Service Intervals: Transmission

Check transmission fluid level at each engine oil change. On vehicles under 8500 Gross Vehicle Weight Rating (GVWR), change transmission fluid and filter at 30,000 mile intervals. On vehicles over 8500 GVWR, change transmission fluid and filter at 24,000 miles.

If vehicle is used in severe service conditions (commercial use, trailer pulling, constant stop-and-go driving), change fluid and filter every 15,000 miles on vehicles under 8500 GVWR and at 12,000 miles on vehicles over 8500 GVWR.