Rear Axle Code?
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Cross-Country
Joined: Sep 2007
Posts: 50
Likes: 1
From: Central Kentucky
Rear Axle Code?
I have a 2001 F350 Super Duty Power Stroke, and I'm trying to figure out what axle ratio I have. The certification label (door sticker) has code 41. I looked in the Tech folder in this forum, and there are two axle code charts. The first one is in an entry that decodes the entire label, and it says:
41 — 3.73 non-limited slip, F-350 (single rear wheels)
Then there's another chart down lower that only lists axle codes, and has less of them. It says
41- 4.10
Which do I believe? Or is the second one for some other set of codes, not the ones on the door sticker?
41 — 3.73 non-limited slip, F-350 (single rear wheels)
Then there's another chart down lower that only lists axle codes, and has less of them. It says
41- 4.10
Which do I believe? Or is the second one for some other set of codes, not the ones on the door sticker?
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
If you're looking at the door sticker, use these codes:
AXLE CODES:
37- 3.73
3L- 3.73 LS
41- 4.10
4N- 4.10 LS
43- 4.30
4L- 4.30 LS
48- 4.88
8L- 4.88 LS
53- 5.38
5L- 5.38 LS
AXLE CODES:
37- 3.73
3L- 3.73 LS
41- 4.10
4N- 4.10 LS
43- 4.30
4L- 4.30 LS
48- 4.88
8L- 4.88 LS
53- 5.38
5L- 5.38 LS
New User
Joined: Apr 2013
Posts: 4
Likes: 0
I bought my truck used and the driver door had been replaced due to an accident. Can I get my axle ratio from the VIN or from Ford? I guess if I have to I could jack 'er up and rotate the rear tire and figure it out.....
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
Look in the TECH FOLDER. The information for decoding your VIN, door sticker and axle tag are all there, along with some other good stuff.
Lead Driver
Joined: May 2003
Posts: 9,303
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From: Lyndonville, Vermont
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New User
Joined: Apr 2013
Posts: 4
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I was lucky enough to find a tag on the axle. It has both a 73 on it a 10.5 for the axle diameter and a S 409 or something like that. So I do have some info to go on. It is a standard cab 4x4 with a 137wb
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Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,078
From: St Louis
The YEAR and MODEL are what is needed to do an axle code look up.
Logistics Pro
Joined: Oct 2006
Posts: 4,025
Likes: 890
From: East Central Ia
Thats pretty much a standard speed. Or it was back when I drove trucks. Brother in laws company he drivers for has all their trucks set for 62. Most of the big tires only rated for 75. No sense trying to drive on the edge with today's traffic. JMO
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