Autometer Jeep 52.4mm Short Sweep Electronic 100-250 Def F Transfer Case Temperature GaugeHigh transfer case temps mean the difference between having 4WD and not having 4WD. Monitoring this critical parameter ensures that your cooling system is performing properly and your transfer case will continue to transfer the power to all of the drivetrain. Highly accurate and durable thanks to AutoMeter? s patented air core meter movement, a single wire, 1 8? NPT temperature sender is included.