Speedometer intermittent

G

Gil Cleeton

I have bought a 99 Legacy to partner my 96 Legacy, but its speedometer is
intermittent. Sometimes it stays at zero then springs into action.
What are likely causes and treatments (and procedure) please?
 
I've replaced the Speed Sensor today (I assumed it was the unit over the
crankshaft pulley?) but it's made no difference?
 
No it isn't - which and where is the sensor that governs the speedometer
please?
 
Is yours mechanical or electronic? The mechanical speedometers usually have
a cable that ties in to the transmission. There is usually a gear in there
that you can change if you change tire sizes and need to adjust the
speedometer. I'm not sure how the electronic ones work, I haven't owned one
like that.

The last time I had an erratic speedometer was a few days before the cable
snapped.
 
If you search the archives, you'll find more info. I also have a 99
OBW with the same problem. My dealer diagnosed it as needing a new
sending unit. Parts and labor (including certified resetting of the
odometer so the title indicates actual mileage) will cost about $300.
Others on the NG has gotten similar estimates.

Once my speedo warms up on the highway, no problem. So, I'm going to
live with it for awhile.
 
Again, documentation gets in the way of progress. But, it's consumer
protection. Which leads to the question: does your odo portion work,
or is it just the speedo that's sick?
 
generally the electronic VSS is picked up from the front differential on subies.
 
The sending unit is in the speedo/odo gauge itself. When my speedo
doesn't work, my odo (and trip odo) doesn't work.
 

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