What might a Busted Torque Converter sound like?

[Blown&Injected]

I thought it was just my down pipe rattlin' against something until the frequnecy of the rattle developed a pattern that exactly matched the engine RPM's.

Sounded like (although not found in our cars) a mechanical (not electric) fan blade smacking on the fan shroud - perhaps a bit metallic knock like.

I was able to get under the car -engine on- and it almost sounded like there was a knock in the bottom end on the engine.

On the highway during lock-up the sound is not noticable. If I tap the brakes the sound returns breifly and goes away again with lock-up.

From a stand still, the knock is BAD and then fades as the RPM's come up.

Any way to tell for sure?

TIA,
Steve

 

[JASON]

MINE SOUNDED LIKE SOMEONE WITH A BOX OF GRAVEL SHAKING IT UNDER MY CAR....

 

[MeanBuicks]

Originally posted by Blown&Injected
Any way to tell for sure?

Sounds like you may have killed your converter alright. What I would do, to further verify your suspicions, is remove the three converter-to-flexplate bolts. Push the converter back into the trans., away from the flexplate, until it bottoms out.

Crank up the engine and see if the noise is gone.

 

[guyn]

Sounds like the problem I've been having, when cold runs fine when hot noticable shudder when decelerating , then will bog upon acceration, last week took the car for a final run before the white stuff flies on returning home notice a stumble on acceleration .I stopped at the local store could smell clutch burning and lost all forward gears . I've been having a over heating problem running about 212 after about 1hr driving .
A friend of mine was a rad man 15yrs was by yesterday and suggested it was the torque converter and thought this was probably the source of the overheating as well . I'm going to pull the tranny and torque converter over the winter , hope I haven't fried the tranny it only has a few miles on it since rebuild.
Any suggestions as to upgrades for tranny and is there a special fluid I should run , the car is an '84 GN completely stock with 78000 KMs with 5000kms since rebuild , tranny suppose to have shift kit installed with stock converter .
Thanks in advance Guy Newton

 

[Blown&Injected]

Thanks for the replies and ideas
Might be a good time to try to get in on that new converter I've been reading about.