Dennis
speedometer
Thread Starter
Advanced
Joined: Jul 2006
Posts: 72
Likes: 0
From: Maumee OH
speedometer
The speedometer on my C1 goes crazy bouncing wildly and making a grinding noise. Then it will operate properly for awhile. This happens on a regular basis. The odometer seems to be ok. Any ideas what is going on?
Drifting
Joined: Nov 2003
Posts: 1,645
Likes: 65
Soundds like the speedo head is ready to lock up. If you want to save the cable disconnect at the head connection to the speedo (cluster end). It sounds like you will need a the speedmeter need a rebiild, if you post Jason will answer and come back with the information.
Burning Brakes
Joined: Jul 2003
Posts: 868
Likes: 5
the C1s had a few issues...one on the main frame they used a pot metal where the #1 gear goes through and with 40 years or heat and dried grease they fail.They also had copper speed cups that gave way and failed more than likely causing the noise...You can try and lube the cable first but I'll bet you'll need a speedo rebuild.
Thanks
Jason
VetteInstruments@aol.com
Thanks
Jason
VetteInstruments@aol.com
Safety Car
Joined: Feb 2006
Posts: 4,142
Likes: 705
I had the same problem with a cable driven tach in a non Corvette vehicle. The needle would bounce and the tach would make a helluva racket, especially when cold. Finally, one day it quit working . Replaced the tach with a brand new one. New tach, old cable, needle bounces and tach makes heckuva noise.........( AAARGH!)
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette & Porsche 911: How Two Icons Conquered the Last 25 Years
Joe Kucinski
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!
Michael S. Palmer
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
Race Director
Joined: Jun 2006
Posts: 17,901
Likes: 751
From: Inverness FL
St. Jude Donor '07
Originally Posted by amcmast
Any idea how much a speedo and tach rebuild might cost?
VetteInstruments@aol.com
Bill
Drifting
Joined: Dec 2004
Posts: 1,345
Likes: 3
If the speedo works OK occationally, I'd bet on a kinked or ONCE KINKED cable. Before rebuilding the speedo head, I'd try a new cable and housing. The speedo head won't heal itself, the cable can go through spells where the kink effects the speedo and spells where the it finds an axial location that lets it work smoothly.