Subaru Subaru Legacy 2005-2009 5EAT Transmission Specifications
This document provides detailed technical specifications for the 5EAT (5-speed Electronic Automatic Transmission) used in the 2005-2009 Subaru Legacy. It includes gear ratios, torque converter specifications, fluid capacity, and shift patterns. These specifications are essential for mechanics, enthusiasts, and owners looking to understand the transmission's performance, maintenance requirements, and compatibility with aftermarket upgrades. The data is sourced from official Subaru service manuals and technical bulletins, ensuring accuracy and reliability. Whether you're diagnosing issues, performing repairs, or planning upgrades, this resource offers valuable insights into the 5EAT transmission's design and functionality.
Overview Specifications
This document provides detailed specifications and technical information about the 5EAT (5-speed Electronic Automatic Transmission) used in the 2005-2009 Subaru Legacy. It is designed to assist enthusiasts, mechanics, and owners in understanding the transmission's features, maintenance requirements, and performance characteristics. Use the search and navigation tools to quickly find specific details or browse through sections for a comprehensive understanding.
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Key Specifications
Transmission Type
5EAT (5-speed Electronic Automatic)
Torque Capacity
258 lb-ft
Fluid Capacity
10.5 quarts
Gear Ratios
3.540 (1st) to 0.834 (5th)
Service Interval
60,000 miles
Available Specifications
Transmission Design and Features
This section covers the design principles and key features of the 5EAT transmission, including its electronic control system, gear configuration, and durability enhancements.
Transmission Design and Features
This section covers the design principles and key features of the 5EAT transmission, including its electronic control system, gear configuration, and durability enhancements.
Electronic Control System
- Utilizes a sophisticated TCU (Transmission Control Unit) for precise gear shifts
- Adaptive learning capability to optimize performance based on driving habits
- Integrated sensors for real-time monitoring of transmission conditions
- Supports manual mode for driver-controlled shifting
Gear Configuration
- 5 forward gears and 1 reverse gear
- Wide gear ratio spread for improved acceleration and fuel efficiency
- Smooth gear transitions with minimal shift shock
- Optimized for both city driving and highway cruising
Performance Specifications
This section provides detailed performance metrics for the 5EAT transmission, including gear ratios, torque capacity, and acceleration characteristics.
Performance Specifications
This section provides detailed performance metrics for the 5EAT transmission, including gear ratios, torque capacity, and acceleration characteristics.
Gear Ratios
- 1st Gear: 3.540
- 2nd Gear: 2.264
- 3rd Gear: 1.471
- 4th Gear: 1.000
- 5th Gear: 0.834
- Reverse Gear: 3.333
Torque Capacity
- Rated for up to 258 lb-ft of torque
- Designed to handle high-performance applications
- Robust clutch packs for enhanced durability
- Suitable for both turbocharged and naturally aspirated engines
Maintenance and Service
This section outlines maintenance requirements and service intervals for the 5EAT transmission, including fluid specifications and common troubleshooting tips.
Maintenance and Service
This section outlines maintenance requirements and service intervals for the 5EAT transmission, including fluid specifications and common troubleshooting tips.
Fluid Specifications
- Recommended fluid: Subaru ATF-HP
- Fluid capacity: Approximately 10.5 quarts (with torque converter)
- Fluid change interval: Every 60,000 miles under normal conditions
- Use of incorrect fluid may lead to transmission damage
Common Issues and Solutions
- Delayed shifting: Check fluid level and condition
- Transmission overheating: Inspect cooling system and fluid lines
- Unusual noises: Verify torque converter and gear alignment
- Error codes: Use diagnostic tools to identify TCU faults
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Transmission Specifications
Overview
- Type
- 5-speed automatic
- Configuration
- Longitudinal
- Platform
- Subaru Legacy 2005-2009
- Material
- Aluminum alloy casing
- Location
- Front-engine, all-wheel-drive
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
- 1.1 inches (28 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
- Drivetrain Integration
-
- Symmetrical all-wheel drive
- Active torque split control
- Vehicle Dynamics Control (VDC)
- Shift Control
-
- Sportshift manual mode
- Adaptive shift logic
- Grade logic control
- Cooling
-
- Integrated transmission cooler
- Thermostatically controlled fluid flow
- External cooler compatibility
- Sensors
-
- Input speed sensor
- Output speed sensor
- Fluid temperature sensor
- Pressure sensors
- Electronics
-
- TCU (Transmission Control Unit)
- CAN bus communication
- Fail-safe mode
Safety Features
- Fail Safe
-
- Limp-home mode
- Overheat protection
- Pressure loss protection
- Stability
-
- Torque vectoring
- Hill start assist
- Monitoring
-
- Real-time diagnostics
- Fluid level monitoring
Comfort Features
- Shift Quality
-
- Smooth shift transitions
- Adaptive shift patterns
- Reduced shift shock
- Noise Reduction
-
- Precision gear machining
- Vibration dampening mounts
- Acoustic insulation
- Driver Assistance
-
- Manual mode override
- Grade logic for uphill/downhill
- Sport mode for aggressive driving
Accessories
- Performance
-
- Transmission cooler kit
- Shift kit
- High-capacity torque converter
- Maintenance
-
