Designed to fit Paccar MX 11 and 13-liter engines, 38MT+™ Gear Reduction Starter includes built-in circuit breaker that protects against thermal damage and automatically resets operating temperature while eliminating need for wiring harness. Integral Magnet Switch minimizes voltage drop and gives solenoid maximum available voltage in any starting condition. For optimal reliability, electrical soft-start consistently and accurately engages pinion with ring gear.