Suspension & Steering Glossary

The Suspension & Steering system ensures a smooth, stable ride by absorbing shocks and allowing control over the vehicle’s direction. The suspension absorbs bumps and vibrations, while the steering system lets the driver control the vehicle's direction. Together, they improve handling, comfort, and stability on different road surfaces.

1. Air Suspension

Air suspension replaces traditional springs with airbags, allowing for height adjustment and improved ride quality, commonly used in luxury and heavy-duty vehicles.

2. Ball Joint

A ball joint connects the control arm to the steering knuckle, allowing for controlled movement of the wheel. It’s essential for smooth steering and suspension articulation.

3. Coil Spring

The coil spring absorbs impacts from the road, supporting the vehicle's weight and maintaining ride height.

4. Control Arm

Control arms connect the suspension to the vehicle frame, allowing wheels to move up and down while maintaining alignment.

5. Drag Link

The drag link transfers motion from the steering gearbox to the steering knuckle, controlling the wheels' direction.

6. Idler Arm

The idler arm supports the steering linkage on the passenger side, assisting in stabilizing steering and maintaining alignment.

7. Leaf Spring

Leaf springs are long, flat springs used in the rear suspension of trucks and heavy vehicles, providing a strong support system for heavier loads.

8. Power Steering Pump

The power steering pump provides hydraulic pressure to assist with turning the steering wheel, making steering easier.

9. Radius Arm

A radius arm attaches the axle to the vehicle’s frame, helping to maintain wheel alignment and reduce suspension movement.

10. Shock Absorber

Shock absorbers dampen vibrations and impacts from the road, working with springs to maintain stability and comfort.

11. Sway Bar

The sway bar connects opposite wheels, reducing body roll during turns and enhancing handling.

12. Tie Rod

The tie rod connects the steering rack to the steering knuckle, allowing wheels to turn based on steering input.

13. Upper Control Arm

The upper control arm connects the upper part of the steering knuckle to the vehicle’s frame, contributing to wheel alignment and suspension stability.

14. Lower Control Arm

The lower control arm connects the lower part of the steering knuckle to the frame, absorbing impacts and assisting in alignment.

15. Steering Gearbox

The steering gearbox translates the rotation of the steering wheel into lateral movement of the wheels, directing the vehicle.

16. Kingpin

A kingpin is a pivot point in the steering mechanism, commonly found in trucks and heavy vehicles, enabling the front wheels to turn.

17. Coilover

Coilovers are combined coil springs and shock absorbers, allowing height adjustments for improved handling and suspension tuning.

18. Suspension Bushing

Bushings are cushions between suspension components that reduce friction, noise, and vibration, enhancing comfort.

19. Rack and Pinion

The rack and pinion mechanism converts the rotational motion of the steering wheel into the linear motion that turns the wheels.

20. Steering Column

The steering column connects the steering wheel to the steering gearbox, transferring steering input to the wheels.

21. Pitman Arm

The pitman arm connects the steering gearbox to the drag link, converting the gearbox’s motion into steering movement.

22. Stabilizer Bar

The stabilizer bar, also known as a sway bar, reduces body roll during cornering, helping the vehicle stay level.

23. Torsion Bar

The torsion bar acts as a spring in the suspension system, twisting to absorb shocks and maintain ride height.

24. Steering Knuckle

The steering knuckle is a pivotal part that holds the wheel and allows it to turn, connecting the suspension and steering systems.

25. Strut Assembly

The strut assembly combines a shock absorber and a coil spring, providing support and absorbing road shocks.

26. Steering Rack

The steering rack houses the rack and pinion system, controlling the movement of the tie rods and, subsequently, the wheels.

27. Wheel Bearing

Wheel bearings reduce friction between the wheel and the axle, allowing smooth wheel rotation.

28. Axle Bearing

Axle bearings support the axles, enabling them to rotate within the housing smoothly, essential for stable movement.

29. Camber Adjuster

The camber adjuster modifies the angle of the wheels, optimizing alignment for improved handling and tire wear.