- Fluid exchange kit
- Filter replacement kit
- Seal kit
- Diagnostics
-
- OBD-II scanner
- Transmission fluid tester
- Pressure gauge kit
Maintenance
- Service interval
- 30,000 miles or 24 months
- Service Items
-
- Fluid and filter replacement
- Seal inspection
- Sensor calibration
- Shift linkage adjustment
- Cooling system check
- Notes
- Use only Subaru ATF-HP fluid for optimal performance
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Parts and labor
- Powertrain
- Miles: 60,000Years: 5Coverage: Major components
- Corrosion
- Miles: UnlimitedYears: 5Coverage: Perforation only
- Emissions
- Miles: 80,000Years: 8Coverage: Federal emissions components
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Precision CNC machining
- Heat treatment of gears
- Automated assembly
- Laser alignment
- Quality Control
- Testing: Durability testing, Shift pattern validation, Thermal cyclingStandards: ISO 9001, JIS D 2001
- Sustainability
-
- Recyclable materials
- Energy-efficient manufacturing
- Waste reduction programs
- Production Metrics
- Units Per Year: 150,000Defect Rate: 0.02%Lead Time: 4 weeks
Service Information for 5eat transmission Service
Maintenance and service requirements specific to this component
- Fluid and filter replacement
- Seal inspection
- Shift linkage adjustment
- Sensor calibration
- Cooling system check
Use only Subaru ATF-HP fluid for optimal performance
- Transmission fluid flush
- Torque converter inspection
- Valve body cleaning
- Clutch pack wear check
- Electronic diagnostics
Requires specialized tools for valve body service
- Complete transmission overhaul
- Seal and gasket replacement
- Bearing inspection
- Shift solenoid testing
- Performance recalibration
Major service should be performed by certified technicians
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 5EAT transmission compatible with other Subaru models?
Is the 5EAT transmission compatible with other Subaru models?
The 5EAT transmission in the 2005-2009 Subaru Legacy is specifically designed for this model and its variants, such as the Outback. While it shares some design similarities with other Subaru transmissions, it is not directly compatible with non-Legacy models due to differences in mounting points, electronics, and drivetrain configurations. Always verify compatibility with a Subaru dealer or technical expert before attempting cross-model installations.
Q2 What are the maintenance requirements for the 5EAT transmission?
What are the maintenance requirements for the 5EAT transmission?
The 5EAT transmission requires regular maintenance to ensure optimal performance. This includes checking and replacing the transmission fluid every 30,000 to 60,000 miles, inspecting the transmission pan for leaks, and ensuring the torque converter is functioning properly. Additionally, the transmission control module (TCM) should be updated with the latest software to prevent shifting issues. Regular inspections by a certified technician are recommended.
Q3 How do I replace the 5EAT transmission in my Subaru Legacy?
How do I replace the 5EAT transmission in my Subaru Legacy?
Replacing the 5EAT transmission involves several steps: 1) Disconnect the battery and remove the transmission crossmember. 2) Drain the transmission fluid and disconnect all electrical connectors and linkages. 3) Support the engine and remove the transmission mounting bolts. 4) Carefully lower the transmission and install the new unit, ensuring proper alignment. 5) Reconnect all components, refill with transmission fluid, and test the system. Professional assistance is recommended for this complex procedure.
Q4 What should I do if my 5EAT transmission is not shifting properly?
What should I do if my 5EAT transmission is not shifting properly?
If your 5EAT transmission is not shifting properly, start by checking the transmission fluid level and condition. Low or contaminated fluid can cause shifting issues. Next, inspect the transmission control module (TCM) for error codes using a diagnostic tool. Common solutions include updating the TCM software, replacing faulty solenoids, or addressing electrical issues. If problems persist, consult a Subaru specialist for further diagnosis.
Q5 How can I optimize the performance of my 5EAT transmission?
How can I optimize the performance of my 5EAT transmission?
To optimize the performance of your 5EAT transmission, use high-quality transmission fluid and ensure it is changed regularly. Consider installing an aftermarket transmission cooler to reduce heat buildup, which can degrade performance. Regularly update the TCM software to benefit from Subaru's latest tuning improvements. Additionally, avoid aggressive driving habits that can strain the transmission and lead to premature wear.
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 5EAT Service Manual
Coming SoonThis comprehensive manual provides detailed instructions for servicing and repairing the 5EAT transmission, including troubleshooting, maintenance, and replacement procedures.
Subaru Technical Service Bulletin for 5EAT Transmission
Coming SoonThis bulletin addresses common issues with the 5EAT transmission, including software updates, shifting problems, and recommended repair procedures.
Subaru Legacy 5EAT Parts and Accessories Catalog
Coming SoonThis catalog lists all OEM and aftermarket parts and accessories compatible with the 5EAT transmission, including fluid, filters, and performance upgrades.
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We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
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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