99 ford expl speedometer problem

Usually if both the odometer and speedometer stop working, the problem is the speed sensor on the transmission. You should also have a trouble code in the engine computer.
If one component works but the other does not, the problem is usually the speedometer head in the dash.

the odometer works on a drive from the spedo. if the odometer does not work but the spedo does then you will have to replace the spedo assy.

It sounds like you need a new speedometer head, the cable is good , spraying from the front would do nothing.

96 explorer xlt 4x4 speedometer not working

The gear in the speedometer assembly is broken causing the odometer and trip odometer to be inop. You can either buy a new speedo head or buy a gear kit from an online source (google Ford speedo odometer inop)for the kit.

SOUNDS LIKE THE GAUGE CLUSTER IS BAD OR HAS A BAD GROUND

The problem is going to be a worn or broken odometer gear. You can purchase the gear at odometergears.com for $29.00 with the shipping. Follow their how to repair on the Mustang to help in the repair. I believe you will have just the worm gear to replace.
http://www.odometergears.com/subpages/MustangHowTo.html

Since your speedometers work, the problem is in the gearing to the trip and mileage odometers. Simple problem, major pain to fix but, remove instrument cluster - you'll have to remove speedo cable to get it out. Use the old Mark I eyeball to check for broken parts. Might even have to drop steering column - disconnect air bag first!

speedomenter cable may be broke or speed gear may be bad

Check the speed sensor in the transmission.
Being a 95 it might still be cable driven. Disconnect the cable from the transmission and hook a drill to it. Spin it and see if it registers. If it does, the gear going into the tranny is broken, if it doesn't the cable is probably broken.