annoying creaking

[PeteyAce]

whenever i been braking lately ive been getting a creaky sound coming from just about were my tranny sits, no matter how likely i brake i hear, and it got a bit louder...........im thinking like a bad u joint ever hear of such a noise

 

[PeteyAce]

ok iam positive the sound is coming from my tranny, also like i said before is only makes ihe noise when i am slowing from 15-0, it got even louder today, i tried to shove my tranny around to see if it was a bad u joint but i just got crud on my hands, i was thinking maybe its my clutch but i dont have to downshift from 2nd to first to hear the noise