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Old 04-10-2013, 06:18 PM
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Jammed torque converter

Ok, long story short: my Nova has a 383 abc and a th350. There was a knocking noise in the rear bottom end but I have great oil pressure and the motor runs strong. I wanted to rule out an issue with the torque converter/flex plate. Following the suggestion of someone on another forum, I disconnected the torque converter from the flex plate and pulled it back so the motor could run on its own and see if the knocking noise went away or not. Well, when the motor fired up, it appears that the torque converter vibrated forward and is now jammed up against the flex plate. It rotates with the motor but I can't get it pulled back and I can't turn it by itself to realign bolt holes with the flex plate. The impatient part of me wants to drop the trans in gear and see if the torque converter dislodges but I'm pretty sure that would be a bad idea. Has anyone got any ideas? I know I could 'just' pull the transmission but I'm trying to avoid that if possible. The car was drive able before my little diagnostic session and now it's not

Any suggestions would be much appreciated!

Chris

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Old 04-10-2013, 06:49 PM
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I would think that the torque convertor might be damaged by it being jammed up and wouldn't be able to be pushed back. If you pull the tranny back, you may have to replace the torque convertor. You may have to replace flex plate also. Don't forget to always to replace the front seal. There could be other damage, such as stator shaft.
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Old 04-10-2013, 06:54 PM
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Sorry, I forgot. DON'T START IS UP. You don't need more problems. Pull the tranny, its safer.
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Old 04-10-2013, 06:54 PM
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Thanks for the reply! So are you saying that you believe there was something wrong with the torque converter which caused it to get jammed, or the fact that it slid up and jammed caused the damage? I didn't hear or feel anything out of the ordinary when I started the car.

Thanks again!
Chris
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Old 04-10-2013, 08:27 PM
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You may of not heard anything.
but if that came forward against the flex plate while motor was running, is possible it was not lined up right and bound up the torque convertor on the shaft or tub and its not going to go back. What ever is damaged is holding it back. I would think that your going to have to pull it back far enough to full the convertor clear out. The damage may be in the convertor and can't be seen unless you know what your looking for. Its going to be better to pull it and make sure at this point before you just take a chance and do more damage. Its not fun. I've got to pull mine back to put in a larger stall convertor, and i'm sure i'm a few years older than you. 66
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Old 04-10-2013, 08:30 PM
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Good luck on your 74. Mines a 77 concours hatchback
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