A track control arm, commonly referred to as “chimta” in South Asian countries like Pakistan and India, is a crucial component of a car’s suspension system. It connects the vehicle’s chassis (frame) to the wheel hub or steering knuckle, allowing for controlled up-and-down movement of the wheels, while maintaining proper wheel alignment and handling.

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Function of a Track Control Arm:

1. Wheel Alignment: Helps maintain proper wheel position relative to the body of the car.
2. Smooth Ride: Absorbs shocks from bumps and potholes via bushings and ball joints.
3. Handling Stability: Ensures the wheels follow a predictable path for safe steering and braking.
4. Connection Point: Links suspension components to the vehicle’s frame.

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Construction:

A typical control arm consists of:

• Steel or aluminum arm: Durable and often shaped like an “A” or “L”.
• Bushings: Rubber or polyurethane inserts that absorb vibrations.
• Ball joint: A spherical bearing that allows for multi-directional movement and connects to the steering knuckle.

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Types of Control Arms:

1. Upper Control Arm: Used in double-wishbone suspension setups (less common in modern vehicles).
2. Lower Control Arm (Track Control Arm): Most commonly referred to as “chimta” and more widely used in modern independent suspension systems.
3. Single or Double Wishbone: Depending on the suspension design, there may be one or two arms per wheel.

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Symptoms of a Bad Track Control Arm:

• Clunking noises from the suspension.
• Uneven tire wear.
• Poor alignment or drifting.
• Vibration in the steering wheel.
• Loose or wandering steering.

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Maintenance and Replacement:

• Inspection: Regular checks during wheel alignment or suspension service.
• Lifespan: Typically lasts between 80,000 – 160,000 km, depending on driving conditions.
• Replacement Cost: Varies by make/model, generally ranges from $100 to $400 per arm (parts + labor).

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Common Vehicles Using Track Control Arms:

• Sedans (e.g., Honda Civic, Toyota Corolla)
• SUVs (e.g., Toyota Fortuner, Ford Explorer)
• Pickup trucks (e.g., Toyota Hilux, Ford Ranger)

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