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Unread 07-16-2014, 06:36 PM   #1
DeanLM90
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1997 ZJ 
 
Join Date: Jul 2014
Location: Littleton, Colorado
Posts: 11
Torque Converter Grinding Noise

Third time was not the charm while trying to stop my rear main leak.

Put everything back together started her up (in neutral) only to hear the most gut wrenching LOUD grinding noise. I can only describe it as if one were to take a spinning flywheel and slowly move it into a solid piece of metal as if using the flywheel as a saw blade. I moved it from neutral into park before shutting it off.

Anyways. I am taking it apart again to investigate. Here is what the TC teeth look like. Any guesses as to what parts are interfering would be appreciated.

Possibly related:
Usually only starts in neutral
Had to jack the tranny up past normal mount angle to get oil pan off

**Problem was a bent cover plate for the bell housing. Thank you NEWFIEZJ for convincing me to look past the jacked up torque converter teeth (unrelated damage) to see that the actual points of interference were at the flex plate bolt heads. Damage was surprisingly minimal for how gut wrenching the noise was.




Last edited by DeanLM90; 08-01-2014 at 10:41 AM..
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Unread 07-16-2014, 07:07 PM   #2
ozzy_2_me
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1994 ZJ 
 
Join Date: Jan 2011
Location: Lansing, Michigan
Posts: 353
looks like something with the starter is miss aligned or is not engaging or disengaging properly. only thing I can think of at the moment.
hope this helps.

- Kevin
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Unread 07-16-2014, 11:20 PM   #3
DeanLM90
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1997 ZJ 
 
Join Date: Jul 2014
Location: Littleton, Colorado
Posts: 11
I want to say that it's the starter also but the thing looks completely unscathed. If it had been the culprit I would expect to see trauma. The starter tested fine on the bench also. I then thought maybe the CPS but it looks untouched and fully operational. The rubber grommet that is supposed to be around the CPS is missing however but I suspect a lazy transmission shop tech on that one considering it is nowhere to be found. I pulled all the plugs and turned it by hand for a while but didn't hear a single thing.

Could I have done something wrong putting the bearing cap back on or even the oil pump?

I really am not looking forward to replacing the starter and putting everything back together again only to hear the same excruciating noise. At least if it happens again I'll have it recorded for reference.


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Unread 07-17-2014, 05:41 AM   #4
newfieZJ
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1995 ZJ 
 
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Location: , Alberta
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Look at the flywheel cover for scratches . I've bent them and had the same rubbing .
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Unread 07-26-2014, 07:17 PM   #5
bigbill888
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Quote:
Originally Posted by newfieZJ View Post
Look at the flywheel cover for scratches . I've bent them and had the same rubbing .
what he said
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Unread 08-01-2014, 10:44 AM   #6
DeanLM90
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1997 ZJ 
 
Join Date: Jul 2014
Location: Littleton, Colorado
Posts: 11
Quote:
Originally Posted by newfieZJ View Post
Look at the flywheel cover for scratches . I've bent them and had the same rubbing .
Upon a very close inspection I did in fact notice some small circular scratches where the flex plate bolt heads were interfering. Apparently the converter teeth had been damaged previously in an unrelated incident. Thank you NEWFIEZJ for your suggestion.
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