1995 Buick Riviera Owner's Manual - Page 228

Automatic Transaxle Fluid When to Check and Change A good time to check your automatic transaxle fluid changed. Refer to the level is when the engine oil is Maintenance Schedule to determine when to change your fluid. See "Scheduled Maintenance Services" in the Index. Wait at least 30 minutes before checking the transaxle fluid level if you have been driving: When outside temperatures are above 90°F (32"C). 0 At high speed for quite a while. In heavy traffic -- especially in hot weather. While pulling a trailer. How to Check Because this operation can be a little difficult, you may choose to have this done at your Buick dealer Service Department. To get the right reading, the fluid should be at normal operating temperature, which is 180°F to 200°F (82°C to 93°C). Get the vehicle warmed up by driving about 15 miles (24 k ) m when outside temperatures are above 50°F (10°C). If it's colder than 50°F (lO"C), you may have to drive longer. If you do it yourself, be sure to follow all the instructions here, or you could geta false reading on the dipstick. NOTICE: Too much or too little fluid can damage your transaxle. Too much can mean that some of the fluid could come out and fall on hot engine parts or exhaust system parts, starting a fire. Be sure to get an accurate reading if you check your transaxle fluid. 6-19