There is no point in changing it.
? The speedometer cable attaches to the transmission, not the engine. Please try again with more info.
Yes of why not...you should complete change your 12 valve 1300 cc engine to 16 valve 1300 cc EFI Engine for better performance and less fuel,GAS consumption.
Is it a 12 valve engine or 24 valve? What do you mean by speedometer sensor? Do you mean Vehicle speed sensor? If so why do you want to change that?
To change the speedometer cable on a Polaris XLT 650 snowmobile, first, remove the hood and locate the speedometer drive at the front of the engine. Disconnect the old cable by unscrewing it from the speedometer and the drive unit. Install the new cable by connecting it to the drive unit and the speedometer, ensuring it is routed properly without kinks. Finally, reassemble the hood and test the speedometer for proper function.
It should bury the speedometer depending on the gear ratio.
change the speed sensor and that should fix both of your problems
To change the speedometer from kilometers to miles per hour (mph) on a 2016 Dodge Caravan, turn on the ignition without starting the engine. Use the buttons on the steering wheel to navigate to the "Settings" menu on the instrument cluster display. Look for an option labeled "Units" or "Display" and select it to toggle between kilometers and miles. Confirm your choice, and the speedometer should now display mph.
the speedometer switch is located at the rear of the diferential, remove wires clean and refit, that should cure it.
To change the speedometer from kilometers to miles in a Mazda 3, turn on the ignition without starting the engine. Then, locate the "Menu" button on the dashboard or steering wheel and press it until you find "Settings." Navigate to the "Units" option and select "Miles" instead of "Kilometers." Confirm the change, and the speedometer will now display miles per hour.
To change the speedometer of a Mazda RX-8 from miles to kilometers, start by turning on the ignition without starting the engine. Then, press and hold the trip odometer reset button located on the instrument cluster. While holding the button, turn the ignition off and then back on, continuing to hold the button until the display changes from miles to kilometers. Release the button, and the speedometer should now reflect kilometers.
If memory serves me correctly the speedometer is driven by a gear which is on the transmission, looking down from the top of the engine (below the airbox) should be a 2 wire sensor which is screwed into the transmission case.
On your 1995 Ford Explorer you have a conventional speedometer cable driven speedometer , 1996 and newer Explorers have an electronic speedometer and a vehicle speed sensor according to my Haynes repair manual