1997 Chevrolet Corvette Owner's Manual - Page 254

Change both the fluidand filter every 50,000 miles (80 000 km) if the vehicle is mainly driven under one of these conditions: In heavy city traffic where the outside temperature regularly reaches 90"F (32"C) orhigher. In hilly or mountainous terrain. 0 How to Check Because this operation can be difficult, you may choose to havethis done at your Chevrolet dealership Service Department. If you do ityourself, be sure to follow allthe instructions here, or you could get a false reading. High performance operation. If you do not use yourvehicle under one of these conditions, the fluid and filter donot require changing. See "Scheduled Maintenance Services" in the Index for the proper service intervals for the transmission fluid and filter. I NOTICE: 1 Manual Transmission Fluid When to Check A good time to have it checked is when the engine oil is changed. However, thefluid in your manual transmission doesn't require changing. 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. 6-19