Here's a general outline. Specifics may vary slightly depending on the exact model and transmission type (Powerglide, Powerglide with a converter, Muncie, etc.):
Tools You'll Likely Need:
* Jack and jack stands: Absolutely essential for safety.
* Wheel chocks: To prevent the car from rolling.
* Sockets and wrenches: Various sizes, likely including a 13/16" or 7/8" for the U-bolt nuts.
* Hammer: May be needed to break loose stubborn components.
* Torque wrench: For proper tightening upon reassembly.
* Penetrating oil (PB Blaster, etc.): To help loosen rusted bolts.
* Floor jack: May be useful for supporting the driveshaft during removal.
Steps:
1. Safety First: Securely jack up the rear of the car and place it on jack stands. Chock the front wheels.
2. Locate the Driveshaft: The driveshaft connects the transmission to the differential.
3. Disconnect the Driveshaft:
* U-bolts: Locate the U-bolts at the differential. Spray penetrating oil on the nuts and let it soak for a while. Then, carefully remove the nuts and U-bolts. Support the driveshaft to prevent it from falling.
* Transmission Flange (or Yoke): At the transmission end, you'll have a different connection method depending on the transmission type. This might involve removing bolts or a slip yoke. Refer to a repair manual specific to your Impala's transmission for this step. It's often crucial to support the driveshaft near the transmission during this step. A floor jack positioned underneath will help.
4. Lower the Driveshaft: Carefully lower the driveshaft. It might be helpful to have a helper.
5. Inspection: Once removed, inspect the driveshaft for any damage such as bent yokes, worn U-joints, or damaged slip yoke.
Important Considerations:
* Repair Manual: A shop manual specific to your 1964 Chevy Impala is invaluable. It will provide detailed diagrams and instructions for your specific model and transmission.
* Transmission Type: The procedure for disconnecting the driveshaft at the transmission will vary depending on whether you have a Powerglide, Turbo Hydra-Matic, or a manual transmission.
* Lubrication: Use plenty of penetrating oil to loosen rusted bolts and nuts. Allow time for the oil to penetrate.
* Torque Specifications: Always tighten the U-bolts and other fasteners to the manufacturer's specified torque. This information is typically found in a repair manual.
Disclaimer: This is a general guide. Improperly removing the driveshaft can lead to damage to your vehicle or personal injury. If you are not comfortable performing this repair yourself, it's best to take your car to a qualified mechanic.
