How do you fix drive shaft on a 1979 Lincoln town car?

To fix the drive shaft on a 1979 Lincoln Town Car, first safely lift the vehicle and secure it on jack stands. Disconnect the drive shaft by removing the bolts at the universal joints and the rear differential. Inspect the drive shaft for any damage; if it's bent or worn, it may need to be replaced. Reinstall the new or repaired drive shaft by aligning it properly and tightening the bolts to the manufacturer's specifications.