whistle noise at 2000RPM 3rd gear

[daniel]

in the morning or night, my car makes some kind of electrical interference noise at exactly 1950-2050rpm in 3rd gear. it is kind of a whistle noise that increases pitch as the RPMs increase. the headlights and stereo being on or off dont matter, which are the only variables i can think of that might influence this noise. the only constant i can think of is the air is damper in the morning and at night.

anyone else had this experience? any ideas for what it might be from?

thanks in advance

[416stroker]

bad ground?

[daniel]

im not sure... its hard to pinpoint where the sound is even coming from. what could make a noise like that? it isnt coming from the speakers.

[416stroker]

Its probably coming from your spedo or tach. Mine makes a quiet squeak like noise every now and then. When its cold out.

[daniel]

hmm i guess it could be from the tach itself. i guess i would have to take out the cluster to find that out.

thanks for your input.

[daniel]

update. it happens in all gears at 30mph. so i am guessing the sound is coming from the speedo and not the tach.