Ford escape wierd noise

My wife's Escape is making a really weird noise, and were not sure what it is, I took it to a mechanic, and he said it was a Left wheel bearing, so I changed that and its still making a noise, here's a link I uploaded to YouTube, Definitely up for suggestions, Thanks! http://www.youtube.com/watch?v=B0GkYLUV5dY&feature=youtu.be :banghead:

I'd shop around for a transmission shop. It may just be the axle shaft as it enters the trans, but it could be anything. I've never heard that noise before. Try and find a shop with a life time guarantee/warrantee. When my '02 Escape 4x4 tranny died, I paid an extra $200 for a lifetime all inclusive warrantee that covered everything in the tranny for as long as I owned it. Less than a year after the rebuild, the case that the clutch packs sit in cracked open. They covered everything including the tow into the shop.

Ok, so best guess Tranny? ill look into that thanks, I was wondering if it was the Splines not put in all the way as well, however, this is my first car I've personally worked on, so its all new to me =P. Though im definitely learning a lot ha-ha