Shutter in gear

I’ve had this shutter for over a year now and been to a couple shops and no one has been able to give me a clear answer, it happens only when I’m in “D” and idling I can stop the shuttering by shifting into neutral I’ve changed the MAF, cleaned the original MAF, used another MAF from a Tacoma that was running properly and still wasn’t the issue, I then tried changing the pulley on my ac compressor cause I noticed the shutter was a little quieter when my ac was on I’ve cleaned the throttle body, sparks and coils are all good so I’m lost and the worst part is that I’m not getting engine codes

 

Also about a week ago I started getting kind of a belt squeal but very quiet and only from like 0-10mph and when I’m in D no other gear

 

The yota in question

 

Does driving in 4th make the shutter go away? If so it could be torque converter related

id try adding some of this and see if it helps

$15 Lubegard 63010 Platinum Automatic Transmission Fluid Protectant, 10 oz.

https://www.amazon.com/gp/aw/d/B002MB57UI?ref=ppx_pop_mob_b_asin_title

 

I haven’t tried putting it in 4th I always just put it in neutral and it goes away

 

Sounds like a torque converter and a serpentine belt.

 

How do I test the torque converter, I put it in 4th and the shutter is worse in 4th than drive it only goes away in neutral

 

@Superdave1.0
@Bishop84