Lately when going on the freeway, either in fourth or fifth, around 3500 rpms, I get this sound of a turbo?
Now I know I don't have a turbo, wish I did. But none the less it is only when under power. I'll let off the gas and the noise will stop but when I push the gas to maintain or accelerate. I get a turbo like whine.
The noise doesn't happen when in 1-3 gears only when going high rpms, 50 mph above.
Diff? Drive-line? Belts?