i've been having a problem with my convertor shuddering when locked, and also a metallic rattle at idle. well, they gave me a new convertor. i only had to pay for shipping. i put it in last night. noise gone! no shudder so far. ok. so i come home from work tonight and pull the car out of the garage to give it a once over and dust it off before i go to the track tomorrow. so the car's idling and i crack the throttle a few times. the last time i let go i hear this god awful rattling/knocking sound that sounded like something in the motor let loose! i thought maybe possibly the convertor bolts, but they would have to be almost falling out to make this much noise. i shut it off and reach under and check. couldn't move it by hand. bolts tight. uh oh! so i take it up to work and double check it on the lift. the first two bolts are tight. i get to the third one and it's tight. so when i take my wrench off i hear CLANK. i put the wrench back on and here, i can move the convertor back and forth on the flexplate. i find out that the bolts are actually bottoming in the covertor pads, and not tightening enough on the flywheel!! i take the bolts out and add a lockwasher and some blue loctite, and viola! problem solved. sure scared the living crap out of me when i first heard that noise though.
