This process is further complicated because the 1999 Grand Am likely has either a 4-speed automatic or a 5-speed manual transmission, each requiring different procedures. You MUST know which transmission type you have before proceeding.
If you have a 4-speed automatic transmission:
This generally requires a drain and fill method, which only partially replaces the fluid. A complete flush is usually done by a professional with specialized equipment. Here's a general outline for the drain and fill:
1. Safety First: Consult your owner's manual for specific torque specifications and safety precautions. Work in a well-ventilated area and wear safety glasses and gloves. Support the vehicle securely on jack stands – never work under a vehicle supported only by a jack.
2. Warm up the transmission: Run the engine and let the transmission warm up to its normal operating temperature. This makes the fluid thinner and easier to drain.
3. Locate the drain pan and fill plug: Consult a repair manual specific to your 1999 Grand Am for the exact locations. These are usually on the bottom of the transmission.
4. Drain the fluid: Place a drain pan under the drain plug. Carefully remove the drain plug using the correct size socket and wrench. Allow the fluid to drain completely. Inspect the fluid for color and debris; this can give you an indication of the transmission's condition.
5. Replace the drain plug: Once drained, reinstall the drain plug and tighten it to the manufacturer's specified torque.
6. Locate the fill plug: Again, consult your repair manual.
7. Add new fluid: Using a funnel, add the correct type and amount of transmission fluid. Your owner's manual specifies the correct type and capacity. This is usually done by checking the fluid level through the fill hole with a dipstick (if equipped), or by adding fluid until it flows out of the fill hole.
8. Check the fluid level: Once the correct amount of fluid is added, check the fluid level. This might require starting the engine and letting it run for a few minutes.
9. Reinstall the fill plug: Tighten the fill plug to the manufacturer's specified torque.
If you have a 5-speed manual transmission:
Manual transmissions generally don't require regular fluid changes unless there's a problem. However, if a change is needed, it's typically done by removing the transmission to fully drain and refill the fluid. This is a significant undertaking and requires a high level of mechanical skill. It's strongly recommended to have a professional handle this task.
Important Notes:
* Repair Manual: A repair manual specific to your 1999 Pontiac Grand Am is essential. It will provide diagrams, torque specifications, and other crucial information.
* Fluid Type: Use ONLY the type of transmission fluid specified in your owner's manual. Using the wrong fluid can severely damage your transmission.
* Professional Help: If you're not confident in your abilities, take your Grand Am to a qualified mechanic. The cost of repair from a botched transmission fluid change far outweighs the cost of professional service.
This information is for guidance only and does not replace professional advice. Always consult your owner's manual and a repair manual before attempting any repairs.
