The drive shaft is a spinning metal bar that transfers power from the engine to the wheels. While rear-wheel and front-wheel drive vehicles have one of these components, four-wheel drive models contain two drive shafts—one for each axle. This is because the engine must power each wheel, and you will generally need drive shaft repair after about 75,000 miles, as these parts receive more use. However, you can spot problems with it before it breaks and immobilizes the vehicle, and below are several indications that it is wearing out.

When Should You Schedule Drive Shaft Repair?

1. Difficulty Turning

When driving your vehicle, it should turn smoothly and operate easily. However, as the drive shaft breaks down, it cannot transfer enough torque to the wheels of a large truck. This prevents them from moving fast enough, hindering your forward motion even when trying to drive in a straight line. The additional resistance from trying to turn the wheels worsens the issue. This problem needs immediate attention because it prevents you from operating the vehicle safely.

2. Vibrations

When manufacturers assemble and mount a drive shaft, they balance it carefully so that it spins without vibrating. This ensures a smooth ride, even if you are hauling a large trailer. However, if you detect vibrations from beneath the vehicle, particularly when accelerating from a stop, the drive shaft is likely out of balance. Common causes of this include worn bushings—vibration insulators—or a failed universal joint, which is a coupling that transmits power at an angle from the shaft.

3. Noises During Acceleration

A bad drive shaft can lead to many unusual noises from beneath the vehicle. These occur when you press the accelerator, and they include scraping, rattling, knocking, and squealing. These sounds indicate that weakened bushings aren't providing enough space between components, allowing them to hit each other while in motion. Alternatively, the shaft may be loose in the universal joint, causing it to move unevenly.

If you need expert drive shaft repair to restore your truck's functionality, contact Commercial Machine Service in Kalispell, MT. This machine shop provides high-quality workmanship and friendly, attentive customer service to clients throughout northwest Montana. They specialize in part fabrication and tooling, CNC machining, welding, and hydraulic equipment repair. Visit the website for more information about their services. Call (406) 752-4979 to speak with a team member about your needs.