Steering Rack Assembly (LHD)
SKU:
321591
$2,934.00
- Type: A complete steering rack and pinion assembly, which is the core component of the vehicle’s steering system. For these Maserati models, it is typically a hydraulic power steering rack, meaning it uses hydraulic fluid pressure to assist the driver’s steering effort. The “LHD” designation is crucial, indicating it is designed for vehicles where the driver sits on the left side of the car. The “M139HL” reference in the part description points to its compatibility with the specific chassis and steering system architecture found in the GranTurismo/GranCabrio (which share some heritage with the M139 Quattroporte).
- Function: The primary functions of this steering rack assembly are fundamental to vehicle control, driver feedback, and safety:
- Translates Steering Input: Converts the rotational motion of the steering wheel into the linear (side-to-side) motion required to turn the front wheels via the tie rods.
- Power Assistance: Provides hydraulic power assistance, significantly reducing the effort required by the driver to turn the steering wheel, especially at low speeds or during parking maneuvers.
- Road Feedback: Transmits sensory information from the road surface back to the driver through the steering wheel, providing crucial feedback on traction, road conditions, and vehicle behavior.
- Steering Precision: Engineered for high precision and minimal play, ensuring accurate and responsive steering, vital for a performance-oriented vehicle like a Maserati.
- Components: A complete steering rack assembly typically includes:
- The rack gear (a linear rod with teeth)
- The pinion gear (which meshes with the rack)
- The rack housing
- Internal hydraulic power steering components (valves, pistons, seals, fluid passages)
- Power steering lines connection points
- Inner tie rod ends (often directly integrated or attached with protective boots).
- Mounting points for attachment to the vehicle’s subframe.
- It generally does NOT include the outer tie rod ends, power steering pump, reservoir, or fluid.
- Location: Mounted horizontally, typically behind the engine or suspension crossmember, between the front wheels. The steering column connects to the pinion gear, and the tie rods extend from the rack to the steering knuckles.
- Material: Constructed from robust materials like cast iron or aluminum for the housing, and hardened steel for the rack and pinion gears, designed to withstand immense forces, provide durability, and maintain precise tolerances.
- Design: Precisely engineered and calibrated to the specific steering ratio and hydraulic assist requirements of the Maserati GranCabrio and GranTurismo. The “LHD” specific design ensures correct pedal and steering column alignment for left-hand drive markets.