So, this can happen when the transmission torque converter is not seated in the transmission completely. If so the front pump of the transmission got damaged when the engine was bolted to the transmission, here is a video of what I am talking about.
It is on a Ford, but it applies to all automatic transmissions.
https://youtu.be/ZC7xHVMKLRw?si=UovtmykfXTjpNT1I
Can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on. You can upload it here with your response.
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Friday, October 6th, 2023 AT 10:26 AM