Corvette Speedometer Repair, Rebuild, and Restoration
Corvette speedometer repair, rebuild and restoration is a specialty here at Corvette Specialties of MD West
AC Division of General Motors manufactured Corvette speedometers using a series “W” style frame. There are several variations through the years in appearance. The mechanisms are very much alike.
Corvette odometer not working?
Corvette speedometer needle jumping?
Corvette speedometer has a broken pointer?
Corvette speedometer noisy, squealing?
Corvette speedometer looking tired?
We can help. We have all of the parts, equipment, and experience to restore your speedometer.
Typical problems with Corvette Speedometers
Let’s face it, these are old cars we are working with! Father time does not overlook speedometers. The C1, 1953-1962 Corvette speedometers that have not been professionally serviced need to be serviced. Typical problems would be a loud squeal, pointer jumps wildly and often snaps. The magnet spins in an aluminum housing without a oil impregnated bronze bushing. Lubricant has degraded and it fails. Another common failure is the speed cup. C1 Corvette speedometers used a speed cup that was soldered together. (Revision improved the design in very early 60’s) Simply stated, the shaft that holds the pointer becomes disconnected.
1963 and later
Corvette began using a trip odometer in the 1963 model year. This is where the fun began. Commonly the 1963-1967 Corvette speedometer would experience an odometer failure between 40,000 and 60,000 miles. The speedometer will continue to operate just fine in most cases. Some other issues that arise are a pointer that jumps erratically, an audible squeal, or a complete breakdown. Professional Corvette Speedometer service is needed. Our services are comprehensive, and will also accomplish the Corvette odometer repair.
Speedometers that are 50 years old need to be rebuilt, period. Does not matter what the mileage may be. Time really contributes to the problems. Lubricants that were used when these units were assembled deteriorates and turns to a wax like substance. Most of the time, when we disassemble a unit that has never been serviced, it is nearly dry. The magnet, or first worm, is turned by the cable at a high rate of speed. Parts wear out, gears wear, (see worn magnet below) and eventually strip, and failure occurs. Repair is not a matter of replacing the second and third worm gears. Corvette owners that are familiar with the distributor side gear arrangement will understand it would be easy to change one gear. The outcome is not good when replacing a driven gear without the main drive gear.
Corvette Specialties of MD West has rebuilt thousands of units.
The magnet is what drives these gears, and those magnets do wear out. We have the necessary special tools and calibration equipment to replace worn magnets. It is important to thoroughly inspect the frame that houses the magnet. AC speedometer began using an oilite bushing for the magnet some time in the 1962 model year. We have the bushings and tools needed to replace. There is also a hole for the second worm gear that can wear. We replace frames with worn worm gear holes. The frame must pass inspection to prevent premature failure.
Have confidence when sending your valuable instruments for restoration.
Corvette Specialties of MD West has the experience, the necessary parts, special tools, and calibration equipment to make sure the job is performed properly. You may have a speedometer or tachometer that needs repair and not a restoration. The car may be a survivor, unrestored, etc. We certainly understand and will accommodate the owner in most cases. 1953-1962 speedometers mounted in a case can be the exception. Often the case, and inner plates, will have paint that is flaking upon disassembly and if that is the case Corvette Specialties of MD West will media blast the old paint, and repaint these finishes. We do not want unhappy customers with paint flecks in their gauges!
Corvette Speedometers 1953-1962
Base cost $125.00*
Includes disassembly, clean, restore case, rebuild or replace internal mechanism, and calibrate.
+$45.00 Refacing (applies to 59-62)
*Typical completed cost $225.00-$400.00 including parts. 53-58 Tachometer, speedometer, & small gauges may require refinishing Lens Backplate at an additional charge of $20.00 per unit.
**We stock quality, reproduction chrome bezels and correct odometers for these Tachometers, Speedometers, and small gauges. These bezels would be an additional charge to the above prices. See Restoration Products for pricing.
We reface tired 1959-1962 Speedometer Faces White or Green
Corvette Speedometers 1963-1967
Base cost $75.00*
Includes disassemble, clean, rebuild or replace, internal parts, repaint pointers as required, calibrate.
Add +$35.00 for 67 speed warning Speedometer.
Add+$110.00 for trip and total odometer replacement.
*All parts, refacing, touch up red-line etc. extra. Typical completed cost: $150.00-$225.00 each, including parts.
Pictured above are views of a good magnet, or first worm, and a worn part. Replacing second and third worm gears with a worn magnet will not solve the inoperative odometer problem!
When sending speedometers for service, consider your tachometer. They are the same mechanism. They also wear and grease dries out. The main difference is the tachometer does not have odometers.
Corvette Speedometers 1968-1977
Base cost $75.00
Add +$85.00 If we Restore Inner and Outer Bezel
Add +$35.00 for 68-69 Speed warning speedometers
Additional $110.00 if necessary to replace the trip and total odometer replacement.
***PLEASE NOTE: We no longer repair/restore 1978-1982 Speedometers.***
We have the special tools to properly service your instruments.