1994 Volvo 850. Speedometer works fine up to 49 mph and no higher. Slowing down to less than 49 and it works again. Had the cluster out and the needle moves freely. Odometer and tach work fine (replaced the odometer gear not long ago and speedometer worked fine for several months... any ideas?

SOURCE: odometer does not work

This is a common problem with all models of volvo, with the non digital odometer  pre 1998,, there is a tiny nylon gear deep inside the odometer that needs to be replaced. Your dealer will not fix it, but will put in a new one for you as the cost of fixing in labour is more than a new one,, My solution is much cheeper,, I have
many low milage VOLVO odometer/instr clusters, a few hi'r km 1s


ODOMETERS FROM 1987-PRESENT
I have many pre 1998 Volvo instrument clusters, most with Very low milage, almost all in Km, I have most models of Volvo.

at these prices IT'S A GOOD IDEA TO HAVE AN EXTRA ONE , comes with detailed instructions -with pictures-on how to remove your old one and re-install

just for example
I have 4,, 1994-1997 850/s70/v70 /c70turbo with less than 10,000 km
2 1994-1997 850/s70/v70/c70 non turbo with less than 10,000 km
1 1990 740 -940 turbo with less than 4.000 kms

I also have many Volvo instrument clusters from 1987 to PRESENT with varied milage,,let me know what year and model and milage you are looking for,, I will have something close

WILL SHIP ANYWHERE IN N.AMERICA

SOURCE: how do I change out a non working odometer/trip meter?

This has been a problem with VOLVO especially the 850 models what happens is the plastic senssor inside the speedometer breaks off and it will tell you the road speed but ODOMETER AND TRIP METER will not work and the only way to fix it is to take the cluster out and sometimes it can be soldered back in place or get a used cluster and replace the unit sorry but it is not a simple fix

SOURCE: Odometer & trip meter stopped working.

Hello, We had the same problem about a year ago: 1996 Volvo 850 20V 2.5 L. We turned the ignition switch several times, and all the gauges was came back. I think the ignition switch cause the problem. We haven't had this problem since than.

SOURCE: My Volvo 94 850 odometer stop working, I bought

There are actually two gears that you need to replace, a large one and then smaller one that rides inside it. You can purchase them both at www.fcpgroton.com These can also sometimes affect the operation of your speedometer. Do you by chance have an ABS and TRACS light on? If so the speedometer issue may be related to your ABS controller.

SOURCE: 1995 volvo 850 turbo speedometer is working odometer is not.

You have a broken odometer gear wheel which is very delicate and hard to change it cost less than fifty bucks but it will take a volvo expert one hour or more to change if your not volvo acquinted dont attempt to fix it.you will mess the dash board