drive train noise on 2006 Pontiac Solstice

it seems like there is some play in the drive train. it clunks when you shift gears. any ideas? the car has 21k miles.

Asked by for the 2006 Pontiac Solstice
Pontiac put a support bracket on the tranny on 2007 and newer cars, I have same clunking noise I was told it would be ok from Pontiac dealer. I don't now if one could be added.
2 more answers
I noticed the same thing in my 2006.. weird..clunking.. I heard from a GM tech that this is normal because the parts are so close to each other.
I just recently purchased a 2007 Solstice GXP w/3,600 miles on it. I too noticed the drivetrain noise, & whilst it was up on a lift, I noticed that GM has a large rubber disc which joins the driveshaft, & the pinion of the differential. It appears that both are bolted to this rubber disc, but each seems bolted to it separately. ...meaning, instead of 4 bolts connecting the driveshaft to the pinion directly, there are 8 bolts, & a big rubber disc with 8 bolt holes. The driveshaft uses 4 bolts & 4 holes, and the pinion uses the other 4 bolts & 4 holes. At least that's what it looked like. I will do further investigation & edit appropriately if I find anything to the contrary. I have only had the car for 2 weeks, so I apologize for any inaccuracy. Hope this helps someone! :)