Used Steering Gear Boxes | Power & Manual | All Makes & Models

Critical technical specifications vary by steering system type and vehicle application:

• Gear Box Specifications:
• • Worm Gear Measurements:
• - Input shaft endplay (0.001-0.004 inch tolerance)
• - Sector shaft backlash (0.004-0.008 inch spec)
• - Worm bearing preload (4-8 in-lbs torque)
• - Total gear ratio verification (12:1 to 24:1)
• - Input shaft spline count (36/48 tooth standard)
• Rack & Pinion Specifications:
• • Mechanical Measurements:
• - Rack travel length (±0.020 inch tolerance)
• - Pinion gear backlash (0.002-0.006 inch)
• - Rack bearing preload (2-4 in-lbs typical)
• - Inner tie rod length (model specific)
• - Center rack position (±1mm tolerance)
• Power Assist Systems:
• • Hydraulic Specifications:
• - Operating pressure (1000-2500 PSI range)
• - Flow rate requirements (2-3 GPM nominal)
• - Relief valve settings (1500-2200 PSI)
• - Line size specifications (pressure/return)
• - Pump flow characteristics curve
• Electric Power Steering:
• • System Requirements:
• - Motor output specifications
• - Torque sensor resistance values
• - Control module compatibility
• - Current draw specifications
• - Response curve verification

All specifications must be verified with precision measuring equipment.

Compatibility requirements vary significantly by manufacturer:

• Toyota/Lexus Applications:
• • Gear Box Systems:
• - Tundra (2015-2023): 17:1 ratio, 2000 PSI
• - Land Cruiser: High-pressure system specs
• - 4Runner: Manual/power specifications
• - Frame mounting pattern verification
• - Pitman arm spline configuration
• Ford/Lincoln Requirements:
• • Rack & Pinion Units:
• - F-150: Electric power assist specs
• - Explorer: Variable assist parameters
• - Mounting bushing durometer specs
• - Steering shaft spline count
• - Power assist calibration needs
• GM/Chevrolet Specifications:
• • System Requirements:
• - Silverado: HD steering specifications
• - Suburban: Power assist parameters
• - Sierra: Gear ratio requirements
• - Mounting point configurations
• - Electronic integration needs
• Honda/Acura Standards:
• • EPS Systems:
• - Accord: Electric power specs
• - CR-V: Torque sensor requirements
• - Control module parameters
• - Mounting dimensions
• - Network communication needs

Verify all specifications against original equipment requirements.

Installation procedures require precise measurements and specific tools:

• Pre-Installation Procedures:
• • System Preparation:
• - Alignment angle documentation
• - Steering wheel position lock
• - Battery disconnect protocol
• - Torque wrench calibration check
• - Line flushing requirements
• Mechanical Installation:
• • Critical Steps:
• - Mounting bolt torque sequence
• - Frame bracket alignment (±0.5mm)
• - Steering shaft connection
• - Line routing specifications
• - Ground clearance verification
• Power System Integration:
• • Setup Requirements:
• - Fluid pressure verification
• - Air bleeding procedures
• - Flow rate confirmation
• - Sensor calibration steps
• - Control module programming
• Final Adjustments:
• • Verification Steps:
• - Center position setting
• - Steering angle sensor reset
• - Stop-to-stop verification
• - Torque input measurement
• - System pressure testing

Professional installation tools and procedures are essential.

Diagnostic procedures require specific equipment and measurements:

• Mechanical Diagnostics:
• • Physical Testing:
• - Free play measurement (0.25-0.5 inch max)
• - Binding point detection
• - Noise source identification
• - Return force testing (2-4 lbs)
• - Center position verification
• Hydraulic System Tests:
• • Pressure Testing:
• - Static pressure (1500-2200 PSI)
• - Dynamic flow rates (2-3 GPM)
• - Relief valve operation
• - Return line restriction
• - Pump output verification
• Electronic Diagnostics:
• • System Checks:
• - Sensor signal verification
• - Control module communication
• - Torque sensor calibration
• - Assist curve programming
• - Fault code analysis
• Performance Testing:
• • Road Test Verification:
• - Steering effort measurement
• - Return to center behavior
• - System temperature monitoring
• - Noise evaluation protocol
• - Assist curve verification

Use manufacturer-specified diagnostic equipment and procedures.

Maintenance requirements vary by system type and usage:

• Regular Inspection:
• • Visual Checks:
• - Fluid condition analysis
• - Belt tension verification
• - Line condition inspection
• - Boot/seal integrity check
• - Mount condition verification
• Hydraulic Maintenance:
• • Fluid Service:
• - Fluid change intervals
• - System flush procedures
• - Filter replacement schedule
• - Pressure verification
• - Line inspection protocol
• Electronic System Care:
• • System Checks:
• - Sensor calibration verification
• - Module update requirements
• - Wiring inspection protocol
• - Ground connection check
• - Connector maintenance
• Preventive Measures:
• • Protection Steps:
• - Regular lubrication points
• - Environmental protection
• - Load stress management
• - Operating temperature control
• - Alignment maintenance

Follow manufacturer-specified maintenance intervals and procedures.