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6.9L Diesels Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

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Old 09-08-2005, 11:54 AM   #1 (permalink)
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Chattering speedometer

Hi guys, tis I again.

Got a question concerning my speedometer. At about 15 thru 55 it really makes alot of noise. I'm wondering if it's a drive cable issue or the gear inside that's gnashing away.

Any thoughts?
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Old 09-08-2005, 12:21 PM   #2 (permalink)
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Re: Chattering speedometer

It's the cable. Mine has been doing it for years, but been too lazy to replace it.
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Old 09-08-2005, 12:24 PM   #3 (permalink)
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Re: Chattering speedometer

Ok where can I get a replacement and how much?
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Old 09-08-2005, 12:37 PM   #4 (permalink)
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Re: Chattering speedometer

I bought one from AutoZoo and IIRC it was around $14...

~Vince

On edit: I believe they sell 3 different lengths. Whether or not you have cruise control will determine the length you need. If you have cruise, the cable is split into 2 pieces, just outside the firewall, where the sensor for the cruise fits in between the 2. You might be able to just change the short cable from the CC sensor to the speedo...or you could get the long cable and bypass it all and go straight to the speedo. Either way, fishing around behind the speedo is a PITA though.
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Old 09-08-2005, 01:24 PM   #5 (permalink)
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Re: Chattering speedometer

Is there anything in The Diesel Files about the replacement of said cable?

On another note, it would be nice to get my cruise control working again.
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Old 09-08-2005, 01:35 PM   #6 (permalink)
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Re: Chattering speedometer

Often the cable is chattering because it is dry. While it may not be a long term fix, you can often disconnect one end and get some oil in there, if nothing more as a test.
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Old 09-08-2005, 02:31 PM   #7 (permalink)
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Re: Chattering speedometer

Most likely it is the cable being dry. Some light oil should do the trick. If you have the adaptor under the hood for cruise, you should be able to disconnect it there and shoot some oil up in the housing.
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Old 09-08-2005, 02:53 PM   #8 (permalink)
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Re: Chattering speedometer

Speedo cables have a nylon liner (since the 50's). By the time you hear noise, the cable has worn through the liner. Lubing it won't make a lot of difference, and the difference it makes won't last long.

The cable's cheap. The labor is a bit more work than earning the money for the cable, but replacing it is a more permanent fix.
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Old 09-08-2005, 04:13 PM   #9 (permalink)
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Re: Chattering speedometer

Pull it out, clean it and apply a liberal amount of most any kind of grease. Chassis grease is fine. Usually always works.Jim
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Old 09-08-2005, 04:16 PM   #10 (permalink)
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Re: Chattering speedometer

I agree with Jim, I have always used some wheel bearing grease, but any kind of thicker grease would work.
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Old 09-08-2005, 04:32 PM   #11 (permalink)
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Re: Chattering speedometer

I have a tube of speedometer cable grease, looks like 20 wt or so oil, but it is full of graphite flakes. I have used it on several speedo cables and they have been going strong (and quiet) for several years. It is true that they are not real expensive, but I have put new ones on that sound louder than the one removed. Most come with a grease packet with what looks like the same substance this tube of speedometer cable lube I have looks like.
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Old 09-08-2005, 04:42 PM   #12 (permalink)
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Re: Chattering speedometer

Ford has a TSB about speedo noise. Basically they say don't lube it - replace it. Verify that it is properly attached everywhere, and no worn parts.
James
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Old 09-08-2005, 05:05 PM   #13 (permalink)
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Re: Chattering speedometer

I'll call Schmucks tonight and see if they have one in stock.
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Old 09-08-2005, 05:08 PM   #14 (permalink)
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Re: Chattering speedometer

[ QUOTE ]
Ford has a TSB about speedo noise. Basically they say don't lube it - replace it. Verify that it is properly attached everywhere, and no worn parts.
James

[/ QUOTE ]

Ford makes money selling parts, would you expect them to tell you anything else?
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Old 09-08-2005, 05:28 PM   #15 (permalink)
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Re: Chattering speedometer

So do I squirt this junk in on the firewall side or the cabside, and do I need one of those special cable luber things like for motorcycles?
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