Speedometer head scratcher (1982 Vette)
Thread Starter
Instructor
Joined: Jun 2015
Posts: 221
Likes: 13
From: Central Virginia
Speedometer head scratcher (1982 Vette)
My speedometer is registering 30 miles an hour too fast. Even if I changed the original rear end gearing to a 355 gear the speedometer shouldn't be this fast. The speedometer is a 42 tooth (green) and I should change that to a slower speedometer gear. Problem is there are not too many options left to do so. So why is my speedometer registering 85 MPH when I am doing 54 MPH. Can the transducer have anything to do with it? This is indeed a head scratcher.
Melting Slicks
Joined: Apr 2006
Posts: 2,211
Likes: 64
From: Bocabec, New Brunswick
My speedometer is registering 30 miles an hour too fast. Even if I changed the original rear end gearing to a 355 gear the speedometer shouldn't be this fast. The speedometer is a 42 tooth (green) and I should change that to a slower speedometer gear. Problem is there are not too many options left to do so. So why is my speedometer registering 85 MPH when I am doing 54 MPH. Can the transducer have anything to do with it? This is indeed a head scratcher.
Thread Starter
Instructor
Joined: Jun 2015
Posts: 221
Likes: 13
From: Central Virginia
Only one mod and thats changing the gears to a lower 3.55 gear ratio. No other mods. The original rear ratio was very high, something like a 2.11 or abouts. Before I changed the gear ratio the transmission shifted very late from first to second gear. Speedometer is U.S. However anything is possible.
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Melting Slicks
Joined: Sep 2008
Posts: 3,387
Likes: 150
From: Texas
Ok I know nothing about repairing speedometers so I thought I would ask here on this thread—does anyone on this site know of a good repair shop in Jefferson County Texas area, that can work on an 82 Corvette speedometer? When driving my 82’ Vette, the speedometer needle would frequently bounce around before it settled down while I was driving the car. Now, however, the last time I drove it (after taking it to a car show), it won’t register any speed at all. I am guessing that the cable broke but I am not sure where to take it for the repair. Any suggestions of good shops ( also the best place to buy a replacement speedometer cable for my 82 ‘Vette ) would be greatly appreciated.
Last edited by AttyVette; Nov 13, 2017 at 09:31 PM.
Le Mans Master
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
have you thought about fixing it your self?Its not a hard project.If you feel its best left to a pro ,then most auto shops can handle a cable replacement.i buy a lot of my parts from rock auto.Or I would call Wilcox.
Le Mans Master
Joined: Oct 2006
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Ok I know nothing about repairing speedometers so I thought I would ask here on this thread—does anyone on this site know of a good repair shop in Jefferson County Texas area, that can work on an 82 Corvette speedometer? When driving my 82’ Vette, the speedometer needle would frequently bounce around before it settled down while I was driving the car. Now, however, the last time I drove it (after taking it to a car show), it won’t register any speed at all. I am guessing that the cable broke but I am not sure where to take it for the repair. Any suggestions of good shops ( also the best place to buy a replacement speedometer cable for my 82 ‘Vette ) would be greatly appreciated.
Team Owner
Joined: Jun 2001
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From: Virginia USA
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
Agree. Same here. 2.7something to 3.55 rear end, and stock 255/60/15 but shop drove car and checked speed to ensure right gear driver.