Limited Slip Question

[Johnny O]

If you have a 4x4 ST with the 4.10 L/S option, then it is L/S both front and rear.

No it isn't. Only the rear. Ford never offered a front limited-slip (or locker) in any Explorer or Sport Trac.

*Back in the 80's for a few years they offered a front limited-slip in Rangers and Bronco II's but that was for the Dana 28 front, and factory units are scarce as hen's teeth.