I’m wondering what the noise could be. I attached a video of it. Happens once the car is warmed up.
2006 Acura TL auto.

 

 

tensioner pulley or belt

 

you think that is the noise? It does it on any gear once it’s warmed up

 

Since drive belt is a suspect, just take it off and check if noise goes away. While at it, you can also spin pulleys by hand and check if they are making noise or spinning for a very long time.

 

just take off the belt and check?

 

yes, it's an accessory belt...or serpentine belt.

the tensioner will need to be pushed against the firewall....
so, take a breaker bar and the correct sized socket, attach socket to tensioner, push breaker bar towards firewall to loosen the belt.