what's possibly shaking in my 05 Accord V6?

For about three months now, my 05 Accord V6 makes clunk or "water" like of
noise when the gear first moved from P to D and similar noise while the car
is making quick turn.
But problem is that noise does not always appear.

I tried putting away everything from around the center console (noise sounds
coming from there), obviously it was not because of any stuff I left in the
car shaking...

Any clue?

 

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Is the coolant reservoir well above MINimum? I know a Gen 1 Odyssey will
make funny noises when air in the coolant gurgles through the heater,
especially when cornering.

'Curly'

 

An illegal rap singer from south of border stashed behind the glove
box?

 

My 2006 V6 is doing exactly the same thing - a short "THUNK" that makes
the floorboard quake. I back out of my car port, turing the wheel to
the right, put the car in D and start forward - THUNK!

 

Curly,

Thank you for coming to rescue again--I am the guy who got a brand new
Accord stuck in garage could not start!

How do I check the coolant level? Is it the coolant for AC or the cooling
device for engine?