3.0d4d Prado 120 1300-1500Rpm Vibration and humming problem

[rafetarc]

Hello. I drive a 2008 Prado 3.0 D-4D with 234,000 km. The issue I'm experiencing is a vibration and a droning noise in the 1200–1500 RPM range; the noise stops when I press the accelerator a bit harder. Although my vehicle has an automatic transmission, the problem feels exactly like what happens with a manual transmission when the RPMs drop too low—causing noise and vibration. My injector readings are good, and both the transmission fluid and engine mounts have been replaced. It sounds just like the noise and drone you get when you need to downshift, and it occurs only within that 1300–1500 RPM range.all data is in the photo.