This manual covers the 2004 through 2007 model years of the FourTrax Rancher 400 AT, specifically the TRX400FA (Standard AT) and TRX400FGA (AT with GPS) variants. As a robust All-Terrain Vehicle (ATV), the Rancher 400 AT is engineered for versatility and reliability in demanding off-road conditions. It features a powerful 397cc liquid-cooled engine paired with an automatic transmission (Hondamatic) and electronically selectable 2WD/4WD system, making it suitable for work, recreation, and exploration. The fourth-generation Rancher line is recognized for its durable construction, independent double-wishbone suspension on all wheels, and the advanced integration of GPS navigation on the FGA model, enhancing its utility for various tasks. This comprehensive workshop service and repair manual provides detailed information essential for the maintenance and repair of your FourTrax Rancher 400 AT. It covers a wide array of systems including the engine, automatic transmission, drivetrain, chassis, body, and electrical components. Within its 515 pages, you will find step-by-step procedures for scheduled maintenance, tune-ups, fluid changes, complete disassembly and reassembly of major components, and systematic troubleshooting guides for common issues. The manual also includes hundreds of original photographs and illustrations, technical specifications, and wiring diagrams, empowering owners and technicians to effectively diagnose, maintain, and repair their vehicle. 🏷️ Basic Information Identification Make: Honda Model: FourTrax Rancher 400 AT Model Codes: TRX400FA, TRX400FGA Vehicle Type: ATV (All-Terrain Vehicle) Production Years Covered: 2004, 2005, 2006, 2007 Generation Generation Identifier: Fourth Generation (TRX400FA/FGA) Codes Chassis Codes: TRX400FA (Standard AT), TRX400FGA (AT with GPS) 👋 Introduction Market Position Target Audience: Owners of 2004-2007 Honda FourTrax Rancher 400 AT (TRX400FA/TRX400FGA) seeking to perform maintenance, repairs, and diagnostics. Also useful for professional technicians. Competitive Analysis Advantage: Provides dealer-level repair information at a fraction of the cost. Instant download eliminates shipping delays and costs associated with physical manuals. Comprehensive and highly detailed, covering all aspects of the vehicle. Key Features Manual Features: Hundreds of original photographs and illustrations, step-by-step procedures, complete disassembly/reassembly guides, troubleshooting sections, and technical specifications. 📋 Manual Details Coverage Areas Supported Models: 2004-2007 Honda Rancher TRX400FA (4x4 Auto Transmission), 2004-2007 Honda Rancher TRX400FGA (4x4 Auto Transmission with GPS) Page Count Total Pages: 515 Manual Type Type: Official Full Workshop Service and Repair Manual (FSM) Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine Removal/Installation, Cylinder Head/Valve/Camshaft, Cylinder/Piston, Centrifugal Clutch, Alternator/Starter Clutch, Sub-Transmission/Gearshift Linkage, Crankshaft/Automatic Transmission (Hondamatic), Front Driving Mechanism, Rear Driving Mechanism Chassis And Body: Frame, Body Panels, Exhaust System, Front Wheels/Suspension/Steering, Rear Wheels/Suspension, Brake System, Selectable 4WD System Electrical And Fuel: Fuel System, Lubrication System, Battery/Charging System, Ignition System, Electric Starter, Lights/Meters/Switches, Wiring Diagram Procedures Included Maintenance: Scheduled Maintenance, Tune-Ups, Lubrication Schedule, Fluid Checks and Changes (Engine Oil, Gear Oil, Coolant) Repair: Complete Overhaul procedures for engine, transmission, drivetrain, suspension, brakes, and electrical components. Detailed repair instructions for specific parts and systems. Troubleshooting: Systematic diagnostic procedures for common and uncommon issues, including error code interpretation (if applicable for the era), no-spark diagnosis, starting problems, and performance issues. Technical Depth Depth: Highly Detailed, covering complete disassembly and reassembly. Suitable for novice DIY mechanics to experienced professionals. Includes hundreds of original photographs and illustrations. 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Printable without restriction. All pages can be printed as needed. Binding Type Binding: Digital Download (PDF) Paper Type Paper Quality: N/A (Digital Format) Compatibility Operating Systems: All Versions of Windows & Mac Requirements Software Requirements: Adobe PDF Reader ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 4-stroke, OHC, 4-valve, Unicam Displacement: 397cc Bore X Stroke: 85 mm x 70 mm Compression Ratio: 8.9:1 Performance Horsepower: Approximately 22-25 HP (Specific figures vary slightly by year and testing method, details within manual) Torque: Detailed torque specifications for all engine fasteners are provided in the manual. Fuel System Carburetor: 34 mm Constant Velocity (CV) Carburetor (Specific model: Keihin, details on jetting and adjustments in manual) Fuel Type: Unleaded gasoline, 86 octane minimum Lubrication System Oil Type: SAE 10W-40 API SG or higher. Specific Honda recommendations available in manual. Oil Capacity: Details on oil capacity for engine and transmission are provided. Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) with electronic advance Cooling System Cooling Method: Liquid-cooled Coolant Type: Honda Motorcycle Coolant or equivalent. Details on mixture ratio and capacity provided. 🔧 Transmission Standard Transmission Type: Automatic transmission with torque converter and electronic shifting (Hondamatic) Gear Selection: Trax (Drive), Neutral, Reverse Features Drive System: Shaft drive Selectable 4Wd: Yes, electronically selectable 2WD/4WD Transmission Fluid: Honda ATV Specific Transmission Fluid or equivalent. Manual specifies type and capacity. 📐 Dimensions Exterior Overall Length: Approximately 77.7 inches (1973 mm) Overall Width: Approximately 45.1 inches (1145 mm) Overall Height: Approximately 45.5 inches (1156 mm) Wheelbase: Approximately 50.6 inches (1285 mm) Weights Dry Weight: Approximately 560 lbs (254 kg) Curb Weight: Approximately 593 lbs (269 kg) Capacities Fuel Capacity: 3.1...