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+# gearbox-dat
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+![](2025-09-24-17-12-02.png)
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mechanics-dat/mechanism-dat/mechanism-dat.md
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+- [[gearbox-dat]]
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+## differential
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+A **differential** is an essential device in a vehicle’s drivetrain, usually located in the drive axle.
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+
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+## Main Functions
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+1. **Allow different wheel speeds**
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+ - When driving straight, both wheels rotate at the same speed.
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+ - When turning, the outside wheel must travel farther, so it rotates faster.
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+ - The differential lets wheels rotate at different speeds while still receiving power.
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+
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+2. **Torque distribution**
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+ - Splits engine torque and delivers it to both wheels.
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+3. **Improved handling and stability**
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+ - Without a differential, turning would be difficult and could cause tire wear or drivetrain damage.
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+
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+## Common Types
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+- **Open Differential**
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+ - Simple, common type.
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+ - Loses traction if one wheel slips.
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+
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+- **Limited Slip Differential (LSD)**
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+ - Restricts excessive wheel speed difference.
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+ - Improves traction on slippery surfaces.
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+
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+- **Locking Differential**
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+ - Forces both wheels to rotate at the same speed.
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+ - Useful in off-road conditions.
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+- **Active Differential**
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+ - Electronically controlled.
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+ - Adjusts torque distribution dynamically based on driving conditions.
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## ref
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