The problem i am having is really best compared to the sound of a woodpecker, When my truck "1998 gmc jimmy 4x4 4door" starts for the first few seconds it sounds fine, But then starts sounding like a woodpecker is in my bellhousing so i tell myself the torque converter bolts are probly loose i just put the motor in a few months ago. I put my truck on my lift at work, Pull the starter and the cover in front of the starter spin the flywheel sure enough 2 of the 3 bolts need a turn tight, Then i put the starter back in fire it up the noise is still there. I inspected the flywheel the best i could thru the hole in the bellhousing i can not see a crack, But could it still be cracked any thoughts thanks ahead of time

 

Definitely sounds like it is.

 

Thanks for the quick response, Im gonna go start on it now the noise is driving me insane!