What is the Speedometer Cable all about?

The speedometer cable, which is connected to the speedometer in the dash and runs through the gearbox, follows a curved route and should have few or no bends or kinks especially in the ends. The cable, powered by the drive shaft, turns a magnet that creates an eddy current. The circular current rotates the speed cup, which tightens the hair spring. As the hairspring tightens, a pointer on the dial turns and indicates the speed. A faulty or broken speedometer cable causes the vehicle’s speedometer to register the wrong speed or stop functioning entirely.

Keep in mind:

• Other problem areas may cause the speedometer to function improperly.
• You should have our expert mechanics inspect all speedometer-related elements such as the sensor and drive.

How it's done:

• The vehicle battery is disconnected then the vehicle is lifted and supported on jack stands. Accessories are removed to access the cable inside and out as required.
• The defective speedometer cable is removed from the speedometer and the transmission.
• The new speedometer cable is installed and connected to the transmission and speedometer.
• All the removed accessories are reinstalled. The vehicle is removed from jack stands and the battery is reconnected.
• The vehicle is road tested to ensure proper operation of the speedometer.

Our recommendation:

There are many potential causes of a faulty speedometer cable. A thorough check of all speedometer-related components is necessary to determine the problem’s source. When checking the speedometer cable, our expert mechanics will inspect the routing of the cable, detect any damage such as fraying or kinking, and test the connections on both ends. If the cable is frayed or kinked it will need to be replaced and if gearbox oil has seeped into the cable and made its way to the speedometer the speedometer will need to be replaced. Broken drives, faulty speedometer sensors, and deterioration of the cable’s ends are all common reasons for cable malfunctioning. No matter the problem, our expert mechanics will perform a diagnostic check on the vehicle to pinpoint the exact source of speedometer-related troubles.

What common symptoms indicate you may need to replace the Speedometer Cable?

• Speedometer needle drops repeatedly while driving at slow speeds
• Speedometer needle vibrates or behaves erratically at high speeds
• Speedometer squeaks and squeals at high speeds
• Check Engine Light indicates a faulty speedometer sensor

How important is this service?

Ignoring a faulty speedometer cable can cause the speedometer to behave erratically or stop functioning completely over time. Contact our expert mechanics when you first notice problems with the speedometer cable to prevent further problems, such as receiving costly tickets because of inaccurate speedometer readings.