Transmission noise in actual trucks

What should be the more “silent” truck regardin gearbox or rear end noise?

It is expected to heard a transmission noise in a current truck on the market?

The question is because often you read about low noise engines - but nothing about noise in the transmission.

Thank you

Edzio

Wot’s an “Actual truck” as opposed to a “truck”?

Sapper

sapper:
Wot’s an “Actual truck” as opposed to a “truck”?

Sapper

I mean trucks like EURO IV and V - where the engine noise use to be lower when compared with an EURO III.
So you can heard another noises (transmission included)