PIN AS 4869422 - Caterpillar

Downshifting
If the ground speed is reduced or if the engine speed is reduced by an increased load, the transmission will automatically downshift to select the correct transmission speed.
The transmission is equipped with a downshift inhibitor. The transmission will not necessarily downshift when the transmission control is moved. This protects against engine overspeed.Accidental downshifting of the transmission control does not mean forced or immediate shifting of the transmission.
As the machine slows, the transmission will automatically downshift to match operating conditions. Move transmission control (5) to the NEUTRAL position if you intend to stop the machine.Shift Inhibiting
A shift from any FORWARD gear into NEUTRAL position is inhibited when the machine is traveling at a speed greater than 5.6 km/h (3.5 mph).Normal Shifting
An automatic downshift will occur