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911 Carrera Speedometer Fluctuation and Inoperative Upshift Light

Electrical and Electronic

Vehicle Information: Model: carrera; Year: 1984; Body Type: Coupe; Engine (type, size, modifications): 3.2L; Total Mileage: 103,000;

On the way home my speedometer started to fluctuate between 60-80,bouncing around as I was on the interestate going about 60. Then, after astop, when I started to upshift I noticed my "shift arrow" light (Iunderstand this light tells the driver when to upshift) becameinoperative as well. Where should I start to look?

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