1999 Chevrolet Corvette Owner's Manual - Page 269

yellowblue Change both the fluid and filter every 50,000 miles (80 000 km) if the vehicle is mainly driven under one of these conditions: How to Check Because this operation can be difficult, you may choose to have this done at your Chevrolet dealership Service Department. If you do it yourself, be sure to follow all the instructions here, or you could get a false reading. D In heavy city traffic where the outside temperature regularly reaches 90_F (32_C) or higher. D In hilly or mountainous terrain. D High performance operation. If you do not use your vehicle under one of these conditions, change the fluid and filter every 100,000 miles (166 000 km). See "Scheduled Maintenance Services" in the Index for the proper service intervals for the transmission fluid and filter. NOTICE: Too much or too little fluid can damage your transmission. Too much can mean that some of the fluid could come out and fall on hot exhaust system parts, starting a fire. Be sure to get an accurate reading if you check your transmission fluid. Check the fluid level only when your engine is off, the vehicle is parked on a level place and the transmission is cool enough for you to rest your fingers on the transmission case. Manual Transmission Fluid When to Check A good time to have it checked is when the engine oil is changed. However, the fluid in your manual transmission doesn't require changing. 6-19