My Taco is growling at me

2020 DCSB OR v6 auto with no mods. When slowing down, highway speeds and lower, my truck makes a growling like noise right below, or around, the pedals. The sound is definitely audible, but not overly loud, and almost always occurs during 20mph and lower speeds in 2wd and 4hi. I’m assuming it could be a vibration issue, but I honestly have no clue. It started doing this about 3 weeks ago. This noise only happens when decelerating and down shifting for a few seconds, and never when accelerating or traveling at a constant speed, 15mph and up. Also, my truck started making a light clunking noise from the front driver’s side when slowly going over bumps when turning left yesterday. Any ideas?

 

One idea - bring it for check up and warranty repair (adjustments).

 

If you can reliably recreate it, ask to take a tech/mechanic for a ride so they can experience it unless you are sure they will notice it when test driving.

 

My son just had a similar problem, 2017 4wd. He has super hearing and heard a growing, took it to dealer, they said it was a wheel bearing, they replaced the hub. That was not it, took it in again and they found a needle bearing on the transfer case to be going bad. This looks like a possible problem with these trucks, they replaced the transfer case an no more noise.

 

Oh well.

 

Did you check the back seat?

 

Not going down hill while this is happening? Truck has auto break for down hill. Hope you find answer. Sorry for shit grammar lostt my right index yesterday.