The most often cited inventor of the first speedometer is Josip Belusic. A Croatian college professor and inventor, he developed it in 1888 and called it a velocimeter in his patent.
I think the modern speedometer was invented or perhaps perfected by John O'Brien, an engineer at the Waltham Watch Company in the 19 teens.
The Oldsmobile Curved Dash Runabout, released in 1901, was the first automobile line equipped with a mechanical speedometer.
oldsmobile 1901
To change the speedometer cable on a 1991 Chrysler New Yorker, first disconnect the negative battery cable and remove the dashboard panel to access the speedometer. Next, detach the old speedometer cable from the back of the speedometer and from the transmission. Install the new cable by connecting it to the transmission first, then to the speedometer, ensuring it is securely fastened. Finally, reassemble the dashboard and reconnect the battery.
To replace the speedometer cable on a 1988 Dodge Ram truck, first, disconnect the negative battery terminal for safety. Locate the speedometer cable at the back of the speedometer gauge and at the transmission; unscrew the retaining nut to detach the cable from both ends. Install the new speedometer cable by connecting it to the transmission first, then to the speedometer, ensuring it is securely fastened. Finally, reconnect the battery and test the speedometer for proper operation.
Broken speedometer cable?
If it's an analog speedometer, first check the condition of the speedometer cable. It may need to be replaced.
To fix the speedometer in a 1987 Pontiac Firebird, first check the speedometer cable for any damage or disconnection. If the cable is intact, inspect the speedometer head itself for issues. You may need to replace the speedometer cable or the speedometer unit if they are malfunctioning. Additionally, verify that the vehicle's gear ratio matches the speedometer's specifications for accurate readings.
To fix the speedometer on a 1978 Jeep CJ7, first check the speedometer cable for any damage or disconnection, as this is a common issue. If the cable is intact, inspect the speedometer head itself for any signs of malfunction or wear. You may need to remove the speedometer from the dashboard to clean or replace it. If the problem persists, consider replacing the speedometer cable or the speedometer unit entirely.
TCM Malfunction, And/Or Speedometer Sensor Malfunction.
To remove the speedometer from a 1974 Super Beetle, first, disconnect the negative battery cable for safety. Then, remove the dashboard cover and the screws securing the speedometer itself. Carefully disconnect the speedometer cable from the back of the speedometer, and then pull the speedometer out of the dashboard. Be sure to handle it gently to avoid damaging any components.
Speedometer?