1998 Chevrolet Cavalier Owner's Manual - Page 276

Automatic Transaxle Fluid (Three-Speed Only) Operating the engine withthe air cleaner off can cause you or others to be burned. The air cleaner not only cleansthe air, it stops flame if the engine backfires. If it isn't there, and theengine backfires, you could be burned. Don't drive with it off, and be careful working onthe engine with the air cleaner off. When to Check and Change A good time to check your automatic transaxle fluid level is when the engine oil is changed. Change both the fluid and filter every 50,000 miles (83 000 km) if the vehicle is mainly driven under or one more of these conditions: In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher. In hilly or mountainous terrain. When doing frequent trailer towing. 0 NOTICE: If the air cleaner is off, a backfire can cause a damaging engine fire. And, can easily get dirt into your engine, which will damage it. Always have the air cleaner in place when you're driving. Uses such as found in taxi, police or delivery service. If you do not use your vehicle under any of these conditions, the fluid and filter not require changing. do See "Scheduled Maintenance Services'' in the Index. 6-18