<VV> Engine Knock only at low RPMS

[WadeHalsey]

Remember in Brian's original description of the problem that he had 
replaced the torque converter.
He also told me that the noise seemed to be coming from the bell housing 
area.
I suggested to him that the flex-plate to TC bolts might not be tight. 
Haven't heard back
from him on that idea.  Mike Kost's suggestion to check the bolts to the 
crankshaft applies
to flex-plates as well as flywheels though.

Wade Halsey