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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: 81ChevyCheyenne on March 03, 2006, 01:35:00 pm

Title: Speedo Making Noise?
Post by: 81ChevyCheyenne on March 03, 2006, 01:35:00 pm

My 1981 InLine 6 is making a scrubbing scraping noise that is intermittant. It starts very slowly with speed and gets to be constant as speed increases. Also, no noise at idle. It is not wheels scraping and does not appear to be tied to the rotation of the tires or belts as it would do this at idle. What I need to know is..... Could it be the speedo cable? If so, can you lubricated it? And How? Any suggestions welcome!

81ChevyChenne

Title: Speedo Making Noise?
Post by: Lt.Del on March 03, 2006, 03:21:00 pm

I would check front wheel bearings or driveshaft ujoints.  You say that it is not wheels scraping or tied to rotation, but I think if you check these items, you may find what you are looking for.

just a thought
SgtDel

Title: Speedo Making Noise?
Post by: 85silverado on March 03, 2006, 06:15:00 pm

I've had that problem before, it was the speedo making noise. I had to take out the guage cluster and remove the speedo and then lube it up.

Title: Re: Speedo Making Noise?
Post by: 81ChevyCheyenne on March 13, 2006, 12:32:00 pm

Someone suggested lubing the speedo... How is that done and with what kind of Lube? Do I remove the whole cable or just one end?

81ChevyCheyenne

Title: Re: Speedo Making Noise?
Post by: roundedline on March 13, 2006, 05:17:00 pm

Lithium grease sprayed down the end of the cable from the speedo cluster end.

Chris Lucas
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Title: Finally speedo Noise is Gone!
Post by: 81ChevyCheyenne on March 23, 2006, 12:12:00 pm

Thanks Guys! I was able to remove the speedo cable and spray the lithium grease into the end. This cleared up the scraping noise. I did try to allow time for the grease to run down the cable by holding the end up and using gravity.

Thanks!

81ChevyCheyenne