[Texasdoc]

I'm thinking it is probably the sensor wire. I'm going to pull the old wire and install an entire new run. Should this sensor wire be shielded any grounded on the sensor end?

For future searches: What I've learned is the Tremec's built-in sensor is an inductive sensor (not hall-effect). The plug for the electronic speed sensor is a 2 pin Delphi connector. This is located on the right side of the TKO.

Some people also suggest adding a diode on the "sensor wire". There is some discussion of electronic noise picked up by the gauge thru the sensor wire.

Edit: looks like if running an inductive sensor, you need to use shielded wires. If using a Hall-effect sensor, you use the diode.