🏷️ Basic Information Identification Manual Product Name: ELECTROMATIC JR403-E ( JR403-E JR403 E ) Automatic Transmission Auto Gearbox Repair Workshop Manual Transmission Model: JR403-E Transmission Type: Automatic Transmission (Electronically Controlled) Codes Transmission Internal Code: JR403-E Transmission Related Codes: RE4R01A (similar design basis) 👋 Introduction Market Position Market Segment: Light to medium-duty commercial vehicles and specific passenger applications requiring robust automatic transmissions. Competitive Analysis Similar Transmissions: RE4R01A (Nissan Pathfinder, 240SX, 300ZX), Aisin Warner AW-4 (Jeep Cherokee XJ), GM 700R4/4L60E (early variants), Ford E4OD (different architecture but similar duty cycle). Key Features Transmission Design Philosophy: Robust, electronically controlled automatic transmission designed for durability and smooth power delivery in demanding applications. Shares lineage and design principles with the well-regarded Nissan RE4R01A but scaled for heavier duty. Durability Focus: The JR403-E was engineered with durability as a primary concern, making it suitable for commercial applications where reliability is paramount. 📋 Manual Details Coverage Areas Applicable Vehicle Makes: GMC, Isuzu, Nissan, Mazda, Mitsubishi Applicable Vehicle Models: Tiltmaster (GMC), Various models using JR403-E (Isuzu, Nissan, Mazda, Mitsubishi) Applicable Years: 1988 onwards Page Count Page Count: 120 Manual Type Manual Type: Workshop / Service / Repair Manual Language Language: English Format File Format: PDF Compatibility Operating Systems: All Versions of Windows & Mac Availability Downloadable: YES Requirements Software Requirements: Adobe PDF Reader 📖 Manual Coverage Systems Covered Primary Focus: JR403-E Automatic Transmission Key Systems: Hydraulic Control System, Electronic Control Unit (ECU) interface, Torque Converter, Gear Sets, Planetary Gear Train, Clutch Packs, Bands, Valve Body, Oil Pump, Cooling System Integration Procedures Included Diagnostic Procedures: Troubleshooting of common faults, Diagnostic Trouble Codes (DTCs) interpretation (if applicable to the transmission's electronic control), Hydraulic circuit testing, Electrical component testing (solenoids, sensors) Repair Procedures: Complete disassembly and reassembly of the JR403-E transmission, Component replacement (clutch packs, seals, bearings, solenoids), Valve body overhaul, Torque converter installation and servicing Maintenance Procedures: Fluid level checks and adjustments, Fluid and filter changes, Seal replacements Recalibration Procedures: If the transmission has a separate TCM, procedures for recalibration or replacement might be included, depending on the manufacturer's service strategy for this unit. Technical Depth Depth Of Coverage: Comprehensive repair and overhaul procedures suitable for professional technicians and experienced DIYers. Diagnostic Tools Required: Basic hand tools, specialized transmission tools (e.g., seal drivers, snap ring pliers), diagnostic scanner (for electronic control diagnosis, if applicable) Troubleshooting Diagnostic Charts: Expected to include symptom-based diagnostic charts to help technicians pinpoint the cause of transmission problems. Technical Data Torque Specifications: Crucial torque specifications for various fasteners and assembly components (e.g., valve body bolts, transmission pan bolts, torque converter bolts) will be detailed. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: Digital (High-Resolution Scans/Digital Format) Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Searchability Searchable Text: Likely searchable (depending on PDF creation, but typical for professionally formatted manuals) Clarity And Diagrams Illustrations And Diagrams: Likely contains detailed exploded views, hydraulic circuit diagrams, and electrical schematics essential for accurate diagnosis and repair. Quality of diagrams is crucial for a workshop manual. ⚙️ Engine Specifications Primary Engine Compatible Engine Types: Likely designed for a range of inline 4-cylinder, inline 6-cylinder, and potentially V6/V8 engines common in light commercial vehicles and SUVs of the era. Specific engine fitment depends on the vehicle make and model. Performance Torque Handling Capacity: Designed to handle moderate to high torque outputs, consistent with its use in commercial vehicles like the GMC Tiltmaster. Fuel System Engine Fuel Type: Primarily gasoline, but potentially adapted for diesel engines in some commercial applications. 🔧 Transmission Standard Standard Transmission Type: JR403-E Electronically Controlled Automatic Transmission Optional Optional Transmission Type: Manual transmissions were likely available in some of the listed vehicle models. Features Gear Ratios: Specific gear ratios vary by application, but typically offer a good spread for acceleration and highway cruising. (Detailed ratios would be in the manual). Electronic Control Features: Shift point optimization, torque converter lock-up control, potentially manual shift modes or performance modes depending on vehicle integration. Torque Converter Lockup: Yes, typically features torque converter lock-up for improved fuel efficiency at cruising speeds. Fluid Requirements Transmission Fluid Type: Likely requires Dexron-III or equivalent ATF (Automatic Transmission Fluid). Consult the manual for precise specifications and capacities. Fluid Capacity: Typically between 8-11 quarts (7.5-10.5 liters) for a drain and refill, but higher for a complete overhaul. Exact capacity will be detailed in the manual. 📐 Dimensions Exterior Physical Size: Considered a medium-duty transmission, larger and heavier than typical passenger car automatics. Specific dimensions are not provided but inferred from application. Weights Approximate Weight: Estimated 200-250 lbs (90-115 kg) dry, depending on specific configuration. 🛡️ Safety Features Ratings Safety Design Focus: Built for durability and reliable operation in commercial applications, contributing to overall vehicle safety. Active Features Transmission Safety Features: Electronically controlled shifts aimed at smoother operation and...