Jeep 2004 Wrangler - Manual (Page 273)

‡Off-highway operation, trailer towing, taxi, limousine,
bus, snow plowing, or other types of commercial service
or prolonged operation with heavy loading, especially in hot weather, require front and rear axle service indicated
with a ‡ in Schedule “B”. Perform these services if the
vehicle is usually operated under these conditions.
SCHEDULE “B” 273
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