Axle Code from Axle, not Door Sticker Help

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Mar 14, 2008 | 01:17 PM

Stone Mathews

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From: Allegheny Mountains, VA

Axle Code from Axle, not Door Sticker Help

Hey all,

I either do not have, or have lost (I just bought this truck used) a door sticker. It's a 1999 F-250 SD SC

The little metal tag on the rear axle reads this:

4101058C20

At lest that is the best I can tell.

Can someone decifer this for me?

Can I assume the 410 means 4.10?

Is this limited slip or not?

THANKS IN ADVANCED!!!

Mar 14, 2008 | 01:32 PM

redford

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From: Stephensville WI

I think this is what you should be looking at:

C2 — 4.10 limited slip, F-250/Excursion

I could be wrong on that, so please wait for other opinions.

Mar 14, 2008 | 01:37 PM

NumberDummy

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From: Simi Valley, CA

Quote:

Originally Posted by redford

I think this is what you should be looking at:

C2 — 4.10 limited slip, F-250/Excursion

I could be wrong on that, so please wait for other opinions.

Wouldn't the C2 be the AXLE code listed on the Certification Label?

I'm no braintrust on these newer trucks, but that letter/number combo was what Ford used for many years as an axle code on Certification Labels and Warranty Plates.
ARTICLES/SPECS top of this page has an axle decoder.

What Ford rear axle tags looked like on rear ends from circa 1968 and later was this if LS was present: 4L10. Without LS: 4.10

Mar 14, 2008 | 02:18 PM

Stone Mathews

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Senior User

Joined: Oct 2006

Posts: 215

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From: Allegheny Mountains, VA

I couldn't remember what the little door sticker was called, it's the Certification Label that I don't have. All I have are the numbers off the metal tag that is attached to one of the bolts on the differential cover.

I've read the ARTICLES/SPECS page, but it only decodes axle codes that came off the Cert Label. Now that redford points it out, I do see a C2 in my number, but that is followed by a 0.

Anyway, thanks a ton for the replies guys. Anyone else wanna weigh in and help me out?

THANKS!!!!!

Mar 14, 2008 | 03:25 PM

redford

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Joined: Sep 2000

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From: Stephensville WI

You can always do this if all else fails:

Jack up the back axle, getting both rear wheels off of the ground. Put truck in neutral (remember to block the front wheels and please use jack stands).

First rotate either rear wheel clockwise. Watch what the opposite rear wheel does. If it turns the same direction, you have limited slip. If it turns the opposite direction, you have an open rear diiferential OR a worn out limited slip rear end.

OK, now put a chalk line on the driveshaft, visible from the rear tire where you're at. Rotate the rear tire slowly, counting how many times the driveshaft rotates.

3 3/4 turns means you have a 3.73 differential. 4 turns and a bit more means you have 4.10s. 4 1/4 turns means you have a 4.30.....you get the idea.