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Joined: Feb 2005
Posts: 17
Grease Monkey
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Grease Monkey
Joined: Feb 2005
Posts: 17 |
Can anyone out there tell me how to fix a speedometer from jumping all over the place? Up to 40mph it works pretty good, after that it starts to jump up to 80 then back to 60 then up to 70 and you get the picture. Is there a cure for this?
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Willwood Engineering
Wilwood Engineering designs and manufactures high-performance disc brake systems.
Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188
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Joined: Sep 2004
Posts: 382
Backyard Mechanic
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Backyard Mechanic
Joined: Sep 2004
Posts: 382 |
Sometimes it is as simple as just replacing the cable.
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Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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Joined: Dec 2001
Posts: 10,379 Likes: 1
Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
Posts: 10,379 Likes: 1 |
Most likely it is in the speedometer cable. Take the cable loose at both ends (speedometer/transmission) and remove the inner cable. If it has residue or caked lubrication you cad clean it with WD-40. When clean, lubricate the bottom 3/4 with motor oil or very light grease. Reinstall and take it for a test drive. If the problem still exists then the speedometer must be removed, cleaned and lubricated. If you don't feel comfortable with that project it is time to send to a speedometer shop. 
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Joined: Feb 2005
Posts: 17
Grease Monkey
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Grease Monkey
Joined: Feb 2005
Posts: 17 |
Originally posted by AntiqueMechanic: Most likely it is in the speedometer cable. Take the cable loose at both ends (speedometer/transmission) and remove the inner cable. If it has residue or caked lubrication you cad clean it with WD-40. When clean, lubricate the bottom 3/4 with motor oil or very light grease. Reinstall and take it for a test drive. If the problem still exists then the speedometer must be removed, cleaned and lubricated. If you don't feel comfortable with that project it is time to send to a speedometer shop.
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Joined: Feb 2005
Posts: 17
Grease Monkey
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Grease Monkey
Joined: Feb 2005
Posts: 17 |
Thanks for the reply. The speedometer cable is new and lubed, so I think my problem is in the speedo head. I've never taken one apart, so I hope it's not to hard. I'm pretty good at fixing things, so I think I'll give it a try.
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