hey everyone i had sent out my transmission to shepherd to get a stage 2 rebuilt and after 2k miles it started making this weird noise. We pulled the tranny and put brand new bearings thinking that was the issue. Also, installed a new excedy twin disc clutch. This noise still continues and we are not really sure where is coming from. Any help or sugestion would be greatly appreciated. Thanks in advance.

Edit: forgot to mention this noise is only after 3k rpms. At idle you cannot hear the noise but the car vibrates.
https://www.youtube.com/watch?v=Ul5dzUEQ9E0&feature=youtube_gdata_player