2022 SR5: Auto Transmission faint pulsation as coming to stop + faint 'diesel-like' rattle on start

I'm experiencing two things:

• When I'm coming to a stop (around and under 5 mph), i feel a hi frequency 'pulsation' coming from the engine. Like a downshift. No not brakes. Is this normal?
• Rarely when I start rolling, I hear a very 'chain-like rattle'. Kind of sounds like a diesel truck taking off. Lasts a second or two. Hard to reproduce.

Any thoughts one each of these will be greatly appreciated.

 

Probably normal as far as the sound these engines make at idle. Some of these engines a louder than others. Why do all the real odd ball complaints come on a Friday?

 

The downshift is normal, as is the diesel like sound, which are the direct injector cleaners.