Subaru Subaru WRX 2008-2014 Drivetrain Specifications
Explore the detailed drivetrain specifications for the 2008-2014 Subaru WRX, including transmission types, differential configurations, and AWD system details. Ideal for mechanics, enthusiasts, and owners seeking performance insights and maintenance guidance.
Overview Specifications
This document provides detailed specifications and technical information about the drivetrain of the 2008-2014 Subaru WRX. It is designed to help enthusiasts, mechanics, and owners understand the key components and features of the vehicle's drivetrain system. Use the search and navigation instructions to quickly find specific details or explore sections for a comprehensive understanding.
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Scroll through the document or use the table of contents to jump to specific sections. Each section is organized into subsections with detailed technical points for easy reference.
Key Specifications
Transmission Type
5-speed manual / 4-speed automatic
AWD System
Symmetrical AWD
Center Differential
Viscous limited-slip
Rear Differential
Viscous limited-slip
Gear Ratios (Manual)
1st: 3.454, 2nd: 1.947, 3rd: 1.366, 4th: 0.972, 5th: 0.738
Available Specifications
Transmission System
The transmission system of the 2008-2014 Subaru WRX is designed for performance and durability. This section covers the manual and automatic transmission options, gear ratios, and key features that enhance driving dynamics.
Transmission System
The transmission system of the 2008-2014 Subaru WRX is designed for performance and durability. This section covers the manual and automatic transmission options, gear ratios, and key features that enhance driving dynamics.
Manual Transmission
- 5-speed manual transmission standard across all models
- Gear ratios: 1st (3.454), 2nd (1.947), 3rd (1.366), 4th (0.972), 5th (0.738)
- Dual-cone synchronizers for smoother shifts
- Short-throw shifter available as an option
Automatic Transmission
- 4-speed automatic transmission available on select models
- Gear ratios: 1st (2.785), 2nd (1.545), 3rd (1.000), 4th (0.694)
- Sportshift mode for manual-like control
- Torque converter with lock-up clutch
All-Wheel Drive System
The Subaru WRX is renowned for its symmetrical all-wheel drive (AWD) system. This section explains the mechanics of the AWD system, its benefits, and how it enhances traction and stability in various driving conditions.
All-Wheel Drive System
The Subaru WRX is renowned for its symmetrical all-wheel drive (AWD) system. This section explains the mechanics of the AWD system, its benefits, and how it enhances traction and stability in various driving conditions.
Symmetrical AWD
- Standard symmetrical AWD system on all models
- 50:50 torque split under normal conditions
- Active torque distribution for improved handling
- Viscous limited-slip center differential
Performance Benefits
- Enhanced traction on slippery surfaces
- Improved cornering stability
- Reduced understeer and oversteer
- Optimized weight distribution
Differential System
The differential system in the 2008-2014 Subaru WRX plays a crucial role in power distribution and handling. This section covers the types of differentials used and their specific functions.
Differential System
The differential system in the 2008-2014 Subaru WRX plays a crucial role in power distribution and handling. This section covers the types of differentials used and their specific functions.
Front Differential
- Open front differential standard
- Helical limited-slip differential available on STI models
- Integrated with the transmission housing
Rear Differential
- Viscous limited-slip rear differential standard
- Torsen limited-slip differential on STI models
- Enhanced traction during acceleration
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Component Specifications
Overview
- Type
- All-Wheel Drive (AWD)
- Configuration
- Symmetrical AWD
- Platform
- Subaru Global Platform
- Material
- High-strength steel and aluminum
- Location
- Front-engine, longitudinal layout
Dimensions
- Driveshaft Length
- 56.3 inches (1430 mm)
- Front Axle Width
- 60.2 inches (1529 mm)
- Rear Axle Width
- 60.6 inches (1539 mm)
- Transfer Case Length
- 12.8 inches (325 mm)
- Differential Height
- 8.7 inches (221 mm)
- Driveshaft Diameter
- 2.5 inches (63.5 mm)
- Axle Shaft Diameter
- 1.2 inches (30.5 mm)
Materials
- Driveshaft
- High-strength steel
- Differential Housing
- Aluminum alloy
- Axle Shafts
- Chromoly steel
- Transfer Case
- Aluminum alloy with steel gears
- Cv Joints
- Forged steel with PTFE lining
Features
- Performance
-
- Symmetrical AWD for balanced weight distribution
- Active torque vectoring
- Limited-slip rear differential
- High-capacity cooling system
- Durability
-
- Reinforced driveshaft
- Heavy-duty differential mounts
- Sealed bearings
- Corrosion-resistant coatings
- Control
-
- Vehicle Dynamics Control (VDC)
- Traction Control System (TCS)
- Electronic Brake-force Distribution (EBD)
- Hill Start Assist
- Efficiency
-
- Lightweight aluminum components
- Optimized gear ratios
- Low-friction bearings
- Efficient lubrication system
- integration
-
- Seamless integration with Subaru Boxer engine
- Compatible with manual and automatic transmissions
- Integrated ABS system
- Direct linkage to steering system
Safety Features
- Stability
-
- Symmetrical AWD for improved traction
- Electronic stability control
- Roll-over mitigation
- Braking
-
- ABS integration with AWD
- Brake-force distribution
- Hill descent control
- Structural
-
- Reinforced drivetrain mounts
