Question about 1987 Volvo 740

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My 1987 Volvo 740 has a speedometer needle that sticks and sometimes falls short of properly measuring the speed at which I am traveling. I have a feeling the cable could use a cleaning and lubrication. Do you have any suggestions?

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It needs a new speedometer. a dry cable would cause the needle to jump high when it sticks then unwinds.

Posted on May 29, 2010

  • hot88vette Dec 24, 2010

    my 740 wagon has a sensor on the rear axle that drives the speedometer, check the wiring

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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.

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