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Service Intervals & Specifications

REPLACEMENT INTERVALS (1)

Component Months Miles
Air Filter
Normal Service 24 30,000
Severe Service (2) 15,000
Automatic Transmission
Normal Service
Cherokee & Grand Cherokee 24 30,000
Wrangler 30 37,500
Severe Service (2) 12,000
Coolant (3) (3)
Drive Belt (4)
Normal Service
2.5L 24 30,000
4.0L & 4.7L 48 (5) 60,000
Severe Service
2.5L (2) 30,000
4.0L & 4.7L (2) (5) 45,000
Lubricate Steering Linkage
Normal Service 6 3000
Severe Service (2) 7500
Lubricate Steering & Suspension Ball Joints
Normal Service 12 15,000
Severe Service (2) 6000
Manual Transmission (6)
Normal Service 36 37,500
Severe Service (2) 36,000
Oil & Filter
Normal Service 6 7500
Severe Service (2) 3000
PCV Valve (4.7L) 48 (7) 60,000
Spark Plugs 24 30,000
Spark Plug Wires 48 60,000
Transfer Case 24 30,000
(1) Different interval may be required for normal and severe service. Severe service is described as frequent short trip driving (less than 5 miles), frequent driving in dusty conditions, extensive idling, trailer towing, sustained high speed operation, off road driving, desert operation, cold climate operation and commercial service.
(2) Monthly service interval does not apply.
(3) Replace coolant at 36 months, regardless of mileage, then replace every 24 months afterward.
(4) Inspect and/or replace as necessary. On 2.5L and 4.0L (except Grand Cherokee), adjust tension if necessary.
(5) After 45,000 or 60,000 mile inspection, check every 15,000 miles afterward.
(6) Service interval does not apply to Wrangler. Service interval for Wrangler is not available from manufacturer.
(7) Inspect and replace if necessary.
BELT ADJUSTMENT

Application Tension Lbs. (Kg)
Serpentine Belt (1)
New Belts (2) 180-200 (81.7-90.8)
Used Belts 140-160 (63.6-72.6)
(1) Grand Cherokee 4.0L and 4.7L engines are equipped with an automatic belt tensioner. DO NOT attempt to adjust belt tension.
(2) A belt is considered new if it has been used 15 minutes or less.
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