Subaru Subaru Legacy 2005-2009 4EAT Transmission Specifications
This document provides detailed technical specifications for the 4EAT (4-Speed Electronic Automatic Transmission) used in the 2005-2009 Subaru Legacy. It includes gear ratios, fluid capacity, torque converter specifications, and shift points, along with maintenance intervals and compatibility details. These specifications are essential for mechanics, enthusiasts, and owners looking to understand, maintain, or repair their vehicle's transmission. The data is sourced from official Subaru service manuals and technical guides, ensuring accuracy and reliability. Whether you're diagnosing issues, performing upgrades, or simply learning about your vehicle, this resource offers valuable insights into the 4EAT transmission's design and performance.
Overview Specifications
This document provides detailed specifications and technical information about the 4EAT (4-speed Electronic Automatic Transmission) used in the 2005-2009 Subaru Legacy. It is designed for enthusiasts, mechanics, and owners seeking to understand the transmission's features, maintenance, and performance. Use the search and navigation instructions to quickly find relevant sections or refer to the quick reference table for key specifications.
How to Use
Use the search bar to enter keywords like 'gear ratios' or 'fluid capacity' to locate specific information. Results will highlight relevant sections for easy access.
Scroll through the document or use the table of contents to jump to major sections. Each section is divided into subsections with detailed technical points for clarity.
Key Specifications
Transmission Type
4-Speed Automatic
Gear Ratios
2.785:1 to 0.694:1
Fluid Capacity
9.5 quarts
Torque Handling
Up to 250 lb-ft
Service Interval
60,000 miles
Available Specifications
Transmission Design
This section covers the design and engineering of the 4EAT transmission, including its construction, components, and how it integrates with the Subaru Legacy's drivetrain. Learn about its durability, efficiency, and unique features.
Transmission Design
This section covers the design and engineering of the 4EAT transmission, including its construction, components, and how it integrates with the Subaru Legacy's drivetrain. Learn about its durability, efficiency, and unique features.
Construction and Materials
- Aluminum alloy casing for reduced weight
- High-strength steel gears for durability
- Sealed design to prevent fluid leaks
- Integrated torque converter for smooth power delivery
Drivetrain Integration
- Compatible with Subaru's Symmetrical AWD system
- Designed for longitudinal engine placement
- Supports both turbocharged and naturally aspirated engines
- Optimized for balanced weight distribution
Performance Specifications
Explore the performance characteristics of the 4EAT transmission, including gear ratios, shift points, and torque handling. This section provides insights into how the transmission enhances the driving experience.
Performance Specifications
Explore the performance characteristics of the 4EAT transmission, including gear ratios, shift points, and torque handling. This section provides insights into how the transmission enhances the driving experience.
Gear Ratios
- 1st Gear: 2.785:1
- 2nd Gear: 1.545:1
- 3rd Gear: 1.000:1
- 4th Gear: 0.694:1
- Reverse Gear: 2.272:1
Shift Points
- Smooth upshifts at 2,500-3,500 RPM under normal driving
- Downshifts optimized for engine braking
- Adaptive shift logic for varying driving conditions
- Manual mode for driver-controlled shifting
Maintenance and Service
This section provides guidelines for maintaining the 4EAT transmission, including fluid recommendations, service intervals, and common troubleshooting tips. Ensure longevity and optimal performance with proper care.
Maintenance and Service
This section provides guidelines for maintaining the 4EAT transmission, including fluid recommendations, service intervals, and common troubleshooting tips. Ensure longevity and optimal performance with proper care.
Fluid Specifications
- Recommended fluid: Subaru ATF-HP
- Fluid capacity: 9.5 quarts (including torque converter)
- Fluid change interval: Every 60,000 miles
- Use of non-recommended fluids may void warranty
Common Issues
- Delayed engagement when cold
- Slipping gears due to worn clutch packs
- Check engine light for transmission-related codes
- Regular inspections to prevent major failures
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Transmission Specifications
Overview
- Type
- Automatic
- Configuration
- 4-speed with electronic control
- Platform
- Subaru Legacy 2005-2009
- Material
- Aluminum alloy casing
- Location
- Front-engine, all-wheel-drive configuration
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 22.8 inches (579 mm)
- Height
- 18.3 inches (465 mm)
- Weight
- 165 lbs (75 kg)
- input Shaft Diameter
- 1.2 inches (30.5 mm)
- Output Shaft Diameter
- 1.4 inches (35.6 mm)
- Fluid Capacity
- 9.5 quarts (9 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Composite friction materials
- Seals
- Viton rubber
- Sensors
- Stainless steel and plastic
Features
- Transmission Control
-
- Electronic shift control
- Adaptive shift logic
- Manual mode with paddle shifters (optional)
- Drivetrain Integration
-
- Symmetrical all-wheel drive
- Torque split control
- Active torque distribution
- Cooling System
-
- Integrated transmission cooler
- Fluid temperature sensor
- Auxiliary cooler support
- Performance
-
- Smooth shift transitions
- Lock-up torque converter
- Optimized gear ratios
- Safety
-
- Fail-safe mode
- Overheat protection
- Shift interlock system
Safety Features
- Electronic Protection
-
- Over-rev protection
- Overheat shutdown
- Low fluid level warning
- Mechanical Protection
-
- Shear pin safety
- Reinforced casing
- Impact-resistant mounts
Comfort Features
- Shift Quality
-
- Smooth gear transitions
- Reduced shift shock
- Quiet operation
- Driver Assistance
-
- Hill holder assist
- Creep function
- Adaptive shift patterns
Accessories
- Performance Upgrades
-
- High-capacity transmission cooler
- Upgraded torque converter
- Performance shift kit
- Maintenance Tools
-
- Fluid exchange kit
- Diagnostic scanner
- Seal replacement kit
- Replacement Parts
-
- Filter and gasket kit
- Solenoid pack
- Shift linkage components
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Transmission fluid change
- Filter replacement
- Seal inspection
- Solenoid testing
- Shift linkage adjustment
- Maintenance Notes
- Use only Subaru-approved transmission fluid for optimal performance.
