so i started taking the tcase out, pulled the rear drive shaft off and spun it, makes very much the same sound that i was hearing before when i put it in drive! pulled the drain bung to drain it before separatign the tcase from the trans adapter... low and behold there was so much shrapnel in the case that it blocked the drain hole! stuck a screw driver in it to work it around and i'm sure half the guts of the tcase fell out. I think I'm on the right track
Thanks for the suggestions guys. I'll let you know if the tcase fixes it totally.