First time swap started

[ls1nova71]

Definitely sounds like you have a bad connection in the speedometer somewhere. How did you attach the power, ground and speed signal wires to the circuit board of the speedometer?

[TrybalRage]

Originally Posted by ls1nova71

Definitely sounds like you have a bad connection in the speedometer somewhere. How did you attach the power, ground and speed signal wires to the circuit board of the speedometer?

The original flexible circuit board had little square metal tangs in it, I popped them out and soldered the wires to those tangs, then pressed them on to the pins on the back of the board. Works for every other gauge, maybe they're just not a solid enough connection for the speedo signal.

I was thinking of just soldering them right to the pins to secure them.