Diagnosing a vibration on accel

2012 trd sport prerunner

Started to notice a vibration on acceleration at any speed(seems to be just linked to trans speed) and goes away revving in neutral. Checked drive-shaft play also but it seems solid. It's a very quick vibration also, almost like a buzzing as it's accelerating.

I'm posting here because it got a bit weird, where I engine flushed and changed oil(I do 3000mile intervals just for peace of mind) and it disappeared for maybe 3 or 4 days(drive 60 miles a day or so)but now it's back. Possibly engine or trans mounts? I'm essentially just seeing if anybody has suggestions on what I should diagnose next. Thanks!