I used WD-40 after pulling the cable out of the car. You can try just pulling the cable off of the transmission, pulling the gear off, then squirting the oil of your choice in the end. It is probably best to remove the cable from the gauge cluster inside the car. That is a lot of work so you may want to try from the trans first then if that doesn't fix it work from the gauge cluster end. It worked for me 6 years ago on my 1990 mustang lx 50 and no problems since.
Trouble? Noise maybe or a wild speedo gage? Unscrew the cable at the dash side (from under the hood) and spray some WD40 inside the cable. Try that or replace the cable.
The cable needs lubricating. Remove the speedometer cable and lubricating it with special lube for that purpose. Any auto parts store can provide the proper lube. Remove the cable and clean it throughly with spray brake cleaner. Let it dry and apply the lube. Reinstall the cable and you should see the needle stop jumping and making noise.
It's usually the cable or the speedometer head in the dash that have problems Is it possible to lubricate the where the cable and the speedometer head cluster meet? If so, how do you get into the head or cluster?
Fixing it depends on what the speedometer is doing. Chances are its making a funny noise and the needle is bouncing around. This would be due to a damaged or unlubricated speedometer cable. It is a cable that spins around in a plastic sheath connected to the back or your speedometer and to your transmission. Often times removing it and filling it with graphite powder will solve the problem. If its severely damaged you can replace it with a new one. If the cable isn't the problem you may have to replace the speedometer itself.
Not lubricated
Yes, if it has a mechanical speedometer. It can also be a relay that is clicking.
a lifter
I believe the head is the part of the speedometer that is directly behind the faceplate of the gauge. It takes the input from the cable spinning at X rpm's (or sensor if electronic) and converts it mechanically into what your speedometer gauge indicates on the faceplate.
You could disconnect the cable down at the transmission, drive it around, and see if the noise has quit. Some cars don't have a cable-the speedo is electronic, so then you might have a vacuum leak somewhere under the dash.
Check your input on your guitar, or check your cable...
The speedometer cable is either worn out or loose.
cable could be loose or faulty speedo..