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My speedometer works and the odometer does not because there is a plastic gear in the odometer that is broken.
If you open the odometer, there are two small plastic gears. One is connected to the speedometer, the other to the odometer. The speedometer gear drives the odometer gear. In all likelihood, one of these gears is missing a few teeth. I have the same problem with my Ramcharger, same year.
Your speedometer may have failed, or the speedometer cable that connects to the transmission, or the plastic gear in the transmission may be broken.
not quit positive
If the odometer is not working but the speedometer is still indicating speed, the most likely fault is a set of small plastic gears inside the speedometer instrument itself. I have seen these gears available for sale at various BMW parts specialists. Removing the dash cluster for access to the speedometer is not difficult in a 1987 E30 car. With the cluster on the bench, you can repair the speedometer gears or replace the whole thing. Used speedometers are plentiful at on-line auction sites such as eBay.
== == It is plastic gear driven. There is no cable as in earlier vehicles. Although the output shaft in the transmission still operates the speedometer and odometer, the plastic gear drives a sensor that is plugged into the wiring harness. On the other end, it's included in one of two large connectors that attach to the back of the instrument cluster. No cables!
The odometer has failed. Unfortunately, there isn't realy any troubleshooting involved. The speedometer and the odometer run off the same input. In a nutshell the above is correct, because to fix it you have to replace it. I own a 1997 Mazda B4000, except for cosmetics....same truck. Found the answer myself today...in the instrument panel there are 3 clusters....the cluster with the tack, spedometer, odometer and trip odometer is where your issue lies....there is a plastic gear that wears out inside...be advised their is a great deal of labor involved in this project....I highly suggest a proffessional do this for you...also due to it being a plastic part, I would rather buy a new part from the dealer than take my chances at the local yard were the part has been exposed to the elements for however long. Their may be other issues involved, but his was my experience
Check the fuse in the fuse box; Also check to see if your speedometer cable snapped, this will cause the odometer to stop working as well If your speedometer is still working and just the odometer has stopped, the most likely problem is a little plastic drive gear in the instrument cluster. This is the most common problem with many makes of cars. If you are handy you can buy a replacement gear on Ebay for a few dollars and replace it yourself. Otherwise take the vehicle to an instrument repair shop. This problem usually occurs if you reset your odometer while travelling, it breaks a tooth off the little gear.
No. The tip that goes into the speedometer is broken off. Looks like plastic.
speedometer gear
the plastic gear in the cluster that drives the odometer and the tripmeter is probly broken ..
There is a tiny gear in the odometer itself which is plastic and only lasts about ten years or less.