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Speedometer jumping around, odometer works fine

4.4K views 3 replies 3 participants last post by  90 dually  
#1 ·
I just bought a '90 D350 with a 5 speed trans. and the speedo jumps around like crazy but the odometer works fine.

Is this a common problem?

If so, what is the fix?

Thanks in advance
 
#2 ·
It's pretty common. Replacing the Vehicle Speed Sensor should fix the problem. Before you replace it though, make sure it's not just loose. The sensor is on the drivers side connected to the trans. I believe. You can find more by typing vehicle speed sensor in the search box. Good luck.