Hearing a high pitched timing/whistling noise coming from trailer, specifically around the air tank area, anyone know what might cause this? I found a air bag with a very minuscule leak that I’m getting changed out tomorrow, hopefully that gets rid of it, but every time I release the trailer brakes, the noise comes back as it’s filling the tank. The hoses have also been changed out recently.
Trailer making high pitched noise
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by ach1998, Apr 8, 2021.
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