I took the 69 out for a short test ride today. The speedometer was noisy but since it is below freezing I didn't worry about it. The car was in the garage prior so it was about 45 degrees. At around 35 MPH the needle moved to 60 than 100. and bounced around some. Do you think it is the speedometer or does the cable need to be lubed?

Its the cable, mine did the samething on a cooler day then it stopped working, I am sure the cable broke.

Dave

I don't know. I put a new cable and also put a tube of speedometer cable graphite oil on the cable and in the sheath that it is in while rebuilding the car. Mine is still making a racket and bounces. Not as bad as it did. Of course mine hadn't been driven in 17 years until recently. I am going to try and put a dab of oil in the speedometer housing where the cable goes in and put some white grease on the cable itself.
aggravating, isn't it?

My 64 SS speedo and odo was working fine. It's my regular driver getting about 300 miles per week on it. the speedo and odo worked fine for about 8,000 miles. Then it started bouncing around at speeds around 75 MPH. the other day, the speedo was working fine but the odo was not recording. Later in the day it was again working fine. This has happened twice to me, both on cold days and the ODO began working about 100 miles into my trip.
I'm going to try lube but I think mine must be in the head itself. I hate to have it rebuilt as it only has 91,000 miles on it.
It did sit only getting about 200 miles a year for 6 years so maybe that had some impact.
Tom

Mines doing the same thing when its cold...makes a horrendous loud buzzing noise and jumps around to 100 and back...Just picked up some graphite lube and going to pull the cable end from the trans connection and luber her up.....I will let you know if it works.

Had the same problem in my 66 C10 and my 71 Malibu. Never did get around to fixing it but I am pretty sure it was the cable.

Redline replaced the 40 year old lube in my speedo movement because they said it would cause erratic movement at times if it wasn't cleaned and re-lubed, I said ok. It works fine in the cold, maybe they were right.

Relube the cable. Use white lithium grease. I've seen this more than once. In fact, I need to do it to my 64.

Same thing happened to me on a cold day last 15 seconds then stopped.I'll bet the cable is ok just needs lube.

Well, I pulled the cable out from the dash side and lubed it with white lithium grease. I had previously used the graphite oil to no use.
I went for a drive a while ago and no more noise and the speedometer works perfectly.
Thanks!!!!

GREAT! I need to do it on mine. After I drove for about 5 minutes it stopped.