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tach and speedo issue

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Old Jan 8, 2023 | 03:10 PM
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Default tach and speedo issue

Looking at a supercharged 2003 and starnge issue popped up. Car is an auto and when parked and starting up both the tach and speedo both move upon acceleration Revving the engine will run the tach up like normal bu the speedo moves up towards 100 at the same time Any ideas why and what to check? thanks
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Old Jan 8, 2023 | 05:32 PM
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Possibly a bad vehicle speed sensor if the speedo is wigging out.
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