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Service Intervals & Specifications: Notes

REPLACEMENT INTERVALS (1)

Component Months Miles
Air Filter
Normal Service 24 30,000
Severe Service (2) (3) 15,000
Automatic Transmission Band Adjustment
3.9L & 5.9L
Normal Service (2) 100,000
Severe Service (2) 30,000
Automatic Transmission Fluid & Filter
Normal Service (2) 100,000
Severe Service (2) 30,000
Coolant
Normal Service (4) (4)
Severe Service (2) 100,000
Drive Belt
Normal Service
3.9L & 5.9L 60 (5) 60,000
4.7L 90 (5) 90,000
Severe Service
3.9L & 5.9L (2) (5) 60,000
4.7L (2) (5) 90,000
Engine Oil & Oil Filter
Normal Service 6 6000
Severe Service (2) 3000
Front Differential Fluid (4WD)
Normal Service (6) (6)
Severe Service (2) 12,000
Manual Transmission Fluid (7)
PCV Valve (8)
Normal Service 48 60,000
Severe Service (2) 30,000
Rear Differential Fluid
Normal Service (6) (6)
Severe Service (2) 12,000
Spark Plugs
Normal Service 30 30,000
Severe Service (2) 30,000
Spark Plug Wires
3.9L & 5.9L
Normal Service 60 60,000
Severe Service (2) 60,000
4.7L (9) (9)
Transfer Case Fluid (4WD)
Normal Service 30 30,000
Severe Service (7) (7)
(1) Different interval may be required for normal and severe service. Severe service is described as long periods of engine idling, frequent short trip operation of less than 5 miles, trailer towing, off-highway operation, snow removal operation, or operating in dusty or excessively hot conditions.
(2) Monthly interval does not apply.
(3) Inspect air filter every 15,000 miles and replace as necessary. Replace at 30,000 miles unless previously replaced during inspection.
(4) Replace coolant at 60 months regardless of mileage.
(5) Inspect and adjust belt tension during every 30 months or 30,000 miles, replace if required.
(6) Normal service interval is not available from manufacturer. Manufacturer lists service schedule only under severe service conditions.
(7) Manufacturer does not specify a service interval.
(8) Inspect PCV valve and replace as necessary. This service is recommended by manufacturer and is not required to maintain emissions warranty.
(9) Engine does not use spark plug wires.
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