Service Intervals

Check transmission fluid level in Truck and Van models at each engine oil change. Change transmission fluid and filter at 100,000 mile intervals on vehicles in normal use. On all models, if vehicle is used in severe service conditions (commercial use, trailer pulling, constant stop and go city traffic), change fluid and filter every 15,000 miles. Adjust intermediate (front) band of THM 250C transmission every 60,000 miles, or as required.