Not sure where it is; but the speed sensor, on the earlier 900 Ranger is subject to a Technical Service Bulletin R-13-04. If the dealer doesn't have it when you pick it up, and you later have a problem, a quick bandaid put it in low gear and drive at 4000 rpm for 30 seconds it will reset it and work fine it's not a permanent fix but will get you home.
A link to enter your VIN to determine what TSB's apply to your Ranger has been removed from the public section of the Polaris website; but a call to your dealer with your VIN should give you the information you need.
A link to enter your VIN to determine what TSB's apply to your Ranger has been removed from the public section of the Polaris website; but a call to your dealer with your VIN should give you the information you need.