i have a neighbor has a 99 24v when he takes off the speedo doesn't read until he gets up around 40mph then it reads correctly. but once he stops it goes back to 0 and stays there until he gets back up to speed. what does this sound like to you. and is the speedo mechanical or electronic.

danny

 

Sounds like there could be corrosion in the wiring that feeds to the rear diff sensor, or the sensor itself is starting to fail.

Before I replaced my rear diff sensor, my speedo wouldn't work, unless it was wet out. Once it was wet the moisture would enter the wires and allow the sensor to work. Finally took out my rear sensor, it was completely corroded and the white with red wire (If I have the colours right) had the "green death" in a section. My speedo also never worked until above a certain speed. Fixed the wiring and replaced the sensor and works great now.

 

does anyone have a picture or can tell me where it is at in the rear diff thanks danny.

 

Its right on top, should be the only thing with a wire connected to it.

 

bump back to top for more info

 

What would you like to know? I can grab a picture of the sensor for you if you would like.

 

that would be great that is what i am wanting

thanks

 

I'll get one as soon as I am up!

 

Hey Dwiit, sorry I took so long to get a picture.

Here are a couple I took this morning while working on the truck, hopefully they help.

 

thank you that is exactly what i needed

danny