Power Steering Gear Box For Toyota 1985-1991 4Runner 1989-1991 Pickup
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Power Steering Gear Box For Toyota 1985-1991 4Runner 1989-1991 Pickup

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A power steering gearbox for a Toyota 4Runner (1989-1991) or Pickup (1985-1991) is a crucial component of the vehicle’s steering system. It converts the rotational force from the steering wheel into the angular movement of the front wheels, enabling easier and more responsive steering. This gearbox is specifically designed to work with the power steering system, providing assistance to the driver’s steering inputs. 

Here’s a more detailed explanation:
  • Function:

    The steering gearbox, also known as the steering gear or steering gear assembly, is a core part of the steering system. It receives input from the steering wheel and translates it into the movement of the front wheels. 

  • Power Steering Assistance:

    In a power steering system, the gearbox works in conjunction with a power steering pump and other components to reduce the effort required to turn the steering wheel, particularly at lower speeds or when making tight turns. 

  • Compatibility:

    The specific power steering gearbox mentioned is designed for the mentioned Toyota models (4Runner 1989-1991, Pickup 1985-1991) and is often a direct replacement for the original equipment manufacturer (OEM) part. 

  • Features:

    These gearboxes are typically built to strict quality control standards, are easy to install, and are designed to meet or exceed OEM specifications. They often feature improved steering feel and handling, as well as reduced steering fatigue. 

  • Troubleshooting:
    A faulty steering gearbox can cause issues like clunking noises when turning, excessive play in the steering wheel, or fluid leaks. Replacing the gearbox can resolve these problems and restore proper steering function.

A power steering gear box for a 1985-1991 Toyota 4Runner and 1989-1991 Toyota Pickup, with part numbers 4411035190, 27-8473, 4411035070, and 278473, is typically made of steel and aluminum, finished in black, and features a 0.69 inch input shaft length. It’s a direct replacement for the OEM part and is designed for both RWD and 4WD models with naturally aspirated engines. 

Detailed Specifications:
  • Fitment: Toyota 4Runner 1989-1991, Toyota Pickup 1985-1991.
  • Part Numbers: 4411035190, 27-8473, 4411035070, 278473.
  • Material: Steel/Aluminum.
  • Color: Black.
  • Input Shaft Length: 0.69 inches.
  • Number of Mounting Holes: 3.
  • Pressure Port Thread Size: M16 x 1.5.
  • Return Port Thread Size: M17 x 1.5.
  • Engine Compatibility: Naturally Aspirated engines.
  • Drive Type Compatibility: RWD and 4WD.
  • Construction: Precision-engineered casting for durability and reliability.
  • Features: Corrosion resistance, optimized performance, and enhanced handling.
  • Installation: Direct replacement for OEM part, professional installation recommended, according to some sellers. 

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