1996 Buick Regal Owner's Manual - Page 240

How to Check Because this operation can be a little difficult, you may choose to have this done at your Buick dealer Service Department. If you do it yourself, be sure to follow all the instructions here, or you could get a false reading on the dipstick. Wait at least 30 minutes before checking the transaxle fluid level if you have been driving: 0 0 When outside temperatures are above 90°F (32°C). At high speed for quite a while. In heavy traffic -- especially in hot weather. While pulling a trailer. 0 NOTICE: ~ ~ 1 I 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 mues (24 km) when outside temperatures areabove 50°F (10°C). If it's colder than 50°F (lO"C), you may have to drive longer. 1 Too much or too little fluid can damage your transaxle. Too much can mean that some of the on fluid could come out and fall hot engine parts or exhaust system parts, starting fire. Be sure to a get an accurate reading you check your if transaxle fluid.