- Crash-resistant driveshaft
- Protected differential housing
Comfort Features
- Noise Reduction
-
- Insulated driveshaft tunnel
- Low-noise gear meshing
- Vibration-dampening mounts
- Smoothness
-
- Precision-balanced driveshaft
- Smooth torque delivery
- Minimized drivetrain lash
- Handling
-
- Predictable AWD behavior
- Responsive torque distribution
- Balanced cornering
- Climate
-
- Heat-shielded components
- Cold-weather lubrication
- Thermal management system
Accessories
- Performance
-
- Short-throw shifter
- Upgraded differential bushings
- High-performance CV joints
- Lightweight driveshaft
- Protection
-
- Differential skid plate
- Driveshaft loop
- Axle boots
- Transfer case guard
- Maintenance
-
- Drivetrain fluid kit
- CV joint grease
- Differential cover
- Alignment tools
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Inspect driveshaft and CV joints
- Check differential fluid level
- Lubricate drivetrain components
- Inspect mounts and bushings
- Test AWD system functionality
- Maintenance Notes
- Use only Subaru-approved fluids and lubricants. Regularly check for leaks and unusual noises.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain
- Miles: 60,000Years: 5Coverage: Drivetrain 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
- Robotic assembly
- Laser alignment
- Dynamic balancing
- Quality Control
- inspection: 100% component testingTolerances: ±0.001 inchesTesting: Durability and performance validation
- Sustainability
-
- Recycled aluminum usage
- Energy-efficient manufacturing
- Waste reduction programs
- Production Metrics
- Units Per Day: 500Defect Rate: 0.01%Energy Usage: 15 kWh per unit
Service Information for drivetrain Service
Maintenance and service requirements specific to this component
- Inspect driveshaft and CV joints
- Check differential fluid level
- Lubricate drivetrain components
- Inspect mounts and bushings
- Test AWD system functionality
Use only Subaru-approved fluids and lubricants
- Replace differential fluid
- Inspect and repack CV joints
- Check drivetrain alignment
- Test transfer case operation
- Inspect driveshaft balance
Special tools required for differential service
- Complete drivetrain inspection
- Replace worn CV joints
- Rebuild or replace differential
- Check and replace drivetrain mounts
- Perform full AWD system calibration
Major service requiring specialized equipment
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What drivetrain components are compatible with the 2008-2014 Subaru WRX?
What drivetrain components are compatible with the 2008-2014 Subaru WRX?
The 2008-2014 Subaru WRX features a symmetrical all-wheel-drive system with a 5-speed manual or optional 4-speed automatic transmission. Compatible components include the EJ255 turbocharged engine, viscous limited-slip differential, and 3.90 final drive ratio. Aftermarket upgrades like STI drivetrain parts may require modifications. Always verify compatibility with your specific model year and trim.
Q2 What are the maintenance requirements for the WRX drivetrain?
What are the maintenance requirements for the WRX drivetrain?
Regular maintenance for the WRX drivetrain includes changing the transmission and differential fluids every 30,000-60,000 miles, inspecting CV joints and axles for wear, and checking the clutch system for proper operation. Ensure the all-wheel-drive system is functioning correctly by monitoring tire wear and alignment. Follow the manufacturer's service intervals for optimal performance.
Q3 How do I replace the clutch on a 2008-2014 Subaru WRX?
How do I replace the clutch on a 2008-2014 Subaru WRX?
To replace the clutch, first, disconnect the battery and remove the transmission. Unbolt the pressure plate and clutch disc, then install the new clutch components, ensuring proper alignment. Reassemble the transmission and adjust the clutch pedal free play. Torque all bolts to factory specifications and test the clutch operation before driving.
Q4 What should I do if my WRX drivetrain makes unusual noises?
What should I do if my WRX drivetrain makes unusual noises?
Unusual noises may indicate worn CV joints, failing differentials, or transmission issues. Inspect the CV boots for tears and check for play in the axles. Listen for grinding or whining sounds from the differential or transmission, which may require fluid changes or component replacement. Consult a professional mechanic for a thorough diagnosis.
Q5 How can I optimize the performance of my WRX drivetrain?
How can I optimize the performance of my WRX drivetrain?
To optimize performance, upgrade to high-performance transmission and differential fluids, install a short-throw shifter, and consider a lightweight flywheel for quicker revs. Ensure proper alignment and tire balance for the all-wheel-drive system. Regularly inspect and maintain drivetrain components to prevent wear and improve longevity.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2008-2014 Subaru WRX Service Manual
Coming SoonComprehensive guide covering drivetrain maintenance, repair procedures, and technical specifications for the 2008-2014 WRX.
Subaru Technical Service Bulletin: Drivetrain Noise
Coming SoonAddresses common drivetrain noise issues and provides recommended solutions for 2008-2014 WRX models.
Subaru WRX Performance Parts Catalog
Coming SoonCatalog of OEM and aftermarket drivetrain components, including clutches, differentials, and transmission upgrades.
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Technical Information
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