Noisy Tach is driving me crazy!
 

The stock Tach in my '90GT is making noise at about 2,000 RPM! Any of you had this problem or know what I have to do to fix it? I just don't know how a tach works, and I can not figure out what would be making noise! The spedometer, I can understand, but not my tach!?
Help please if you can...
Thanks
PS - she has nearly 130K on the ticker now, so maybe it is just plain worn out.

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Red '90 GT - My Daily Driver (& weekend warrior) w/ Kenny Brown braces & Springs, Koni Yellows, Caster/Camber Plates, Factory Five Control arms, Poly Bushings, 3.55 gears, Hurst shifter, Dynomax cat-back, Cervini 2 1/2 cowl. Griggs torque-arm, & panhard bar waiting for installation!
My other toys:
Viper Blue '85 GT Convertible - Subframes, Holley Street Avenger Carb, Polished ROH ZR6 wheels so far.
Black '95 VW Jetta VR6 - FOR SALE!!!