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90 chevy full size 4 wd.speedometer needle moves up when start motor goes to different speeds then drops down to zero may go back up.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: INTERMITENT SPEEDOMETER MALFUNCTION, OK FOR

Likely one of the speed sensors on the trans,and depending on year of the vehicle,some of the 90's models had the Vehicle Speed Sensor (VSS) mounted on the transmission.

Posted on Aug 14, 2008

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  • 134 Answers

SOURCE: Speedometer Needle for Hyundai 2004 Accent

If your transmission fluid level is okay, then you need a new speedometer cable. Its not terribly difficult to replace, but it does require you to pull the instrument cluster. A local Hyundai dealership might be willing to photocopy the specific speedometer cable replacement instructions out of the 2004 Accent shop manual.

Posted on Apr 27, 2009

  • 19 Answers

SOURCE: speedometer needle fluctuates above 50 mph and

you probably need to replace the cable or the speedo

Posted on Nov 05, 2009

wireguy212
  • 1627 Answers

SOURCE: 2005 cavalier speedometer sticking at

You need to replace the sending unit ,speed senser,in the transmission housing or repair any shorted wireing comeing from it to the dash.

Posted on Nov 25, 2009

  • 1757 Answers

SOURCE: speedometer drops to zero while moving and then

The Vehicle Speed Sensor located on the Transmission is malfunctioning or the connection is malfunctioning.
It is very easily removed and replaced.
The Vehicle Speed Sensor sends vital information for the Transmission to properly Shift. Because yours is malfunctioning, this lack of information is causing shifting problems.
I do not know if you have a Mechanical or Electrical (Gauges or Digital) Instrument Display. I also do not know if you have a 17 or 19 bolt transmission pan, nor what type of transmission you have (AX4N or AX4S) Nor if you have a Speedometer Cable (Mechanical Instrument will have Gauges=Cable).
The best thing to do is to check the connections of the Vehicle Speed Sensor. Unplug and check both sides of the connection for corrosion/oxidation. You can also take this sensor out of the transmission and clean the interior end; reinstall and recheck operation.
If this does not fix the problem, then remove and replace this snsor.
Take the Sensor with you to the auto parts store to compare the part you receive. You should know what tansmission you have and the number of bolts on the transmission pan, and whether you have an Electronic (Digital) Instrument Panel or Mechanical (Gauges) Instrument Panel on your dash.
Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

Posted on Feb 17, 2010

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1 Answer

While driving, The speedometer needle sometimes doesn't move from zero.


IS this a Chevrolet? What year?

There is a known problem with the Instrument Clusters and you have to replace the Stepper Motors to get it to work correctly..

This is true for most Makes and Models but Especially in GM Products I will only rebuild a Cluster with a X27.168 Stepper Motor

Apr 15, 2013 | Cars & Trucks

1 Answer

1986 Alfa Romeo Spyder. WHen stopped, speedometer shows about 12 mph. At highway speed, it shows about 20 mph. Odomater seems fine.


Phylspilot, my 86 Spider never displayed less than 10 mph. If you look closely, you should see a tiny pin that the needle touches at about 10 mph. That prevents it from ever falling to zero. The needle will not move up until the speed exceeds 10. From my experience, that is normal. In your case, not displaying >20 is NOT normal.

The problem could be a few different things. Since the odometer appears to be working ok (I assume you checked that it racks up the miles at a rate commensurate with your approx speed), the speed needle may be sticking. I had the opposite problem with mine - speed needle okay, and odometer messed up.

I recommend pulling the speedometer housing out of the dash and checking to see if anything is causing the needle to bind. If it isn't, then check the fine spring where the needle is attached to ensure the spring is okay. You should be able to move the needle with your finger smoothly and have it return gently to the start position (in your case 12 mph).

This is a tricky operation. If you remove the needle from the stem, carefully place it back on the stem. Do this without moving the stem. Just reinsert the speed needle on the stem exactly at the small pin that holds the pin at about 10 mph.

Check the entire speedometer housing for cracks. Any crack could be enough to prevent proper operation. (That was the source of my odometer issue.)

Have fun putting it all back together.

Mar 20, 2013 | 1986 Alfa Romeo Spider

1 Answer

Speedometer not showing correct speed


Try this. Turn the key on, do not start the vehicle. Absence the needle on the speedo. It should move down and then back up. Before it moves back up turn off the key. Repeat this until the needle is at zero. Then start the vehicle. If the needle goes back to a spot other than zero, you may have to take it for a quick drive, than the speedo head is likely bad. This is a pretty common an known issue for gm's. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

Feb 02, 2012 | 2003 GMC Sierra 1500

1 Answer

Speedometer is at 50 MPH when stopped


Try this. Turn the key on, do not start the vehicle. Absence the needle on the speedo. It should move down and then back up. Before it moves back up turn off the key. Repeat this until the needle is at zero. Then start the vehicle. If the needle goes back to a spot other than zero, you may have to take it for a quick drive, than the speedo head is likely bad. This is a pretty common an known issue for gm's. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

Feb 02, 2012 | 2003 GMC Sierra 1500

1 Answer

Why does the tach and speedometer now spike when starting engine?


depends. newer vehicles do this just for effect, basically for you to go "ooooohhh" however with older vehicles ( pre 2006) this could be a code that the computer system is giving you, if the needle spikes all the way to the end of the speedometer/tachometer then back down to zero, its most likely effect. but if the needle spikes to 3 numbers (ex-90, 60, 30. then back to zero) its trying to tell you theres something wrong under the hood, could be as simple as a fuse or 02 sensor...

Sep 20, 2010 | 2001 Ford Escape

2 Answers

2005 Silverado 1500HD Speedometer not displaying correct speed


Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for Silverado instrument cluster repair

Dec 16, 2009 | 2005 Chevrolet Silverado 1500HD

1 Answer

Speedometer - 40MPH


the speedo is electronic, not cable, this problem is caused by a sticking stepper motor that moves the needle, a stepper motor is a miniature electric motor that can move and hold one position, this was a common problem at the dealer I worked at, u will need to pull the speedo and send it out for repair, I use the following link for this service.
http://www.dnaspeedometers.com/

Mar 23, 2009 | 1999 Ford Super Duty F 450

2 Answers

1997 Geo Metro speedometer and odometer do not work


Let me guess, it goes up to about 30, stays there, and if you go faster (past what would be the halfway point of your speedometer) it starts dropping below 30. It sounds like the type of speedometer that uses two magnetic cores at 90 degrees to each other, and one has gone out.

Troubleshooting and repair should be similar to this: http://www.fieros.de/en/articles/speedo.html

Oct 18, 2008 | 1997 Geo Metro

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