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Old 07-29-2007, 09:36 PM   #1
70' GMC
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Question Needle???

my mph needle when it goes from 0 to 30 the needle shakes makes kinda like click clack sound
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Old 07-29-2007, 09:56 PM   #2
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Re: Needle???

the speedo cable needs cleaned, and then lubed with graphite.

Last edited by Longhorn Man; 07-29-2007 at 09:56 PM.
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Old 07-29-2007, 10:07 PM   #3
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Re: Needle???

mine used to do that, i took out the inner cable, coated it with white lithium grease and slid it back in. Worked great!
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Old 07-29-2007, 10:45 PM   #4
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Re: Needle???

I wouldn't use any kind of grease
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Old 07-29-2007, 10:48 PM   #5
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Re: Needle???

why not use grease? White lithium grease resists all moisture and probably will never dissolve or age.
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Old 07-29-2007, 11:25 PM   #6
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Re: Needle???

While I think Andy's right about using graphite, I didn't know about that when I lubed my cable with white lithium grease many, many years ago. It's still working fine.
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Old 07-30-2007, 10:56 AM   #7
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Re: Needle???

I used to use gear oil.
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Old 07-30-2007, 10:33 PM   #8
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Re: Needle???

could I get directions with pictures????
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Old 07-30-2007, 11:45 PM   #9
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Re: Needle???

I think the reason that they don't recommend grease, is that in dusty environments dirt tends to stick to the cable. Here in Texas we have a lot of caliche (limestone), gravel and dirt roads that are extremely dusty when dry. If you use any kind of grease or oil they get pretty nasty looking.

I'd say if its mostly city driving, lithium lube or a lite oil would be okay.
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Old 07-30-2007, 11:50 PM   #10
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Re: Needle???

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Originally Posted by 70' GMC View Post
could I get directions with pictures????
You should be able to just reach behind the instrument panel where the cable connects and disconnect it from there. Pull the cable out from the sheath with a pair of needle nose or duckbills.

After cleaning and lubing (or graphiting) slide it back in until it's all the way in.
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Old 07-30-2007, 11:54 PM   #11
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Re: Needle???

so you can just pull it out from the speedo end and put back in the same way and thats it???
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Old 07-31-2007, 12:04 AM   #12
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Re: Needle???

the grease causes drag and over the years the accumulation of the metal residue cloggs the cable // thats why the manufacturers came up with the speedo cable lube as it polishs the inside of the housing for a friction free turning of the cable
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Old 07-31-2007, 08:26 AM   #13
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Re: Needle???

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so you can just pull it out from the speedo end and put back in the same way and thats it???
That's what I've done on mine. The cable has squared off ends that fit into corresponding holes in the speedometer and the transmission gear.

Now if your casing looks dirty and you want to do a complete clean and lube then I would disonnect from trans end also and remove the whole cable and casing.
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