Speedometer jumping around - Team Camaro Tech
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post #1 of 14 (permalink) Old Apr 12th, 10, 08:00 AM Thread Starter
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Speedometer jumping around

hi
when driving the speedometer jumps around a couple miles per hour up and down, the cable is new and the transmission gear at the transmission is also new,muncie 4 speed in a 67, any thoughts?
thx scott
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post #2 of 14 (permalink) Old Apr 12th, 10, 11:06 AM
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Re: speedometer jumping around

Jumping needle is either "lube required" or a kink. Pull the inner cable out from the speedo side and inspect. Could also be a damaged disc in the speedo.

Kevin


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post #3 of 14 (permalink) Old Apr 12th, 10, 12:40 PM Thread Starter
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Re: speedometer jumping around

Quote:
Originally Posted by KevinW View Post
Jumping needle is either "lube required" or a kink. Pull the inner cable out from the speedo side and inspect. Could also be a damaged disc in the speedo.

thx for the reply
same effect with two different speedo units, i have not checked lube,
ill try that
thx scott
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post #4 of 14 (permalink) Old Apr 12th, 10, 12:45 PM
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Re: speedometer jumping around

Sorry to jump in but what is the best way to lube the speedo cable?

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post #5 of 14 (permalink) Old Apr 12th, 10, 12:49 PM
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Re: speedometer jumping around

Found this thread: https://www.camaros.net/forums/showth...edometer+cable

68 RS Coupe 355/350 TH, Detroit Speed, Hotchkis, Vintage Air, 8.5" 3.42 posi 10-bolt, MagnaFlow 2 1/2" exhaust, etc.

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post #6 of 14 (permalink) Old Apr 12th, 10, 01:25 PM
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Re: speedometer jumping around

Bearing grease is good for lots of lube points (window tracks, speedo cable, etc). The cable has a stop collar on the speedo side, you can just pull it out. Watch out for the cable whipping around the interior get grease spots all over. Lube the cable by hand and shove some grease in the sheath. then push cable back in sheath, extra lubing as you go. While it is out, check for kinks. you will have to turn the cable to hunt for the opening in the trans gear. Just keep a little pressure while you are turning until it slides in and you cannot turn it anymore. Luck!

Kevin


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post #7 of 14 (permalink) Old Apr 12th, 10, 01:36 PM
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Re: speedometer jumping around

NEVER lube with oil..the oil climbs up the cable, gets into the speedo
Pull the inner out from the bottom, wipe gease into it and wipe off the access
Push back up, you will feel it 'drop' onto the speedo, then connect to the trans.

Also if jumping around it could be the circlip in the tail shaft has come loose and the tail shft drive gear is slipping.

My Spelling is not incorrect...it is creative

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post #8 of 14 (permalink) Old Apr 15th, 10, 07:35 AM Thread Starter
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Exclamation Re: speedometer jumping around

greased the cable and alls well!!
thx scott
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post #9 of 14 (permalink) Old Apr 15th, 10, 07:56 AM
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Re: speedometer jumping around

I was told a long time ago about using powdered graphite and rubbing alcahol to lube speedo cables.

Mix rubbing alcahol and powdered graphite in a spray bottle.. the alcahol penetrates into the cable carrying the graphite with it. The method has worked for me and doesnt gum up down the road like other lubes.

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post #10 of 14 (permalink) Old Apr 15th, 10, 08:13 AM
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Re: speedometer jumping around

Quote:
Originally Posted by Jeremiah View Post
I was told a long time ago about using powdered graphite and rubbing alcahol to lube speedo cables.

Mix rubbing alcahol and powdered graphite in a spray bottle.. the alcahol penetrates into the cable carrying the graphite with it. The method has worked for me and doesnt gum up down the road like other lubes.
http://www.camaros.org/forum/index.php?topic=5984.0
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post #11 of 14 (permalink) Old Apr 16th, 10, 07:45 AM
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Re: speedometer jumping around

Mine does the same and its a new cable into a tremec.

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post #12 of 14 (permalink) Old Apr 22nd, 10, 09:55 PM
Lee
 
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Re: Speedometer jumping around

pardon my ignorance, but where is the speedo cable located at on the transmission? and my tach kinda just flipped all the way around and stayed there... any help with that??
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post #13 of 14 (permalink) Old Apr 23rd, 10, 04:04 AM
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Re: Speedometer jumping around

Lee, speedo cable goes in the tailshaft close to the end of the trans. Tach's are electronic, either polarity was switched or a short or the needle loosened up. Check the needle first. If the needle is tight, then the tach may be damaged internally.

Kevin


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post #14 of 14 (permalink) Old Apr 23rd, 10, 09:47 AM
Lee
 
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Re: Speedometer jumping around

alright thanks ill have to check it out
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