Axle code look up

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Apr 10, 2006 | 09:41 AM

Mikes67F250

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From: Wayland, Iowa

Axle code look up

I have a 99 expedition xlt full time 4x4. I looked at the 2 tags on the rear center section and found no gear ratio information(3.73 or whatever) I do have the code from the door tag but can not find what it translates to. It is I9 or 19. Can anyone help with this I sure would appreciate it. I am wanting to get the diablosport for my 4.6 but am looking into gears first. Thanks

Apr 10, 2006 | 09:49 AM

TDN

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From: Maryland

The "19" axle code should be a 3.55 non-limited slip. PaulC posted the axle codes for the 99 expys a while back:

https://www.ford-trucks.com/forums/s...d.php?t=152046

-Tom

Apr 10, 2006 | 09:58 AM

Mikes67F250

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From: Wayland, Iowa

Thanks for the response. I am going to be towing a bit and wanted to get a little more horse power with the diablosport but wanted to know the axel ratio first. Looks like I"m right on the line. 3.73 would have been better. But oh well. It's going to be a weekend tower and a big summer road trip towing about 3000 pounds with boat and gear and such. Should do ok if I get another 20 horse or so out of it. My 67 f20 tows it better right now. Has a 300 straight 6 with 4brl holley,headers and alum intake. Fuel injected motor converted for carb so it is a high compression motor.