Symbol 2599 from ISO 7000 - Title/Meaning: Differential lock, one drive axle 
Function/description: To identify the control or indicator associated with the axle differential system that controls traction power. When used as an indicator, it signals that the system is locked and both the right and left wheels deliver traction power, but also that turning maneuvers on high friction surfaces can result in reduced performance or vehicle damage.
Own work using: iso.org/obp/graphics/grs/15afaafb-260a-4f3b-b863-a50e6f093cb6 200.png
Vectorization:  Mrmw