You can also remove the speedo pinion gear/adaptor and make a metal plate to cover the hole. They actualy make those plates. Then drive the car and see if the noise is still there. At the very least it would eliminate that possibility of the speedo cable gear assembly making the noise.
Tom
"Everyone should believe in something; I believe I'll go fishing."
-Henry David Thoreau
Men and fish are alike. They both get into trouble when they open their mouths
