How to know what size differential

[craig sargood]

Hello everyone, getting ready to order my lockers and wanted to make sure I’m getting the right stuff. Am I correct to say my 2000 expedition xlt 5.4l 4wd has a 8.8 diff in the front and a 9.75 in the rear???? Here are a few pictures of my differentials. Any help would be great, thanks everybody. I’m guessing by the 8.8 on the front diff that I’m correct and I believe I see a 975 on the rear tag.

 

[ExplorerTom]

Yes- 9.75. You can sorta see it in the bottom pic. I can’t make out what gear ratio.

And all front diffs are 8.8.

 

[craig sargood]

Awesome, thanks again Tom. Is the number before the 975 the gear ratio??

 

[RMARTIN]

I have a 2000 E.B. 5.4L awd I'm assuming the L55 in front of the 9.75 is a 3.55 gear ratio just can't see the 3 in front of the L.

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[RMARTIN]

DELETE:

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[JoJoDaClown]

Just FYI, it's a bit easier to figure out by looking at the sticker on the pillar of the driver's door. There's an Axle code there, and you then look that up.

 

[markfrei]

3L55 is a Ford 3.55 traction lock. A "L" denotes a traction lock diff. A "." Is an open diff.

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[LAexpy]

Yup, my diff is 3L73 = Limited Slip 3.73 gears