Old thread, but just swapped an LSD from an 03 Explorer 4x4 I found in the junk yard into my 2008 Eddie Bauer. Fit like a glove. Even left the speed sensor on. The diff was very well maintained. I pulled the whole axel at the yard, gutted it for the carrier and pinion and threw it in my original case. Now I have the HD pinion bearing with 3.73 LSD and a 4 bolt housing. Putting it on the road tomorrow to see how much smoke I can make.