On four wheel drive vehicles, the transfer case contains gears that interface a subsequent drive shaft to send capacity to each of the four wheels rather than only the front or back ones. The exchange case on certain vehicles, especially those expected for rough terrain use, are locked in by a different stuff switch or electric buttons or a revolving switch on the dashboard. Most rough terrain 4WD vehicles have move case positions for back tire drive; 4WD High, for on-street activity; and 4WD Low, for rough terrain and requesting on-street use. All-wheel-drive vehicles frequently don’t have an exchange case switch or switch; all things considered, AWD draws in or separates naturally founded on driving circumstances. An exchange cases can send all the capacity to either the front or back when required.