94 4.6 speedometer not working

[mramd123]

my 94 4.6's speedometer doesn't work, it will jump up to about 30 when driving and just stay there. I took the dash apart and cleaned the electrical connections, but it still does it. I've heard there is a speed sensor somewhere which might be to blame. Any advice would be appreciated. Also, the gas guage doesn't work either.

[villae]

Sound like to me that the speedometer is bad, not the speed sensor. I had almost the same problem. I went to my local junk yard and pull use speedometer, and change with no problem it did not need update the computer.