Zen, while you have the drive train out, check your trailing arms out. I remember sometime ago someone on here (maybe you?) being instructed to place both the spacer's at the pivot bolt on the OUTSIDE of the arm. After bolting everything up like this I flipped the car on its side (rotisserie's are SO nice
) and noticed the spring plates being drawn in to connect to the arms. This made the two bolt heads for camber and height adjustments on the 944 spring plates rub the shock towers. I then swapped the spacer's to the INSIDE and got a better alignment for bolting to the arms, and gave some more clearence for the springplate bolts. This is just something to check for the noise you're hearing maybe. Although the trans cradle bolt loose could be it... just something else to check while your under there.
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1970 T1 W/MassIVe 2913cc RAT/?EFI? w/direct fire (very soon) and 915 trans
1962 SC 1776cc SP 944NA brakes, 993 wheels
VKG