Here's a breakdown of the process and the challenges:
Difficulty Factors:
* Access: Getting to the seal requires dropping the transmission's oil pan, and potentially the torque converter, or even partially dropping the transmission itself depending on the exact design. This involves disconnecting various components.
* Torque Converter: Removing and reinstalling the torque converter requires special tools and care to prevent damage. If not done correctly, it could lead to transmission failure.
* Fluid Management: You'll need to drain the transmission fluid, and managing the fluid during the process is crucial to avoid spills and contamination. Using the right type of transmission fluid is also vital.
* Alignment: Getting the transmission back in place accurately and properly aligning the torque converter requires precision.
General Steps (This is NOT a detailed instruction manual):
1. Safety First: Disconnect the battery's negative terminal.
2. Fluid Drain: Drain the transmission fluid completely.
3. Access the Transmission: This might involve removing components like the exhaust system or even the driveshaft (consult a repair manual for your specific model year).
4. Drop the Transmission Pan (Likely): Remove the transmission pan to access the seal. Replace the pan gasket.
5. Possible Torque Converter Removal: Depending on the design, you might need to remove the torque converter.
6. Seal Removal: Carefully remove the old seal, taking note of its orientation. Use the correct seal removal tool to prevent damage to the transmission housing.
7. Seal Installation: Install the new seal using the correct installation tool (usually a socket or specific tool) to ensure it seats properly. Avoid damaging the new seal.
8. Reassembly: Reinstall the torque converter (if removed), the transmission pan, and all other components removed during the process. Be meticulous and ensure everything is properly aligned.
9. Refill Transmission Fluid: Refill the transmission with the correct type and amount of fluid.
10. Test: Start the engine and check for leaks. Test drive the vehicle carefully.
Tools You'll Need (minimum):
* Transmission jack (highly recommended)
* Socket set, wrenches
* Torque wrench
* Seal puller and installer
* Drain pan
* New transmission seal
* New transmission pan gasket
* New transmission fluid (correct type for your vehicle)
* Shop rags
* Repair manual specific to your Pontiac Transport's year and engine
Recommendation:
Unless you have significant mechanical experience working on transmissions, this is a job best left to a professional. Improperly reinstalling the torque converter or damaging the transmission housing can lead to costly repairs or even complete transmission failure. A repair manual specific to your year and model Pontiac Transport is essential for detailed instructions. Look for a Haynes or Chilton manual, or consult online resources like YouTube videos (use caution, and verify the video is relevant to your specific model).
