Was there any unaccounted time on you way to work? Did your wrist watch go crazy? What about the radio? any interference? Sorry Greg maybe I have been watching too much UFO Hunters on TV!
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| Speedo Question for you notherners https://slantsix.org/forum/viewtopic.php?t=33362 |
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| Author: | Greg Ondayko [ Sat Jan 17, 2009 3:14 pm ] |
| Post subject: | Speedo Question for you notherners |
So I was driving my truck today.. Temp at startup was a balmy -8*F and I'm driving to work when all of the sudden the speedo goes looney on me suddenly 60MPH now registers as 100MPh and it's making all kinds of racket.. Once the outside temps got to 10-15* F during the day it seemed to be all better. Anyone else experience this in the cold? Oh yeah I have never had any other speedo trouble with this truck ever! Greg[/list] |
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| Author: | Joshie225 [ Sat Jan 17, 2009 3:52 pm ] |
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Sounds like the speedometer needs to be cleaned and lubricated. |
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| Author: | wjajr [ Sat Jan 17, 2009 4:04 pm ] |
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Yup common problem with old dried up cable lube. Has happend to every old heep I have had. After a while you will brake the cable. I think the cable fetches up than lets go along in there somewhere changing the rpm at the head. Also the guts of the speedometer may have contracted due to the coefficient of liner expansion from the cold causing the bits in the head to come in contact with each other. Let the cabin warm up a bit before taking off, if no crazy motion & noise it was the Speedo, if it keeps up it is the cable. We will be out of this little cold snap in a day or two, and wouldn't worry about it down in PA. |
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| Author: | sandy in BC [ Sat Jan 17, 2009 4:20 pm ] |
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Pretty typical cold weather behaviour. My EFI 73 Suburban has the Vehicle Speed Sensor (VSS) in the speedometer......60 km/hr swings in what it reads can have some effect ..... |
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| Author: | wvenable [ Sat Jan 17, 2009 4:32 pm ] |
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Was there any unaccounted time on you way to work? Did your wrist watch go crazy? What about the radio? any interference? Sorry Greg maybe I have been watching too much UFO Hunters on TV!
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| Author: | Greg Ondayko [ Sat Jan 17, 2009 6:12 pm ] |
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Quote: Was there any unaccounted time on you way to work? Did your wrist watch go crazy? What about the radio? any interference? Sorry Greg maybe I have been watching too much UFO Hunters on TV!
Naw, all of this was good. The cab just wont heat with the temps so low.. But Maybe when it's warmer I will check the cable and lube it / clean it. Greg |
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| Author: | illldeca [ Sat Jan 17, 2009 7:53 pm ] |
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i have a old 83 f150 and the speedo goes 80mph then broke lol |
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| Author: | wjajr [ Sun Jan 18, 2009 2:45 pm ] |
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wvenable: Quote: Was there any unaccounted time on you way to work? Did your wrist watch go crazy? What about the radio? any interference?
Safty First, here, help is only a click away:http://zapatopi.net/afdb/ |
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| Author: | wvenable [ Sun Jan 18, 2009 3:20 pm ] |
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| Author: | wjajr [ Sun Jan 25, 2009 9:26 am ] |
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Found this info in a "Dan" hot link on gage voltage limiters that addresses Speedometer problems: here More info on speedo and tach needles Reason 1 why speedo needles break: If the speedometer cable is dry and needs to be lubed, sometimes the cable will bind and then jump forward, causing the speedo needle to swing wildly and break. Reason 2 why speedo needles break: If the nylon bushing inside the speedometer is worn out and it allows the aluminum cup to touch the rotating magnet then the speedo needle can break. Another possible cause of trouble here is if the metal shaft in the speedometer gets rusty, then it takes a lot more force to move it, which can cause the the speedometer cable to twist up, then unspool quickly. Reason 3 why speedo needles break: If there are metal shavings or rust pieces stuck to the magnet which allow friction with the aluminum cup, then the speedo needle can be broken. Reason 4 why speedo needles break: If there is a problem with the gear inside the transmission it can cause the needle to break. Thanks to the tachman for this bit of info: http://www.tachman.com |
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