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speedometer issues

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Old Oct 29, 2024 | 06:00 AM
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wiredgeorge's Avatar
wiredgeorge
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speedometer issues

Driving along Hwy 90 going west at about 70-75 mph, the speedometer shot up about 25 mph while my speed didn't increase. Is the speedometer controlled electronically or is there a mechanical drive? Any tips to fix this would be appreciated. When the truck was turned off, the needle sat about 25 mph high.
 
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Old Oct 29, 2024 | 10:25 AM
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Eman85
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Electrical only. Diagnosis would be to monitor speed with a scan tool or some way of reading live data. If the readings are correct on the live data then I'd suspect the cluster.
 
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