• Over time, the driveshaft in an automobile wears down and requires repair.red car image by Goran Bogicevic from Fotolia.com
  
  The driveshaft transfers power from the transmission to the differential in the back of rear- and four-wheel-drive vehicles. Rotation of the driveshaft allows for changes in suspension height. Located at the end of each driveshaft are flexible couplings, commonly referred to as U-joints. When rebuilding the drive shaft, you will generally need six tools: a U-joint pressing tool, socket set, vise, snap-ring pliers, brass punch and dial indicator.
  
  

U-Joint Pressing Tool

• A pressing tool allows for easy removal of the U-joints, ensuring that other parts of the drive shaft do not become damaged. You can also find complete pressing kits. Generally, they include receiver tubes that catch the U-joint upon removal. When removing the U-joints, check for signs of damage or corrosion. Replace damaged U-joints to restore proper performance of your driveshaft. Failing to replace worn and damaged parts can cause the drive shaft to separate from the vehicle. Driveshaft separation from the car may cause an inability to control the vehicle, potentially resulting in an accident or damage to the vehicle.
  
  

Socket Set

• Use a socket set to remove bolts on the driveshaft. Having a full range of sockets available will ensure that you have the right size socket for the job.
  
  

Vise

• A vise allows you to secure parts while removing and installing the driveshaft, preventing you from dropping and damaging parts. It will also make removal and installation easier by securing oily parts.
  
  

Snap Ring Pliers

• Snap ring pliers allow you to remove the clips on the cap of the driveshaft. Using the proper tools can prevent injury and damage to parts.
  
  

Brass punch

• Use a brass punch to remove the bearing caps. Gently tapping on the bearing caps with a brass punch and hammer can help dislodge the snap rings. Because brass is a soft material, the use of a brass punch will prevent sparking and damage to the bearing caps.
  
  

Dial Indicator

• Use a dial indicator to measure driveshaft runout. Check the manufacturer's recommendations to find the acceptable driveshaft runout for your vehicle. A runout amount higher than the manufacturer's recommendations will indicate that the driveshaft requires replacement. Check the driveshaft periodically to ensure safety while operating the vehicle. Early warning signs that the driveshaft may require replacement include a noticeable vibration in the steering wheel during driving and grinding or knocking sounds while turning.