Challenges:
* Limited Space: The firewall and other components severely restrict access. Your hands and tools will be cramped.
* Bolt Accessibility: The bolts' position often makes it difficult to get a socket or wrench on them effectively. They might be angled, rusted, or seized.
* Transmission Jack Necessity: You *must* have a transmission jack, and preferably one that's low-profile, to safely support the transmission's weight while you're working. Trying to do this without a jack is dangerous and could result in injury or damage.
* Potential for Damage: There's a high risk of scratching or damaging surrounding components.
Tools and Techniques:
1. Transmission Jack: As mentioned, this is crucial. Securely support the transmission.
2. Low-Profile Sockets and Wrenches: You'll likely need sockets and wrenches with a short profile to fit in the tight space. Ratcheting wrenches are helpful.
3. Extensions and U-Joints: Use extensions and universal joints (U-joints) on your ratchet or wrench to reach the bolts at awkward angles. A flexible head ratchet can be a lifesaver.
4. Penetrating Oil: Liberally apply penetrating oil (like PB Blaster or Liquid Wrench) to the bolts several hours or even overnight *before* you attempt to remove them. This will help loosen any rust or corrosion.
5. Impact Wrench (Optional but Recommended): An impact wrench can significantly improve your chances of removing stubborn bolts, especially if they're seized. However, use caution to avoid stripping the bolt heads. A smaller, lighter impact wrench is preferable for better maneuverability.
6. Wrench/Socket Size: Double-check your service manual for the exact size of the bolts. Using the wrong size can strip the bolt heads.
7. Protection: Cover surrounding components with towels or cardboard to prevent scratches.
8. Patience: This is a time-consuming and potentially frustrating job. Don't rush it. Take breaks if you get frustrated.
Step-by-Step (General Approach):
1. Disconnect the Driveshaft: This is essential for easier transmission removal. Consult your repair manual for specific instructions on your vehicle.
2. Support the Transmission: Securely position the transmission jack under the transmission.
3. Apply Penetrating Oil: Soak the bolts generously.
4. Attempt Removal: Use the appropriate tools and techniques described above. Try different combinations of sockets, extensions, and U-joints to find the best approach for each bolt.
5. If Bolts Are Stuck: If a bolt won't budge, apply more penetrating oil and let it sit for a while. Consider using gentle heat (be extremely cautious not to damage anything) or even an impact wrench as a last resort. If a bolt head breaks off, you'll need specialized tools for extraction (like bolt extractors).
6. Lower the Transmission: Once all three bolts are removed, carefully lower the transmission using the transmission jack.
Important Considerations:
* Repair Manual: A factory service manual for your 1996 Jeep Grand Cherokee is invaluable. It will show you exactly where the bolts are located, the correct bolt sizes, and the proper removal procedure.
* Safety: Always use jack stands and chocks to secure your vehicle. Never work under a vehicle supported only by a jack.
* Professional Help: If you're uncomfortable working on this yourself or encounter significant difficulties, consider seeking professional help from a mechanic. This is a challenging repair, and mistakes could lead to costly damage.
Remember, safety first! If you're unsure about any step, don't hesitate to consult a professional.
