1996 Pontiac Trans Sport Owner's Manual - Page 271

Checking or Replacing the Air Cleaner Automatic Transaxle Fluid 1 When to Check and Change A good time to check your automatic transaxle fluid level is when the engine oil is changed. Change both the fluid and filter every 50,000 miles (83 000 km) if the vehicle is mainlydriven under one or more of these conditions: In heavy city traffic where the outside temperature regularly reaches 90"F (32"C) or higher. 0 In hilly or mountainous terrain. When doing frequent trailer towing. 0 1. Loosen the four wing nuts. 2. Pull thetop of the air cleanertoward the front of the vehicle and remove the air cleaner filter. 3. Be sure to installthe air cleaner filter, replace the cover and tighten the wing nuts securely. Uses such as found in taxi, police or delivery service. If you do not use yourvehicle under any of these conditions, the fluid and filter do not require changing. See "Scheduled Maintenance Services" in the Index. 6-15