whats this noise?

[Day-mow]

i have a pretty stray noise coming fromsomehwere under my car. it sounds like i have a dog box almost. but there is also like a grinding whooping noise.

i've been suggested to do uni joints so i go 2 i figured for $16 each may as well do them both while the tail shaft is out. i recently replaced the diff and trans oil so lubercation effectivnes and levels are good.

here is the 1st video. im doing 90 Km/h in 4th gear. you can hear the difference in when its accellerating or backed off.
http://www.youtube.com/user/Daymow?f.../7/jAMAZ8hxz-c

this video is 60 Km/h in 4th and then dropping down to a coast. you can hear me call out 40 to get an idea off what speed it would be at.
http://www.youtube.com/user/Daymow?f.../6/QPeimqoxyWE

if you have any suggestions please let me know. will do uni joints 2morro regardless. figure may as well do it.

thanks to Whoosha for the crash course

[Day-mow]

baiclly the whooping noise is my new brake pads are bigger then my old ones so theyre wearing down te rough surface.