"there is an odd noise I hear underneath the car during extreme braking. During extreme braking underneath around the pedal and the center console, there is a grinding noise. Sounding like a vibration of sorts."
While it very well may not be, is it possible that it is the brake antiskid system doing it's thing, releasing and reengaging the brakes? You do say this occurs under extreme braking, which is pretty much when this system is supposed to work. You will get noise and vibration when this system turns on.
There is a section in the Owner's Manual which describes this system, how it works and when it will be active.
Do you get any noise or vibration under less extreme circumstances, as in ordinary driving?
1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27
previously owned since 1964:
62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6
Last edited by Del; 03-24-2015 at 12:00 PM.