50000 MI or 80000 KM

Check
    Drive/Propeller Shaft
      At approximately every 50,000 miles/80,000 km or 4 years, check the drive shaft flex discs.
Tighten/Torque
    Steering Gear
      At approximately every 50,000 miles/80,000 km or 4 years, retighten bolts for steering box. Observe torque.