At first 15,000 mi / 24,000 km or at first PM
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Drive Axle (SISU) - Axle Housing
• Change the oil in the differential carrier and the hubs, and clean the magnetic oil drain plugs. (Refer to Drive Axle (SISU) Oil
Servicing on page 264 for maintenance instructions.)
• Check the wheel bearing hubs and adjust if necessary. (Refer to Drive Axle (SISU) Inspection on page 264 for maintenance
instructions.)
• Visually inspect for damage or leaks. (Refer to Drive Axle (SISU) Inspection on page 264 for maintenance instructions.)
Rear Suspension - U-bolts
• Check the torque. Tighten to specified torque value as required. (Refer to Suspension U-Bolts, Grade 8 on page 280 for
maintenance instructions.)
Rear Suspension - Frame and Crossmember bolts
• Check the torque. Tighten to specified torque value as required. (Refer to Frame Fastener Torque Requirements on page 279
for maintenance instructions.)
Rear Suspension - Mounting Brackets and Fasteners
• Check the condition and the fastener torque. Tighten to the specified torque value as required; (Refer to Rear Axle and
Suspension on page 259 for maintenance instructions.)
Main and Auxiliary Transmission - Main and Auxiliary Transmission and Transfer Case
• Inspect for visible damage, signs of overheating, and leaks. (Refer to Transmission Maintenance on page 272 for maintenance
instructions.)
Main and Auxiliary Transmission - Main and Auxiliary Transmission (OFF HIGHWAY)
• Drain lubricant while warm. Flush each unit with clean flushing oil. (Refer to Transmission Maintenance on page 272 for
maintenance instructions.)
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Ensure that all maintenance intervals leading up to this point are repeated during this interval prior to the completion of
those listed here.
MAINTENANCE - At first 15,000 mi / 24,000 km or at first PM
174 Y53-6076-1D1 (09/20)
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