30. Steering Wheel Sensor

The steering wheel sensor monitors the wheel's position and rotation, aiding stability control and steering assistance systems.

31. Toe Adjuster

The toe adjuster controls the angle at which the wheels point in or out, influencing steering stability and tire wear.

32. Camber Plate

Camber plates allow for fine-tuning of wheel alignment angles, often used in performance vehicles for optimized handling.

33. Suspension Arm

Suspension arms, such as control arms, connect the wheel to the frame, allowing controlled wheel movement and supporting the vehicle.

34. Leaf Spring Shackle

The leaf spring shackle connects the leaf spring to the vehicle frame, allowing it to pivot and flex.

35. Strut Mount

The strut mount secures the strut to the vehicle and absorbs vibrations, contributing to ride comfort and stability.

36. Hydraulic Suspension

Hydraulic suspension uses hydraulic fluid to adjust the vehicle’s ride height and damping, providing a smoother, adaptable ride.

37. Alignment Shim

Alignment shims are used to adjust suspension angles, ensuring proper wheel alignment and handling.

38. Stabilizer Link

The stabilizer link connects the sway bar to the suspension, ensuring effective body roll reduction.

39. Coil Spring Spacer

Coil spring spacers increase ride height by fitting between the coil spring and its mount, often used in lift kits.

40. Caster Adjuster

The caster adjuster modifies the caster angle, which affects steering stability and vehicle control.

41. Steering Linkage

The steering linkage connects the steering column to the wheels, transferring steering input.

42. Ball Joint Cover

A ball joint cover protects the ball joint from dirt and debris, extending its lifespan.

43. Control Arm Bushing

Control arm bushings reduce friction between the control arm and the frame, improving ride comfort.

44. Strut Bellow

A strut bellow covers the strut, protecting it from dust and debris, helping maintain its performance.

45. Steering Damper

The steering damper reduces steering vibrations, enhancing control, especially in off-road vehicles.

46. Air Bag Suspension

Air bag suspension uses airbags instead of springs, allowing adjustable ride height and improved comfort.

47. Steering Coupling

The steering coupling connects sections of the steering shaft, ensuring flexibility and smooth operation.

48. Torsion Key

The torsion key adjusts the tension in torsion bars, allowing modifications to ride height.

49. Sway Bar Link

Sway bar links connect the sway bar to the control arm, ensuring stability during turns.

50. Control Arm Shaft

The control arm shaft holds the control arm bushings and connects the control arm to the frame, facilitating movement.

51. Steering Wheel Hub

The steering wheel hub connects the wheel to the steering column, transferring driver input to the steering system.

52. Anti-Roll Bar

The anti-roll bar, or sway bar, connects opposite sides of the suspension, reducing body roll and enhancing handling.

53. Center Link

The center link connects both sides of the steering linkage, allowing coordinated wheel movement.

54. Drag Link Socket

The drag link socket connects the pitman arm to the steering linkage, contributing to controlled steering motion.

55. Steering Column Cover

The steering column cover protects the steering column, enhancing appearance and protecting internal components.

56. Steering Coupler

The steering coupler connects sections of the steering column, accommodating flex and ensuring smooth input transfer.

57. Crossmember

The crossmember provides structural support, reinforcing the chassis and anchoring suspension components.

58. Caster Shim

Caster shims adjust the caster angle of the suspension, aiding in alignment and handling.

59. Axle Spacer

Axle spacers adjust the axle width, often used to enhance stability or accommodate larger wheels.

60. Steering Box

The steering box houses the steering mechanism, converting steering wheel input into wheel movement.

61. Kingpin Bushing

Kingpin bushings reduce friction between the kingpin and axle, allowing smooth pivoting of the wheels.

62. Bump Stop

Bump stops limit suspension travel to prevent bottoming out, protecting components from excessive compression.

63. Steering Column U-Joint

The steering column U-joint allows flexibility in the steering column, accommodating alignment changes while steering.

64. Steering Stabilizer

The steering stabilizer reduces wobble and vibration, especially on rough terrain or with larger tires.

65. Adjustable Track Bar

The adjustable track bar centers the axle under the vehicle, useful in lifted vehicles to maintain alignment.

