1996 Buick Regal Owner's Manual - Page 239

Automatic Transaxle Fluid When to Check and Change Operating the enginewith the air cleaner off can cause youor others to burned. The air be cleaner not only cleans the air, it stops flame if If the engine backfires. it isn't there, and the engine backfires, you could be burned. Don't drive with it off, and be careful workingon the off. engine with the air cleaner L 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 one or more of these conditions: 0 In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher. In hilly or mountainous ten-ain. When doing frequent trailer towing. NOTICE: 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 do not require changing. If the air cleaner is off, a backfire can cause a damaging engine fire. And, dirt can easily get See "Scheduled Maintenance Services" i n the Index. into your engine, which damage it. Always will have the air cleaner in place when you're driving. 6-17