hello everyone. i have this problem, my car makes this noise as if there were baseball cards in the spokes. only when i am accelerating hard though. it is a 96 blazer LT. 4dr 4wd. 150K miles. i think this might be because of the cold but im not sure. its too cold out to take anything apart to look. anyone else with the same problem if you ever found anything out it would be greatly appreciated if you can help me resolve this. thank you.

 

I would check the exhaust hangers to make sure that the drive shaft is not hitting the exhaust.

 

i checked recently and its not. i did notice that when i kick the exhaust tip from the side it makes the noise too. i think its right above the muffler which i noticed has a small leak. looks like i have to get rid of the muffler and just go to straight pipes!!!