Important Considerations:
* Type of Transmission: Determine if you have an automatic or manual transmission. This guide focuses on automatic transmissions, as manual transmission fluid changes are different.
* Fluid Type: Use the correct type and amount of transmission fluid specified in your owner's manual. Using the wrong fluid can severely damage your transmission. Dexron-II or Mercon ATF is likely, but check your manual.
* Safety First: Work in a well-ventilated area. Support the vehicle securely on jack stands, never rely solely on a jack. Wear safety glasses and gloves.
* Torque Wrench: A torque wrench is highly recommended to ensure you tighten bolts to the correct specification, preventing leaks and damage.
General Steps for an Automatic Transmission:
1. Prepare the Vehicle: Warm up the transmission by running the engine for 5-10 minutes. This helps thin the fluid for easier draining. Park on a level surface, engage the parking brake, and securely support the vehicle on jack stands.
2. Locate the Drain Plug: This is usually located on the bottom of the transmission pan. Position a drain pan underneath to catch the old fluid.
3. Drain the Fluid: Carefully remove the drain plug (it may be somewhat tight). Let the fluid drain completely. This could take quite a while. Inspect the old fluid for debris or unusual color (burnt fluid is a bad sign).
4. Remove the Transmission Pan: Once the fluid has drained, remove the transmission pan bolts. Have a large drain pan ready, as more fluid will spill out when you remove the pan. Be careful, as the pan may be heavy and contain some fluid.
5. Clean the Pan and Filter: Clean the transmission pan thoroughly, removing any debris. Most 1988 Chevy Celebrities have a filter built into the pan. This filter should be replaced. If it's a separate filter, replace that as well.
6. Replace the Pan Gasket: Replace the pan gasket with a new one. Many auto parts stores will have pan gasket kits that include the gasket and filter.
7. Reinstall the Transmission Pan: Carefully reinstall the transmission pan and tighten the bolts to the manufacturer's specified torque (check your manual).
8. Refill the Transmission: Locate the transmission fluid fill tube (usually on the side or top of the transmission). Use a funnel to slowly add the correct type and amount of transmission fluid as specified in your owner's manual. Check the fluid level with the dipstick, usually located near the fill tube. The fluid level should be within the specified range on the dipstick.
9. Run the Engine: Start the engine and let it run for a few minutes. Check the fluid level again and add more if necessary. You might need to do this a few times until the fluid reaches the proper level.
10. Check for Leaks: Carefully inspect the pan and surrounding areas for any leaks.
11. Dispose of Old Fluid Properly: Dispose of the old transmission fluid according to local regulations. Most auto parts stores will take used oil and transmission fluid.
Important Note: This is a simplified guide. There are variations between different transmission types. Always consult your owner's manual and possibly a repair manual specific to your 1988 Chevy Celebrity for detailed instructions, torque specifications, and fluid type. If you're not comfortable performing this task yourself, have a qualified mechanic do it. Improper transmission fluid changes can lead to significant transmission damage.
