| Crabbing |
- Incorrect rear thrust angle
- Front or rear suspension components
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- Check the rear alignment.
- Check the front and rear suspension for signs of damage or wear
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| Drift/Pull/Wander |
- Tire pressures
- Uneven tire wear
- Damaged steering components
- Wheel alignment
- Brake drag
- Unevenly loaded or overloaded vehicle
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- Check and adjust the tire pressures (see visual inspection)
- Check for uneven tire wear, investigate the cause and rectify as necessary
- Check the steering for wear/damage
- Check and adjust the wheel alignment as necessary
- Check for binding brakes, rectify as necessary
- Advise the driver of the load issues
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| Front bottoming or riding low |
- Damaged suspension components
- Air spring fault
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- Check the suspension components for damage
- Check the dynamic suspension
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| Uneven tire wear |
- Incorrect tire pressure (rapid center rib or inner and outer edge wear)
- Incorrect front or rear toe (rapid inner or outer edge wear)
- Incorrect camber (rapid inner or outer edge wear)
- Tires out of balance (tires cupped or dished)
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- Check and adjust the tire pressures (see visual inspection)
- Check and adjust the wheel alignment as necessary
- Balance the wheels and tires as necessary
|
| Harsh ride |
- Damaged suspension components
- Air spring fault
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- Check the suspension components for damage
- Check the dynamic suspension
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| Shimmy or wheel tramp |
- Wheels/tires
- Loose wheel nut(s)
- Loose front suspension fasteners
- Front wheel bearing(s) fault
- Worn or damaged suspension component bushing
- Loose, worn or damaged ball joint(s)
- Loose, worn or damaged steering components
- Front wheel alignment
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- Check the wheels and tires for condition and balance
- Check and tighten the wheel nuts and suspension fasteners to specification
- Check the front wheel bearings, suspension bushings, ball joints and steering components for wear or damage
- Check and adjust the wheel alignment as necessary
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| Poor return ability of the steering (self-centering) |
- Steering column
- Ball joints
- Steering components
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- Check the steering column universal joints, etc
- Check the ball joints and other steering components
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| Sway or roll |
- Loose front or rear stabilizer bar
- Worn lower suspension arm stabilizer bar insulators
- Air spring fault
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- Check the stabilizer bar security and condition. Rectify as necessary
- Check the function of the active stabilization system (where installed).
- Check the air springs
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| Vehicle leans to one side |
- Front or rear suspension components
- Air spring fault
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- Check the front and rear suspension.
- Check the air springs.
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