Accidents happen.... but it sure doesn't inspire confidence when a dealer screwup happens to your own truck....

You've driven the truck long enough to know what is normal sounds for the Allison. Yes, these transmissions will whine, but it's mostly noticeable when cold - and mostly during the cold winter months. I can't hear mine when it's warmer outside or anytime during the summer.

If I thought the whine was abnormal, I'd pull the pan myself and have a look. If you take it to another shop, take along a camera to document what you "might" find.

Jim