Just try and find some time to get back under the car and retorque everything that was touched that you could see..
If its still happening then examine further.. its the only way to get rid of that.
I had used to have a clunk and couldnt understand where it was coming from.. i always blamed the stiff motor mounts for the noise..
"With light weight aluminum internal body for maximum performance" - that says it all. The structure isn't CF so it's very cheap to make. Its like all those CF wrapped parts I was doing, super easy, super small ammount of materials.
drove the teg to the basketball courts and back today.... i TOTALLY dig the feel of the new shift know... since it's not metal like my last one was, it wasn't hot to touch after having the car sit out in the sun all day.....
still got that annoying "clunk" going from dead stop to moving....... i don't know if SweetTeg has any time tomorrow or Thurs night to help me go through checking that everything is tight, otherwise i make the trip with this clunk in tact......
also, my front suspension has seemingly digressed to it's "too low" state, i'm rubbing the inner fender on sharp slow turns again... :: sigh ::
I have a clunk as well in my car....it sounds very similar to what you're describing. I noticed it the first time I test drove it...I am betting it's a transmission mount. I haven't gotten down/under there to look, though. It seems to only do it in first gear.
the bolt he's refering to should be on the back of the "T" bracket in the rear. it should be visible when looking from the passenger side when looking under the IM, you might need to remove the intake piping to better/easier view this. but a bolt/torque inspection would be recommended.