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the speedometer switch is located at the rear of the diferential, remove wires clean and refit, that should cure it.
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.
Smaller tires should not cause the check engine light to come on. Smaller tires will cause the speedometer to be off.
sounds like a broken speedometer cable.
there is a sensor in one of the drive shaft that finds the speed it could either be that or the engine computer is failing
Nope, bet it was the other way around... Your speedometer stopped working and your check engine light came on. A broken speedometer (don't know what car so I can't pinpoint it) will cause a whole bunch of codes.
TCM Malfunction, And/Or Speedometer Sensor Malfunction.
The gears in the speedometer are stripped. If the odometer is working then you have input.
If it's an electronic (analog) speedometer needle, you probably have a problem with the dasboard grounding.
There is no speedometer cable on a 1995 caravan. it is done by a speed sensor on the transmission and digtal data is sent to the computer and the computer then sends the signal to the speedometer. This is the case even when the speedometer looks analog. Likely a bad speedometer is the cause if it does not move as the speed sensor is used for other functions and would trip the "check engine" light if it was bad. the speedometer is part of the instrument cluster and likely you would need to change the whole thing.
i would have to bet on the speed sensor
Have electronic vehicle speed sensor in transmission checked out. It will cause loss of speedometer function and set a fault code(check engine light).