speedo or clock?

out driving last night .on deceleration the speedo needle was moving like a second hand clock,not smooth jumpy anybody else have this happen???

 

Not me but other people have complained about this. It sounds like the only fix was to have it replaced under warranty

 

Ok thx do you know is the speedo cable operated??

 

No I do not know. I doubt it since most of the components are software based not mechanical on our trucks.

 

Ya i guess its a module

 

I think I've seen mine jump a couple of times. I thought I was going crazy until I caught it a second time moving back and forth. My guess its electronic controlled. Analog is the thing of the passed but sometimes I do miss the accuracy...