Rear axle code help
Thread Starter
|
Senior User
Joined: Feb 2017
Posts: 100
Likes: 0
Rear axle code help
Apparently I'm one of the few lucky ones who bought a truck with the ID tag still on the axle. I found a site that tells me most of the info. But I can't tell if this is an open or Trac-Lok differential. Code reads as follows.
WDM-AG1 4FA
3.00 9 344A
This is on a 74 F100 2WD. Any help is appreciated.
WDM-AG1 4FA
3.00 9 344A
This is on a 74 F100 2WD. Any help is appreciated.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
Apparently I'm one of the few lucky ones who bought a truck with the ID tag still on the axle. I found a site that tells me most of the info. But I can't tell if this is an open or Trac-Lok differential.
Code reads as follows: WDM-AG1 / 4FA / 3.00 / 9
This is on a 74 F100 2WD.
Code reads as follows: WDM-AG1 / 4FA / 3.00 / 9
This is on a 74 F100 2WD.
4FA = Assembled the first week (A) of June (F), 1974 (4).
Thread Starter
|
Senior User
Joined: Feb 2017
Posts: 100
Likes: 0
So my suspicions were correct. I've got a peg leg. Thanks for the help!
Elder User
Joined: Oct 2016
Posts: 712
Likes: 1
From: Mesa, AZ
Another quick and dirty way to tell is to jack up under the diff, put in neutral, and spin a tire. If the opposite side spins in an opposite direction, it's open; if it spins the same direction it's locked or has a functioning limited slip.
Thread Starter
|
Senior User
Joined: Feb 2017
Posts: 100
Likes: 0
I was preparing to do just that when I noticed the tag buried under years of dirt.
Thread
Thread Starter
Forum
Replies
Last Post
Baja16
Clutch, Transmission, Differential, Axle & Transfer Case
17
May 16, 2013 11:59 PM
pditmars
1999 - 2003 7.3L Power Stroke Diesel
4
Jan 19, 2005 11:42 AM