Warranty
- Basic Warranty
- Miles: 36,000Years: 3Coverage: Parts and labor
- Powertrain Warranty
- Miles: 60,000Years: 5Coverage: Transmission components
- Extended Warranty
- Miles: 100,000Years: 7Coverage: Optional extended coverage
- Warranty Terms
- Warranty void if improper fluids or unauthorized modifications are used.
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser alignment
- Quality Control
- Testing: Durability testing, Shift pattern validation, Temperature stress testinginspection: Dimensional accuracy, Material integrity, Seal integrity
- Sustainability Practices
-
- Recycled aluminum usage
- Low-emission manufacturing
- Waste reduction initiatives
- Production Metrics
- Units Per Year: 150,000Defect Rate: 0.05%Energy Efficiency: 85%
Service Information for 4eat transmission Service
Maintenance and service requirements specific to this component
- Transmission fluid replacement
- Filter and gasket replacement
- Seal inspection
- Solenoid testing
- Shift linkage adjustment
Use only Subaru-approved transmission fluid.
- Transmission fluid flush
- Torque converter inspection
- Clutch pack wear check
- Shift solenoid replacement if needed
- Diagnostic scan for error codes
Inspect for leaks and unusual noises.
- Complete transmission overhaul
- Replace all seals and gaskets
- Inspect and replace worn gears
- Test and recalibrate shift logic
- Performance verification
Major service requires specialized tools and expertise.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 4EAT transmission compatible with other Subaru models?
Is the 4EAT transmission compatible with other Subaru models?
The 4EAT transmission used in the 2005-2009 Subaru Legacy is specifically designed for this model range. While it shares similarities with other Subaru 4EAT transmissions, compatibility with other models depends on factors like engine type, drivetrain configuration, and mounting points. Always verify with a Subaru dealer or technical expert before attempting cross-model compatibility.
Q2 What are the maintenance requirements for the 4EAT transmission?
What are the maintenance requirements for the 4EAT transmission?
The 4EAT transmission requires regular maintenance to ensure optimal performance. This includes checking and replacing the transmission fluid every 30,000-60,000 miles, inspecting the transmission pan for leaks, and ensuring the torque converter is functioning properly. Regular servicing of the transmission filter and seals is also recommended to prevent wear and tear.
Q3 How do I replace the 4EAT transmission in a 2005-2009 Subaru Legacy?
How do I replace the 4EAT transmission in a 2005-2009 Subaru Legacy?
Replacing the 4EAT transmission involves several steps: 1) Disconnect the battery and remove the transmission mount. 2) Drain the transmission fluid and disconnect all electrical connectors. 3) Remove the driveshaft and exhaust components. 4) Support the engine and remove the transmission bolts. 5) Carefully lower the transmission and replace it with the new unit. Reverse the steps for installation, ensuring all connections are secure.
Q4 What should I do if my 4EAT transmission is slipping or not shifting properly?
What should I do if my 4EAT transmission is slipping or not shifting properly?
If your 4EAT transmission is slipping or not shifting, start by checking the transmission fluid level and condition. Low or dirty fluid can cause shifting issues. Inspect the transmission filter and replace it if clogged. If the problem persists, check for error codes using an OBD-II scanner. Common issues include faulty solenoids, worn clutch packs, or a failing torque converter.
Q5 How can I optimize the performance of my 4EAT transmission?
How can I optimize the performance of my 4EAT transmission?
To optimize the 4EAT transmission, use high-quality transmission fluid recommended by Subaru. Regularly check and maintain fluid levels. Consider installing an aftermarket transmission cooler to reduce heat buildup, which can extend the lifespan of the transmission. Avoid aggressive driving and ensure the transmission is properly tuned for your driving conditions.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2005-2009 Subaru Legacy 4EAT Transmission Service Manual
Coming SoonThis manual provides detailed instructions for servicing and repairing the 4EAT transmission, including diagrams, torque specifications, and troubleshooting tips.
Subaru Technical Service Bulletin for 4EAT Transmission
Coming SoonThis bulletin addresses common issues and updates for the 4EAT transmission, including software updates and recommended repair procedures.
Subaru Legacy 4EAT Transmission Parts Catalog
Coming SoonThis catalog lists all OEM and aftermarket parts compatible with the 4EAT transmission, including part numbers and descriptions.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.
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