Throttle position sensor
Videos
A throttle position sensor is a sensor used to monitor the throttle body valve position for the ECU of an engine. The sensor is usually located on the butterfly spindle/shaft, so that it can directly
Throttle body showing throttle position sensor on the right
Potentiometric type sensor, showing the multi-finger metal brush/rake...
...and the resistive strips.
Automatic transmission
Videos
An automatic transmission or automatic gearbox is a multi-speed transmission used in motor vehicles that does not require any input from the driver other than throttle position to change forward gears
Cutaway view of a 2007 Toyota AA80E hydraulic automatic
Gear selector of a 1992 Ford Escort with automatic transmission
Cutaway view of a ZF 8HP transmission: torque converter on the left, planetary gearsets in the centre, control mechanisms at the bottom
Torque converter – cutaway view