2007 Dodge Truck ram need fixed

2007 DODGE TRUCK
150,700 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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JAYSTAC
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  • 1 POST
The speedo doesn't work right. It doesn't start to move until about 20 or 30. All other gauges work fine
Feb 5, 2014 at 4:40 AM
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WRENCHTECH
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 20,761 POSTS
It could be the Vehicle Speed sensor or the speedo head itself. You will need a lab scope to test the output signal coming out of the speed sensor.
Feb 5, 2014 at 6:14 AM
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WRENCHTECH
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 20,761 POSTS
Another point on that vehicle is that is likely has two speed sensors that are both associated with vehicle speed. One is in the tailshaft of the transmission and the other is in the top of the differential.
Feb 5, 2014 at 6:16 AM