Why does my speedometer bounce at 45 miles per hour?

For years now once the speedometer hits 45 miles per hour it begins bouncing and does not register correctly. Does anyone have a link or explanation on how I can take this apart and fix the problem?

Why is the speedometer bouncing on my Caprice?

The lighting, background building, the feeling of the 70’s and of course, the beautiful looking ’78 Caprice. More sharing options… In some cases it can be a build-up of dust, grime or dried out grease on the moving parts inside the speedometer. This is just an example and not your actual speedometer head. Yours will be similar.

Why is the speedometer not working on my Ford PowerStroke?

About a month ago The #8 fuse blew, causing the speedometer to stop working along with the trans (VSS). I didn’t have time to look into it so I brought it to a shop. When I got it back the mech. said that he replaced the vehicle speed sensor and the fuse. ( $160.00, what a crook ).

What kind of noise does a speedometer make?

This noise should be similar to a scraping and ringing noise when it momentarily happens with each revolution of the speedometer cable. Each “touch” can make the speedometer needle jump.

For years now once the speedometer hits 45 miles per hour it begins bouncing and does not register correctly. Does anyone have a link or explanation on how I can take this apart and fix the problem?

What to do if speedometer needle jumps up and down?

Reach around behind the speedometer or remove the instrument cluster to gain access and disconnect the speedometer cable from the speedometer. Pull out the inner cable, clean and inspect it, coat it with light grease, or M/C cable lube and put it back together. That should cure it… The speedo cable for those old cars is like a spring.

How much does it cost to rebuild a speedometer?

Begin by cleaning and lubricating the cable, but you probably have a combination of issues. On average, a speedometer rebuild runs $150. If you can purchase a guaranteed speedo for less than that by all means do so. Just keep in mind that the old lubricants, even in an NOS unit, dry up over time. Sign up for a new account in our community.

What kind of wire is in a speedometer?

By this time, most cables were of a plastic nature with some metal wire reinforcement. Typically, the bushing in the back of the speedometer head is also plastic. It can deteriorate with time and mileage, too. Lubing it will only add more lube where it normally isn’t needed or desired.

What should the temperature be on a certified speedometer?

On “certified” speedometers (for law enforcement use vehicles), their calibration is specified to be + or – 1mph over the full speed range, IF the interior temperature is within a normal temperature range. It could well be a special clock spring which makes this close-calibration possible, as well as tighter quality control.

Is there a way to replace the speedometer cable?

Replacing the speedometer cable is one option, but there are two methods for lubricating the old cable that’s worth it to try first. For one method, they make a special speedometer cable lubricant that’s installed where the cable attaches to the speedometer head.

Are there any problems with the speedometer on a vintage car?

Fortunately, problems with mechanically operated speedometers can often be resolved with a little effort. Here we’ll talk about how they work and common problems on vintage automobiles.

Why does my speedometer make noise when I Disconnect the cable?

If you disconnect the cable from a speedometer head and it still makes noise, then you have just isolated the problem as the cable itself. However, if the noise disappears when it’s disconnected then the head contains the issue.

Can a bad speedometer sensor cause you to slow down?

A malfunctioning speedometer sensor can also cause a speedometer to act erratically, fluctuating the reading from one speed to another; even though in reality you’re not speeding up or slowing down.

When to see a mechanic about your speedometer?

If you feel you are driving faster or slower than what the speedometer reads, it is a good idea to have your vehicle inspected by Your Mechanic, as this might be a problem with the sensor that can be repaired or an indication that the speedometer sensor needs replacement.

Why does the needle bounce on the speedometer?

That should cure it… The speedo cable for those old cars is like a spring. If it hangs up somewhere due to poor lubrication when it releases there is pent up energy so it “over releases” and creates the needle bounce you see on the speedo. This is first a lubrication issue.

Why is my speedometer so far off the speed limit?

As mentioned above, another common problem is the calibration of the reading. Sometimes owners don’t find out just how far off a speedometer is until they’re driving down the highway at 55 MPH and receive a speeding ticket for traveling 10 MPH over the limit.

This noise should be similar to a scraping and ringing noise when it momentarily happens with each revolution of the speedometer cable. Each “touch” can make the speedometer needle jump.

Why does the needle on my speedometer jump?

While you are driving, if you notice the needle on the speedometer jumps erratically from one number to another, the speedometer cable is most likely damaged or the sensors on the driveshaft are not accurately sending the signal through the cable.

Where is the speedometer located on a car?

Where is the speedometer sensor located? The speedometer sensor is located in the transmission of your vehicle and is designed to register the driveshaft’s rotational speed. The sensor delivers this information through the speedometer cable and to the vehicle’s computer, which converts electrical pulses into a numerical speed.

What causes the needle on the speedometer to go up or down?

Scenario: while you are driving, your speedometer needle abruptly goes up by 10 miles per hour or more, then swings back down sharply. This continues the entire time you are driving, with the needle bouncing between different speeds even when you are drivin g steadily. The speedometer indicator gauge may come on if the car has one.

What are the symptoms of a bad speedometer sensor?

Symptoms of a Bad or Failing Speedometer Sensor. Cost of Replacing a Bad or Failing Speedometer Sensor. Common signs include the speedometer not working, cruise control not engaging, Check Engine Light coming on, and loss of power.

Why does my speedometer bounce all the time?

My trucks speedometer works smoothly up to 33 mph but then will start bouncing (more aggressively at higher speeds) from random points. I’ve read up and found that it’s often a VSS issue but my trucks cruise control works and will turn on just fine, but causes my speeds to change rapidly with the speedo bounce.

Can a bad speedometer sensor cause your car to lose power?

If you notice that your car starts to lose power; especially when you apply pressure to the throttle, this might be caused by a damaged or malfunctioning speedometer sensor. This problem could be potentially harmful to other mechanical components on your vehicle, so don’t ignore the issue.

How much time does speeding save in the car?

Normally Bob drives with the flow of traffic at 70 miles per hour. One day he is anxious and instead speeds at 80 mph. How much time does he save? How much time would he save at 90 mph?

How big is a 14 ” tire on a speedometer?

Speedometer Calibration Tire Size Chart for 14″ Wheels 19″ Tire Diameter 20″ Tire Diameter 21″ Tire Diameter 22″ Tire Diameter 23″ Tire Diameter 24″ Tire Diameter 25″ Tire Diameter 26″ Tire Diameter

Why does the speedometer read how many revolutions?

Your speedometer is reading how many revolutions your tires are making not how fast they are spinning. When you go to bigger tires the circumference of the tires is larger, meaning the distance around the tire is longer. Thus, with each revolution you are traveling further than before.

Why does my speedometer bounce at 45 miles per hour?