Ok, Time to troubleshoot my Speedo.

ok this speedo has never worked since i bought the truck. I've replaced the Speed Distance sensor in the transfer case but to no avail the speedo still doesn't work (the Odometer also doesn't work) so any advise would be welcome.

 

i just had mine go out on a trip thear should be a plastic box that your speed sensor screws to and then that screws to the trany or transfer in my case that ie set up to corect the ratio for the speedomiter this is what went out on my truck and when it went my overdrive would not enguage eather but it is some whear to start good luck with it now all i got to do is get the gremlin out of my wiring harness got this bad habit of loosing my marker lights on top of my cab