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08-10-2011, 11:01 PM | #1 |
Senior Member
Join Date: Jul 2011
Location: South East Michigan
Posts: 229
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Speedo not working-cable or Speedo unit?
Last week the speedometer started making a "clink-clink-clink"sound then stopped working. I ordered a new cable,and installed it. I noticed the speedo input turned a little hard so I lubed it with a little lock oil. The cable was broken down near the drive gear. When everything was back together,it still did not work. Is my speed head broken inside? Its a Stewart Warner oval head,that shows 66K,and the lead seal is still in place.
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08-11-2011, 12:13 AM | #2 |
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Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: Speedo not working-cable or Speedo unit?
Remove the cable from the speedometer and see if the speedo turns easily. My bet is that it needs to be freed up and lubed.
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08-11-2011, 06:02 AM | #3 |
Senior Member
Join Date: Jul 2011
Location: Southern CT & Southwest FL
Posts: 115
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Re: Speedo not working-cable or Speedo unit?
I would also check the speedo drive unit on the drive shaft. It's an easy job to take it off and have a look. When I needed one for my car I found a couple that were stuck.
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08-11-2011, 12:20 PM | #4 |
Senior Member
Join Date: Aug 2011
Location: san diego
Posts: 114
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Re: Speedo not working-cable or Speedo unit?
keep your old speedo cable, cut it down so you can put it in a drill and test the speedometer. Drill goes in reverse.
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08-11-2011, 12:22 PM | #5 |
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Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 9,115
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Re: Speedo not working-cable or Speedo unit?
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08-11-2011, 01:38 PM | #6 |
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Join Date: Jul 2011
Location: South East Michigan
Posts: 229
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Re: Speedo not working-cable or Speedo unit?
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If you think SBC's are "Old School" you are not old enough. |
08-11-2011, 01:31 PM | #7 |
Junior Member
Join Date: May 2010
Posts: 28
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Re: Speedo not working-cable or Speedo unit?
Your speedometer probably has dried out hard grease on the input gears and the old lube on the odometer number wheels that has them seized up so they won't turn. Do not keep trying to make it work as you will only strip gears and ruin your speedometer. It needs to be diassembled, cleaned and lubed. This can happen when one of the number wheels tries to turn to the next digit when it hasen't moved for years.
Peteva |
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