Service Intervals

It is not necessary to check the transmission fluid level. A transmission fluid leak is the only reason for fluid loss. Transmission fluid should not be changed under normal operating conditions. Under continuous extreme operating conditions (trailer towing, heavy city traffic with ambient temperature more than 90°F (32°C) or delivery service), replace fluid and filter every 50,000 miles. If transmission is not used under any of these conditions, the fluid and filter do not require changing.