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post #1 of 4 (permalink) Old 09-28-08, 05:01 PM Thread Starter
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Speedometer malfunction / tranny doesn't change gears

Hi guys I'm new to this forum and really need help. The speedometer on my 87 taurus stops working after a few minutes of driving and almost at the same time my gears stop changing. Someone told me it was a senor causing the same problem. Does anyone know what is the name of the sensor and also where is it located so I can do it myself
thanks

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post #2 of 4 (permalink) Old 09-28-08, 07:01 PM
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cool Re: Speedometer malfunction / tranny doesn't change gears

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Originally Posted by gatrus View Post
Hi guys I'm new to this forum and really need help. The speedometer on my 87 taurus stops working after a few minutes of driving and almost at the same time my gears stop changing. Someone told me it was a senor causing the same problem. Does anyone know what is the name of the sensor and also where is it located so I can do it myself
thanks
Sounds like a bad VSS to me. The magnetic shaft inside of the sensor breaks causing no signal to the PCM, and breaking the link to the speedometer cable so the speedometer won't work. You can see it by looking down in back of the engine, primarily from the left side.

Here is a picture. Ignore the X through the speedo cable and the note about the electronic cluster. You don't have an electronic cluster. Note- you didn't mention if this was a 3.0L V6. This is geared around that engine, but the 2.5L I4 was also used, which has a different trans. and sensor.


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post #3 of 4 (permalink) Old 09-28-08, 08:41 PM Thread Starter
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Re: Speedometer malfunction / tranny doesn't change gears

Thanks tbird100636, for the reply, its a 3 liter engine. Do you think I can do it myself?
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post #4 of 4 (permalink) Old 09-29-08, 09:13 PM
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cool Re: Speedometer malfunction / tranny doesn't change gears

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Thanks tbird100636, for the reply, its a 3 liter engine. Do you think I can do it myself?
Yes. With the engine cold reach down behind and below the engine. Disconnect the electrical connector, the speedo. cable just pulls out, remove the bolt and it slides out. If the new VSS comes with a gear check the color and tooth count. If not the same or no gear is found reove the geat from the old sensor by removing the clip and sliding it off. Installation is reverse of removal. Make sure to push the cable in until it clicks.

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