I bought a new 91 dodge cummins. When i drove it home the speedometer read half of what speed i was actually going (ei. speedo read 20 mph. actually going 40 mph) Its got the electric speedometer in it. and it still has the factory gears in it and stock size tires. need to get this problem fixed before i can drive it daily. thanks for any help that you can give me.

joel

 

anybody?? would really like to know by the end of the week!

 

Um have you checked all the connections? Speed sensor?

 

sounds like you dont have the correct ratio dive adapter like scott said if it all hooked up shoot me a PM and I will get you set up

Brice