2017 SR5 - noise when accelerating as car shifts gears.

Hi all -

I was driving at about 30-45+ today and whenever I hit the gas there was a rattling noise before the (auto transmission) shifted gears. I've read that the 2017 model has some issues with transmission slippage - is that a possible explanation? I've only had the truck a few weeks but haven't noticed this before.

I tried - and failed to capture some audio. Best described as a rattling almost like there was something small vibrating in the car.

Of note - this is a Certified Pre Owned well within the warranty so debating bringing it back to the dealer (or maybe getting diagnosed elsewhere).

 

Exhaust shields?

 

Tap the catalytic converters to see if one is rattling