An automatic transmission shift cable is a mechanical element that connects the gear lever on the steering column or center console to the transmission itself. It is used to transmit the driver’s command from the gear lever to the gear selector, which controls the operation of the gears.
Design and operating principle:
The automatic transmission shift cable usually consists of:
* Outer shell: Flexible shell that protects internal components.
* Inner cable: Steel or other high-strength cable that slides inside the sheath.
* Actuation mechanisms: This may be a system of levers or gears that connect an internal cable to the gear selector.
When the driver moves the gearshift lever, the inner cable moves within the shell, operating the drive mechanisms. These mechanisms then translate the movement of the cable into a mechanical signal, which is transmitted to the gearbox selector. The selector then controls the automatic transmission hydraulic system, which selects the appropriate gear.
Functions:
The automatic transmission shift cable performs the following functions:
* Transmitting the driver’s command from the gear lever to the gearbox.
* Ensure smooth and precise gear shifting.
* Connection of the gear lever with the gear selector, regardless of the distance between them.
Malfunctions:
One of the common problems with automatic transmission shift cables is stretching or damage to the internal cable, which leads to:
* Difficult or impossible gear shifting.
* Shifting gears at inappropriate times.
* Noise or vibration when shifting gears.