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6/13/11 11:11pm - Original Message: 'Speedometer inop'
pa78ce
Former Member
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Walla Walla, WA - USA

Vette(s):
1978 L-82 Pace Car

Joined: 12/2/2007
Posts: 52
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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6/14/11 8:13am - Reply: 'Speedometer inop'
Jaws79 Lifetime Member
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Sykesville, MD - USA

Vette(s):
1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

Joined: 4/27/2008
Posts: 4211
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.
 
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6/14/11 1:11pm - Reply: 'Speedometer inop'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

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

Joined: 11/8/2003
Posts: 19449
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.


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6/14/11 7:42pm - Reply: 'Speedometer inop'
pa78ce
Former Member
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Walla Walla, WA - USA

Vette(s):
1978 L-82 Pace Car

Joined: 12/2/2007
Posts: 52
Thanks for the info I will go ahead and replace the transducer and cable, always great info on this website

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