You might look at the flex plate bolts
These bolt the flex plate to the front of the torque converter. You can see these thru the access plate at the bottom of the rear plate on the motor.
2 bolts to remove the access plate, then rotate the motor at the front harmonic balancer bolt to expose these bolts with 13mm hex heads, 3 pairs in a trigonal configuration.
Make sure they are all there. That could cause some noises if some are missing.
Very easy to check.
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