If your chain tensioner pushed in under a load and stuck it will cause you to get a lot of noise. Change your oil, and look for grit in it, (guide material on tensioner).
I also have had to replace two flexplates(auto flywheel)
in mine, take off the inspection cove to the bell housing and wipe your finger inside the bottom of the bellhousing.
also look for metal shavings, that will be the flexplate cracking and rubbing agaist itself causing the shavings.
Usually you will hear a loud scraping noise when starting if it is the flexplate.
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