Ok I picked up another gauge cluster and nuttin seemed to change it didn't work, the only gauges that work is temp gauge, and battery volt gauge, and my old cluster is the same way. How come my speedo and tach don't work???????????????????????????

 

I would start by checking into the sending units, then the PCM. My temp gauge didnt work after swapping clusters, but that's cuz i had the idiot light before and went to the gauge, had to change the sending unit.

 

where can I find the sending units for each gauge

 

I think tach is on the distributer, but could be from the PCM, speedo comes off the back of the t case.

 

Speedo harness plugs into the transfer case.