No debris, filters clean currently, but it is a new ebuild. Ill have to see how she does when i put my camper on it and really load it up. Fluid was a little on the high side and tv cable was a bit tight. The whirring almost sounds like my turbo with a boost leak, its not that though.I would double check fluid level .
Make sure lines and coolers good.
Perform complete pressure test help to narrow down issue.
What has fluid and filter /pan debris looked like might give a clue on an internal issue.