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Topic: Speedometer inop

in Forum: C3 Interior

Speedometer inop

Posted: 6/13/11 8:11pm Message 1 of 4
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Walla Walla, WA - USA
Joined: 12/2/2007
Posts: 52
Vette(s): 1978 L-82 Pace Car
Speedometer quit working this weekend found that the plastic end of the cable from the tranny to transducer had broke off in the transducer, tried to spin the transducer but it was really tight and then would spring in the opposite direction, my question is should I just try replacing the cable or should I replace it and the transducer?


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Speedometer inop

Posted: 6/14/11 5:13am Message 2 of 4
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Sykesville, MD - USA
Joined: 4/27/2008
Posts: 4239
Vette(s): 1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops
If you want your cruise control to work you would have to replace the transducer. If not, you would have to get a cable to go from the speedo to the trans. It sounds like your transducer has bit the big one! BTW, those transducers are a PITA to replace.
 
Barry
 
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Speedometer inop

Posted: 6/14/11 10:11am Message 3 of 4
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
The transducer is done for. Replacing the cable will only twist the end off the new cable. The transducers get moisture in them, and rust up, and the grease used on the gears gets hard/gummy. That is what causes the thing to lock up, or get so hard to turn that it twists the end off the cable.
You can get a cable to go directly from the trans to the speedo head, but then you wont have cruize.
So...either replace the transducer, or do without cruise. You might find a place nearby that rebuilds the transducers, but those places are few and far between.



Joel Adams
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Speedometer inop

Posted: 6/14/11 4:42pm Message 4 of 4
Former Member
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Walla Walla, WA - USA
Joined: 12/2/2007
Posts: 52
Vette(s): 1978 L-82 Pace Car
Thanks for the info I will go ahead and replace the transducer and cable, always great info on this website


in Forum: C3 Interior


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