Service Intervals: 1998

Check fluid level at every engine oil change. Filter change and band adjustments are not required under normal operation. Under normal service, change fluid at 30,000-mile intervals on AX4N, AX4S, 4R70W and 4R100 transmissions. See APPLICATION  table for transmission application. If vehicle is operated under following conditions, replace transmission fluid every 21,000 miles on 4R70W and 4R100 transmissions or 30,000 miles on AX4N and AX4S transmissions.

• In hot weather with temperature greater than 90°F (32°C), carrying heavy loads and/or in hilly terrain.
• Towing a trailer or using a car top carrier.
• In police, taxi or door-to-door delivery service.