1994 Buick Roadmaster Owner's Manual - Page 239

Automatic Transmission Fluid When to Check and Change A good time to check yourautomatic transmission fluid level is when the engine oil is changed. Refer to the Maintenance Schedule to determine when to change your fluid. See "Scheduled Maintenance Services" in the Index. Wait at least 30 minutes before checking the transmission fluid level if you been driving: have 0 0 0 0 When outside temperatures are above 90°F (32°C). At high speed for quitea while. In heavy traffic -- especially in hot weather. While pulling a trailer. How to Check Because this operation can be little difficult, you may a choose to have this done at a Buick dealership Service Department. To get the right reading, the fluid should be normal at operating temperature, which is 180°F to 200°F (82°C to 93°C). If you do it yourself, be sure to follow all the instructions here, or you could getfalse reading on the a dipstick. To check transmission fluid Get the vehicle warmed hot: m when outside up by driving about 15 miles (24 k ) temperatures are above 50°F (10°C). If it's colder than 50 O (10" C), drivethe vehicle in"D' .(3rd Gear) until F the engine temperature gage moves and then remains steady for ten minutes.Then follow the hot check procedures. NOTICE: Too much or toolittle fluid can damage your transmission. Too much can mean that some of the fluid could come out and fall on hot engine parts or exhaust system, starting fire. Be sure a to get an accurate reading you check your if transmission fluid. 237