Is speedometer gear driven or electric?

[Nick_rp]

Like title says.

I have an intermittent needle lag between 15-45mph.

Thanks

2012 ram sport 5.7

 

[muddy12]

Pretty sure it’s electronic.
I had similar symptoms on a 99 that I used to have. Turned out to be contamination (metal particles) on the rear axle speed sensor.
However, I’m not sure where the sensor is on the 4th gens.


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[circuitguy]

The complete gauge cluster is electric. You could have a bad speedo stepper motor in the cluster, this is what makes the needle move up and down. This happens often on older trucks.

 

[Nick_rp]

The complete gauge cluster is electric. You could have a bad speedo stepper motor in the cluster, this is what makes the needle move up and down. This happens often on older trucks.

Sweet sounds easy thanks for the input.

 

[McBroom]

Pretty sure it’s electronic.
I had similar symptoms on a 99 that I used to have. Turned out to be contamination (metal particles) on the rear axle speed sensor.
However, I’m not sure where the sensor is on the 4th gens.


Sent from my iPhone using Tapatalk

^^^X2^^^ I it is electronic because they have to use a computer to adjust it. Mechanical would involve going under and changing the drive gear in the tranny


I Love my 18 Ram 2500HD 4x4 CC
Blue Streak Pearl off-road

 

[Ramitiner]

It's electric, boogey woogey