, if the tires rotate in the same direction it's a limited slip..if opposite direction...open diff.
 
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