66. Rear Leaf Spring

Rear leaf springs provide suspension support for the rear axle, commonly used in trucks for load-bearing capacity.

67. Idler Arm Bracket

The idler arm bracket mounts the idler arm to the frame, stabilizing the steering linkage.

68. Strut Spacer

Strut spacers lift the vehicle by increasing the height of the strut, often part of lift kits.

69. Center Bolt

The center bolt secures leaf spring leaves together, aligning the spring with the axle housing.

70. Wheel Spacer

Wheel spacers increase the wheelbase width, enhancing stability and allowing for larger tires.

71. Suspension Block

Suspension blocks raise the vehicle's height, typically installed between the leaf springs and axle.

72. Steering Damper Bracket

The steering damper bracket mounts the steering damper to the vehicle, supporting its function.

73. Air Shock

Air shocks use pressurized air to provide adjustable suspension height and damping control.

74. Alignment Gauge

An alignment gauge measures wheel angles like camber, caster, and toe, essential for proper alignment.

75. Ball Joint Press

The ball joint press is a tool for removing and installing ball joints, often required during suspension repairs.

76. Wheel Center Cap

The wheel center cap covers the wheel hub, enhancing appearance and protecting wheel components.

77. Torsion Bar Key

Torsion bar keys allow for height adjustments by modifying the torsion bar’s preload.

78. Steering Lock

A steering lock prevents the steering wheel from turning, commonly used as a theft prevention measure.

79. Leaf Spring Bushing

Leaf spring bushings reduce friction between the leaf spring and frame, enhancing suspension performance.

80. Coil Spring Isolator

The coil spring isolator reduces noise and vibration between the coil spring and mounting points.

81. Steering Arm

The steering arm connects the steering linkage to the wheel hub, transferring motion from the steering system to the wheels.

82. Spring Seat

The spring seat is a platform on which the coil or leaf spring rests, supporting and maintaining alignment.

83. Strut Bearing

The strut bearing allows the strut to rotate with the steering, reducing friction and aiding smooth turning.

84. Pitman Shaft Seal

The pitman shaft seal prevents fluid leaks around the pitman arm, maintaining hydraulic steering performance.

85. Center Link Bar

The center link bar is part of the steering linkage, connecting the tie rods and enabling coordinated steering.

86. Strut Tower Brace

The strut tower brace connects the strut towers, improving chassis stiffness and handling performance.

87. Tie Rod End

The tie rod end connects the tie rod to the steering knuckle, essential for precise steering and alignment.

88. Upper Ball Joint

The upper ball joint connects the upper control arm to the steering knuckle, allowing suspension movement.

89. Lower Ball Joint

The lower ball joint connects the lower control arm to the steering knuckle, crucial for suspension articulation.

90. Suspension Strut Rod

The suspension strut rod stabilizes the suspension, preventing excessive movement and enhancing control.

91. Front Axle Beam

The front axle beam supports the front wheels, providing alignment and stability for the front suspension.

92. Track Bar Bracket

The track bar bracket mounts the track bar, centralizing the axle and maintaining alignment.

93. Track Rod

The track rod, similar to a track bar, connects the axle to the frame, keeping the axle centered.

94. Steering Sector Shaft

The steering sector shaft transmits motion from the steering wheel to the pitman arm, aiding in controlled steering.

95. Airbag Suspension

Airbag suspension uses airbags to replace traditional springs, offering adjustable height and enhanced comfort.

96. Leveling Kit

Leveling kits adjust the vehicle’s front or rear height, often used to balance suspension or allow for larger tires.

97. Adjustable Track Rod

An adjustable track rod allows fine-tuning of axle position, essential in lifted vehicles for maintaining alignment.

98. Camber Bolt Kit

Camber bolt kits adjust the camber angle of the wheels, often used for improved alignment or handling.

99. Rear Control Arm

Rear control arms connect the rear axle to the vehicle frame, allowing controlled up-and-down movement.

100. Steering Pinion Seal

The steering pinion seal prevents leaks in the steering pinion, essential for hydraulic steering systems.