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Problems in the drive shaft cause symptoms in the vehicle's steering, performance, transmission, and torque. This is because the drive shaft passes power from the engine and transmission to the wheels through rods, drivetrains, and joints under the car.
This means that vehicles with four-wheel drive have a drive shaft passing power from the transmission and engine to all four wheels. Let's explore the symptoms of a bad drive shaft in better detail:
1. Vibrations While Driving
These vibrations are caused by worn-out u-joints (universal joints), damaged bearings, or an unbalanced drive shaft. The vibrations can worsen over time and damage other drivetrain components.
2. Clunking or Knocking Noises
A bad drive shaft makes clunking, knocking, or banging sounds, especially when shifting gears or accelerating. This happens because the shaft isn't rotating smoothly in the worn-out u-joints or CV joints in the system. This can progress into a complete driveshaft failure.
3. Vehicle Heavy to Turn
Since the drive shaft transfers power from the transmission to the wheels, any problem can make the wheels tough to handle. A damaged drive shaft can make turning feel rough and unpredictable.
4. Squeaking or Chirping Sounds
A high-pitched squeaking or chirping noise coming from underneath the vehicle means worn-out drive shaft components. These noises happen at low speeds and disappear at higher speeds. Over time, the squeaking can get worse, meaning you need to lubricate or replace the u-joints.
5. Shaking When Accelerating
If you feel a shudder or shake when you press the gas pedal, the drive shaft might be the culprit. This shuddering is often due to worn or faulty components, such as failing CV joints, loose carrier bearings, or a misaligned drive shaft.
6. Cracks, dents, or rust in the drive shaft
If you feel any of the symptoms mentioned above even at a slighter level, check under the car for the drive shaft's appearance. You might see cracks, dents, or rust damage. Wear and tear can weaken the structure of the drive shaft, leading to bad symptoms.
7. Loss of Power to the Wheels
In worst cases, a "totaled" drive shaft won't pass power to the wheels, leaving the vehicle still despite the engine running. This usually happens when the drive shaft snaps or disconnects.