02 mustang gt auto knock only at idle in gear.

Hello, I have an 02 mustang gt auto with 195k miles, and the problem I’m having is a knock coming from the very bottom of the motor (possibly transmission) that only happens at idle in gear (at 600 rpms) and cannot be heard AT ALL from the top of the engine in the engine bay. The moment I even press the gas the slightest bit, it’s completely gone. And it never knocks AT ALL at any other rpm. Any help is appreciated because I have absolutely no clue what it is. Thank you.

wmburns said:

If this were my car I would use a mechanics stethoscope to probe around the torque converter to flex Plate bolts. Or perform a visual inspection to see if the torque converter bolts have backed out or the flex plate is cracked.

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Okay thank you for the advice, i will take a look tomorrow. Let’s say that doesn’t happen to Be the culprit and the noise is actually engine related, what do you think it would be?