2006 Mustang GT possible transmission issue

A little over 96,000 mi and pretty much no major repairs.

Recently noticed under light acceleration, pushing in the clutch there is what would sound like taking a brick and scrape across the cement for a second.

There is throttle hesitation and a roaring sound.

It's currently at the dealership and they are recommending dropping the transmission to investigate.

Thoughts or someone with a similar experience?

Thanks in advance