Speedo Problems

[NJSHO]

Since Ive had my car, the speedo needle has shook. I finally decided to replace the upper speedo cable and that solved the shaking. I then saw that my speedo was about 10mph off from what it should be. I recalibrated it by driving on the highway and taking the needle off and placing it on 60mph when I was traveling @ 1 mi per min. All seemed well until it got cold. Since then it sometimes would read correctly, sometimes not. I left the plastic cover that goes over the gauges off, and when the speedo wasnt reading correctly I could just tap it to the right speed and it would stay reading the right speed for some indeterminate amt. of time. After getting fed up with doing that, I went ahead and replaced the lower speedo cable. Now my speedo is back to shaking, but only at speeds above 50 mph. At this point I am thinking that I might need a new speedo head or that the cable is routed funny. Any body have any ideas?

 

[sdpatt]

It sounds as if the speedometer needle's bearings may be sticking. With the head out of the dash, use a lightweight machine oil to lubricate the needle bearings on the indicator needle's shaft.

 

[NJSHO]

How do I get to the needle bearing once the head is out of the dash?

 

[SHO_Driver]

Should be able to spray it from the back. It stopped the sqeaking noises I was getting and the shaking. I removed the whole speedo and sprayed some on the front too, hard to clean that oil from the face tho.