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6/7/14 9:18am - Original Message: 'my speed ometer dosent work'
keith's 79 mako
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hamilton, OH - USA

1979 coupe 350/350 rough but running

Joined: 5/24/2014
Posts: 2
ok i need help i got the speedometer cable replaced my car was a cruise control car i bought the cable for a non cruise car i checked the cable drive gear and the gear inside the trans i know the speedo its self moves freely soo eveything is good but the speedometer does not work still WHY?
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6/7/14 10:38am - Reply: 'Re: my speed ometer dosent work'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

#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: 19511
 I'm confused...again...LOL
Does the car have cruise now, or has it been removed? The speedo cables for cruise/non-cruise are different, since cruise cars have two cables. The cable from the trans to the cruise transducer has a threaded barrel fitting on both ends.....cables for non-cruise have the barrel fitting only on one ends, and the other ends is a female slip-fit into the speedo head.
Does the transmission end connect directly to the trans speedo gear housing, or does the trans have a 90 degree adapter on it that the cable attaches to?
There are two gears on the trans that operate the speedo....one in the gear housing, and the drive gear on the tailshaft of the trans. BOTH must be in good shape.
If you connect the cable to the speedo head in the gauge cluster, can you spin the cable on the trans end and see the gauge move? If so, then one or both of the trans gears(or the adapter, if present) are at fault. Thumbs Up

Joel Adams
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