1999 Subaru Impreza Owner's Manual - Page 279

Maintenance and service J Checking the fluid level when the fluid is hot Check the fluid level monthly. 1. Drive the vehicle several miles to raise the temperature of the transmission fluid up to normal operating temperature; 140 to 176°F (60 to 80 °C) is normal. 2. Park the vehicle on a level surface and set the parking brake. 3. First shift the selector lever in each position. Then shift it in the "P" position, and run the engine at idling speed. Upper level Lower level Upper level Lower level HGA007BB OM-H0207 4. Pull out the dipstick and check the fluid level on the gauge. If it is below the lower level on the "HOT" range, add the recommended automatic transmission fluid up to the upper level. J Checking the fluid level when the fluid is cold When the fluid level has to be checked without time to warm up the automatic transmission, check to see that the fluid level is between the lower level and upper level on the "COLD" range. If it is below that range, add fluid up to the upper level. Be careful not to overfill. J Recommended fluid "Dexron II" or "Dexron III" Type Automatic Transmission Fluid - CONTINUED - 10-23