Does my 1994 Ford F150 4x4 have limited slip differential?

So I was wondering if my 1994 Ford F150 has limited slip. I looked at the numbers on the differential cover and they are; "3L55 88 3L08". Any help?

The "L" indicates limited slip

But unless some really effed up at the factory there's no way one diff would have 3.08 gears and the other was had 3.55 gears. If that's the case, 4WD would be about useless to use.

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