99 4.6W - Need Parts Help.

[98RedExp]

Just got my Third Expedition.

99 Ford Expedition
4.6 Windsor
125k.
AWD, 4LO, 4HI

It needs the front differential. It is blown and making a ton of noise.

What part number do I need to be looking for (prob drop ship a used one off eBay) or particular verbiage should I be looking for? Its got all stock gears in it, so that would be the 3.73 right? I see listings for diffs with and without vacuum disconnect.

This should work yes for my application, right? http://www.ebay.com/itm/141562825472

 

[2004XLT]

Probably 3.73, but there should be a tag on the diff with the gear ratio stamped on it.