Whistle from turbo.. 2007 mazda bt50 2.5 diesel turbo. . While accelerating I get this whistle noise in the cab. High pitched sort of. it sounds like its around the passenger side footwell.. if driving normal is makes the noise at around 1500rpm. Its really starting to bug me. What ive checked. All hoses and clamps associated with the turbo, intake and intercooler. Pressure tested between turbo outlet and intake manifold. No leaks. Maintained 25 psi.. ive disabled the egr by blocking the vacuum hose on the actuator. . No obvious leaks. . Is this sound just normal turbo noise with this model? ? I've owed 6 different types of turbo diesels over the years and none of them sounded like this. ..

SOURCE: 2004 Dodge 2500 diesel, manual trans. noise/whistle

If your certain the noise is from the transmission, you need to take this vehicle to a shop you trust. It sounds as though the fluid pump in the transmission is either starving for fluid, due to a blocked strainer, or the pump is suffering a bearing failure. If you continue to run this vehicle, you stand the chance of stranding yourself, or burning the clutches from a lack of fluid. Good Luck.

SOURCE: Hi, I have a 2001 ford f250 diesel. Recently I`ve

I had one of our work trucks do something similar. It turned out to be the tube that goes to the charged air cooler was split. This is a large plastic tube that carries the pressurized air from the turbo to the chraged air cooler (it's in front of the radiator) then back to the engine.
Start the engine and have some one hold it at a fast idle and feel around for an air leak on those tubes. Be careful not get your hands in the belt or fan.

SOURCE: 2001 Ford Escape runs rough on acceleration and at

escape 2001 runs rough, but after a certain speed ( 50 mph ) runs smooth.

SOURCE: I have a 2000 Mazda protege es, and when I turn

no hole in line somewhere