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Old 12-02-2003, 11:21 AM
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Speedo Cable Question

I hope this is the right spot for this, While I have the dash out the car I found the speedo cable coming out of the tranny into the cab. I have a brand new one in a box and was thinking I should just put it in while I'm there. But I notice the cable feeds into a small gear drive unit on the back of the speedo. Should I lube the gears in that with grease? also should I lube the new cables with grease as well? Is there an optimal angle for a cable so it doesn't effect the readings? I noticed when I was driving the car at low speeds the needle on the speedometer likes to bounce. I checked the feel of the gears and cable and they feel smooth. Any tips here are welcome

Regards
Mark

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Last edited by Jag Daddy; 12-02-2003 at 01:33 PM.
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Old 12-02-2003, 12:15 PM
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Needle flutter often is caused from dry surfaces in the cable to the trans. I'ts going to be a lot easier to change now then it will when it breaks.
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Old 12-02-2003, 01:29 PM
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Thats what I was thinking, but should I grease the rest of the stuff in the system? Also should I grease the new one before I install it?

Thanks
Mark
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Old 12-02-2003, 01:35 PM
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Can't hurt. I don't' see how anyway. Use some White Lithum
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Old 12-02-2003, 06:36 PM
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The only lubricant to use on a speedo cable is moly powder, there is a product called "Moly Ease" sold just for speedo cables. It comes in a small tube like graphite.

You can also buy moly powder bulk and mix it with alchohol to feed into the cable assy, thats how I do it. Oil or grease will freeze up in cold weather and cause your needle to bounce wildly until it warms up, dry moly powder is the best by far.

You can make your own moly grease with it too!
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Old 12-02-2003, 08:42 PM
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Ditto the moly powder.

Vince
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Old 12-03-2003, 02:04 PM
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Never thought of that. Better idea than mine.
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Old 12-03-2003, 10:23 PM
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Hey 4 Jaw where do ya buy that stuff????

Couldn't find it here at the local parts house.

Regards
Mark
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Old 12-04-2003, 07:30 AM
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Question

Would'nt dry graphite powder lubricant work sufficiently for this purpose also?
I have a container here in the shop, and never had a need to use it so far.

I have to replace, and in one case add, a couple cables on my projects this winter, so I am just as curious.

A quick search came up with this:
http://www.vibrashine.com/Merchant2/...egory_Code=VRP
They sell moly powder in a 3.2 oz. jar for $19.95 plus shipping.

Last edited by M&M CUSTOM; 12-04-2003 at 07:45 AM.
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Old 12-05-2003, 03:06 PM
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If it still jumps when you replace the cable it could be a bad speedo gear in your tranny. They are normally plastic and can be accessed through the tail shaft on the tranny.They are fairly easy to replace.
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Old 12-05-2003, 03:18 PM
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Quote:
If it still jumps when you replace the cable it could be a bad speedo gear in your tranny. They are normally plastic and can be accessed through the tail shaft on the tranny.They are fairly easy to replace.
Well I'm running a 700R4 tranny behind a SBC 400. Is that gear in the same spot?

Regards
Mark
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Old 12-05-2003, 06:59 PM
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[color=yellow]Anything you need to know about the 700R4, by one of HR.com's own can be found here.
Very informative site indeed.
[/color]
http://purplesagetradingpost.com/sum.../techinfo.html
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Old 02-09-2005, 12:51 PM
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just thought i'd dredge this up from the grave as i had my cable start freezing up on a 28 degree drive to work yesterday. headed out for some moly powder.

my lps doesnt have anything but graphite powder and also some speedometer cable lube. guess i'll figure it out there.

Last edited by bullheimer; 02-09-2005 at 01:16 PM.
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