Your Driveline Repairs Explained
Manual and Automatic Transmissions
Your driveline is responsible for transferring power to your wheels. To start, your transmission’s inner gears are designed to optimize your engine’s power. If your truck has a manual transmission, you’ll have a clutch that connects and disconnects your engine’s flywheel. Automatic transmissions, on the other hand, will have heavy-duty torque converters that automatically connect the two components.
If your truck has multiple drive modes, you’ll likely have a transfer case. A transfer case is responsible for providing an additional layer of gearing, as well as allowing secondary output shafts to lock into place. This is commonly found on lighter-duty work trucks and large logging trucks.
Driveshafts (Output Shafts)
Most semi-trucks will have two driveshafts. One between their transmission and first differential and a second between each of the rear differentials. These components rotate and transfer power from one component to another. They use bearings to facilitate frictionless movement and are vital components of your driveline.
Differentials and Axle Shafts
Your differentials are designed to split the power coming from your drive shaft in two different directions. Most operate based on the path of least resistance, but there are variants that have locking or limited slip capabilities. Axle shafts, on the other hand, are essentially small driveshafts that connect your differential to your wheel hub.
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