Engine/Transmission (1998.5 - 2002) power braking audible alarm

[856.9]

Tonight I was out on a remote road and was trying a little power braking. I can barely do this from a stand still so I would get a rolling start in 1st gear and rev to about 2000 rpms then step on the brake and floor the accelerator. The stupid abs would kick in and barely hold the truck letting it move forward slowly. After a few tries I noticed what sounded like a buzzer or a high piched alarm going off. When I stopped this went away. The noise repeated when I power braked again.



Any ideas? The noise sounded like it was coming from under the dash.



I have taken the silencer ring out, but this didn't sound like the turbo at all. Sounded almost like a continious door chime.





Thanks