Check transmission operation in all gears (including reverse).
Automatic transmission
Check that the selector position indicator is working correctly in all modes.
Fully depress the accelerator pedal, check that the fully depressed accelerator pedal switch works.
Stop the vehicle on a steep slope. Set the box selector to position «R» and slowly release the brake pedal. Make sure to keep the vehicle on the slope in «R». If this does not happen, the transmission needs maintenance.