the LACK of LUBE or Graphte on the speed0 cable IF it's not an electric sending unit type. The speedo cable spins inside another cable. Moisture will cause rust after a few years and this will cause the speedo cable to start to drag and release. If you remove the cable from the back of the instrument cluster and squirt in some graphite, this should help with the bouncing.
I had the same issue with my 93 ford tempo, it turned out to be a governer gear in the tansmission that would cause it to spike the speedometer. If you get it looked at quick you will save lots of cash.
Possibly your speed sensor. My speedometer would bounce around & then soon after it felt like my transmission was slipping. Turns out the speed sensor controls the upshift in your transmission.
got the same exact problem.
sounds like a broken speedometer cable.
If it is the same problem that appeared on my '04, it is going to be the instrument cluster. The speedometer is part of it and couldn't be changed independently. Mine started bouncing some when I would first start it up, then start working normal. I ignored that for a while. Then it got to where it would not move at all till I had driven some , then it would start working right. It finally got where it wouldn't move at all or just peg out. I had the cluster changed and that fixed it.
If it's an electronic (analog) speedometer needle, you probably have a problem with the dasboard grounding.
The gears in the speedometer are stripped. If the odometer is working then you have input.
TCM Malfunction, And/Or Speedometer Sensor Malfunction.
i would have to bet on the speed sensor
The speedometer on a 1996 Honda Accord EX is the pulse variety. It is likely that the teeth on the speedometer gear are not meshing properly.
If it works then all of a sudden it starts bouncing back and forth its your Vehicle speed sensor. NAPA part number Echlin VSS318 for a 98 Taurus. It's a little tough to access but achievable.
If the speedometer continues to work - probably a broken gear etc. in speedometer head and probably will have to be replaced. If speedometer does not work -- probably a broken speedometer cable
Sounds like a grenaded transmission
a wire could have came loose
the speedometer switch is located at the rear of the diferential, remove wires clean and refit, that should cure it.
It is possible that the speedometer on a 1997 Plymouth will only work intermittently because the gear is worn out. Sometimes dirt can get up into the area where the speedometer cable is housed and cause excessive wear to the gear.
The wires for the fog lights and speedometer are probably rubbing together somewhere behind the dash, the insulation is most likely worn on both the wires. I t will cause a short if it continues. Check the wires for worn insulation.
Check the fuses near the drivers left foot
a dead battery
The speedometer cable (which runs from the transmission to the dashboard) has snapped. This is a two-piece cable, and the one-piece cable in later Proteges will not work. I had the transmission replaced, and the cable could never be fit in properly. This is a mechanical speedometer, so you would have to change the entire speedometer part of the instrument panel to use a magnetic/electronic speedometer.
Having the speedometer jump and the engine stall in the 1994 Jeep Grand Cherokee Laredo could be a problem with the idle and the transmission. The transmission slipping can cause the speedometer to jump.
Fixing it depends on what the speedometer is doing. Chances are its making a funny noise and the needle is bouncing around. This would be due to a damaged or unlubricated speedometer cable. It is a cable that spins around in a plastic sheath connected to the back or your speedometer and to your transmission. Often times removing it and filling it with graphite powder will solve the problem. If its severely damaged you can replace it with a new one. If the cable isn't the problem you may have to replace the speedometer itself.
why would a speedometer and odometer not work on a suzuki motorcycle?
They would be shorter and that would affect speedometer accuracy.They would be shorter and that would affect speedometer accuracy.