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Automatic Transmission Severe Service Defined
SEVERE SERVICE CONDITIONS DEFINEDChange the automatic transmission/transaxle fluid and filter if the vehicle is mainly driven under one or more of these conditions:
^ In heavy traffic where the outside temperature regularly reaches 32° C (90° F) or higher.
^ In hilly or mountainous terrain.
^ When doing frequent trailer towing.
^ Uses such as found in taxi, police or delivery service.