Question about 1991 Volvo 740

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Hi, I have a volvo 740 made in belgium 1991 model. The speedomete spent a few months fluctuating wildly, sometimes working well, sometimes not at all, sometimes stuck on 140 km per hour. The odometer seemed to work when the speedometer was working. Since compulsory vehicle inspection is coming up, I pulled the whole instrument panel apart looking for loose wires etc and now it is all put together again I find that the odometer is working, but not the speedo. This seems to suggest that the diff sensor and the wiring is ok, but there is trouble in the speedo. I would greatly appreciate any ideas All the best and happy new year, Jeffrey

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How wold i fix a speedometer

Posted on Feb 27, 2013

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Are you shure that's all electrical? Check if you have a flex shaft; Renault have a flex shaft to the odo, and then have a electrical sensor.
The simptom seems to you have a bent or a grip in the flex shaft (if you have any, of course)

Posted on Jan 01, 2013

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There should be a speedo sensor on the transmission somewhere. I don't know exactly where it is located. I believe your speedo is all electrical so the sensor on the transmission sends a signal to the speedo head. You can go onto some parts stores websites and see if one is listed for it, if it is, I would try replacing that first. I don't think the part should be more then $50 or $60 but you never know with Volvo. Good luck.

Posted on Jan 02, 2011

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