Subaru Subaru WRX 2014-2021 TR690 Transmission Specifications
This document provides a detailed overview of the TR690 transmission specifications for the 2014-2021 Subaru WRX. It includes technical details such as gear ratios, torque capacity, fluid requirements, and compatibility with different WRX models. The purpose of this document is to assist automotive enthusiasts, technicians, and performance tuners in understanding the transmission's capabilities, maintenance requirements, and potential upgrades. Whether you're performing routine maintenance, diagnosing issues, or planning performance modifications, this comprehensive guide offers valuable insights to ensure optimal performance and longevity of your Subaru WRX's transmission.
Overview Specifications
This document provides detailed technical specifications and operational insights for the TR690 transmission used in the 2014-2021 Subaru WRX. It is designed for enthusiasts, mechanics, and engineers seeking comprehensive information about the transmission's design, performance, and maintenance. Use this guide to understand the TR690's features, troubleshoot issues, and optimize its performance. The document is organized into sections for easy navigation and includes a quick reference for key specifications.
How to Use
Use the search functionality to quickly locate specific terms or topics within the document. Enter keywords related to the TR690 transmission, such as 'gear ratios' or 'torque capacity,' to find relevant sections.
Navigate through the document using the table of contents or by scrolling through sections. Each major section is labeled with a title and description, making it easy to find the information you need.
Key Specifications
Transmission Type
6-speed manual
Torque Capacity
400 Nm (295 lb-ft)
Gear Ratios
3.636:1 (1st) to 0.756:1 (6th)
Weight
Approx. 45 kg (99 lbs)
Fluid Capacity
3.5 liters (3.7 quarts)
Available Specifications
Transmission Design
This section covers the structural and mechanical design of the TR690 transmission, including its layout, materials, and key components. Learn about the transmission's construction and how it integrates with the Subaru WRX's drivetrain.
Transmission Design
This section covers the structural and mechanical design of the TR690 transmission, including its layout, materials, and key components. Learn about the transmission's construction and how it integrates with the Subaru WRX's drivetrain.
Gearbox Layout
- 6-speed manual transmission
- Front-engine, all-wheel-drive configuration
- Compact and lightweight design
- Dual-mass flywheel for smoother operation
- Helical-cut gears for reduced noise
- Synchronized reverse gear
Materials and Durability
- High-strength aluminum alloy casing
- Hardened steel gears for increased durability
- Carbon synchronizers for improved shift quality
- Sealed bearings for reduced maintenance
- Corrosion-resistant coatings
- Designed for high torque applications
Performance Specifications
Explore the performance characteristics of the TR690 transmission, including gear ratios, torque capacity, and shift dynamics. This section provides insights into how the transmission enhances the driving experience of the Subaru WRX.
Performance Specifications
Explore the performance characteristics of the TR690 transmission, including gear ratios, torque capacity, and shift dynamics. This section provides insights into how the transmission enhances the driving experience of the Subaru WRX.
Gear Ratios
- 1st gear: 3.636:1
- 2nd gear: 2.375:1
- 3rd gear: 1.761:1
- 4th gear: 1.346:1
- 5th gear: 0.971:1
- 6th gear: 0.756:1
Torque Capacity
- Rated for up to 400 Nm (295 lb-ft) of torque
- Optimized for turbocharged engines
- Handles high-performance driving conditions
- Enhanced clutch engagement for quick shifts
- Designed for aggressive launch control
- Supports aftermarket tuning upgrades
Maintenance and Troubleshooting
This section provides guidance on maintaining the TR690 transmission and addressing common issues. Learn about recommended service intervals, fluid specifications, and troubleshooting tips to keep the transmission in optimal condition.
Maintenance and Troubleshooting
This section provides guidance on maintaining the TR690 transmission and addressing common issues. Learn about recommended service intervals, fluid specifications, and troubleshooting tips to keep the transmission in optimal condition.
Service Intervals
- Transmission fluid change every 60,000 miles
- Inspect clutch assembly every 30,000 miles
- Check for leaks during routine maintenance
- Replace synchronizers if shifting becomes difficult
- Lubricate shift linkage annually
- Monitor for unusual noises or vibrations
Common Issues
- Grinding during shifts
- Difficulty engaging gears
- Fluid leaks from seals
- Excessive clutch wear
- Noisy operation in cold weather
- Delayed engagement in reverse
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Transmission Specifications
Overview
- Type
- 6-speed manual
- Configuration
- Front-engine, all-wheel drive
- Platform
- Subaru Global Platform
- Material
- Aluminum alloy casing
- Location
- Front longitudinal
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 22.8 inches (579 mm)
- Height
- 18.3 inches (465 mm)
- Weight
- 125 lbs (56.7 kg)
- input Shaft Diameter
- 1.18 inches (30 mm)
- Output Shaft Diameter
- 1.57 inches (40 mm)
- Gear Ratio 1st
- 3.454
- Gear Ratio 6th
- 0.756
Materials
- Casing
- Aluminum alloy
- Gears
- Case-hardened steel
- Synchros
- Carbon composite
- Bearings
- High-strength steel
- Shift Forks
- Forged steel
Features
- Performance
-
- Short-throw shifter
- High-torque capacity
- Optimized gear ratios
- Dual-cone synchros
- Durability
-
- Reinforced casing
- Hardened gears
- Heat-treated shafts
- Sealed bearings
- Drivability
-
- Smooth shift feel
- Low vibration
- Precise clutch engagement
- Reduced noise
- Technology
-
- Direct linkage
- Hydraulic clutch system
- Integrated sensors
- Lightweight design
- Compatibility
-
- Subaru EJ20/EJ25 engines
- Symmetrical AWD system
- OEM clutch kits
- Factory ECU integration
Safety Features
- Structural
-
- Reinforced bell housing
- Crush zones
- Fire-resistant seals
- Operational
-
- Gear position sensors
- Overheat protection
- Fail-safe mode
- Environmental
-
- Sealed against water ingress
- Corrosion-resistant coating
- Low-emission materials
Comfort Features
- Ergonomics
-
- Lightweight clutch pedal
- Smooth gear engagement
- Reduced shift effort
- Noise Reduction
-
- Helical cut gears
- Vibration dampening
- Acoustic insulation
- Temperature Control
-
- Integrated cooling fins
- Thermal-resistant seals
- Efficient lubrication
- User Experience
-
- Positive shift feedback
- Consistent performance
- Low maintenance
Accessories
- Performance
-
- Short-throw shifter kit
- Upgraded clutch kit
- Lightweight flywheel
- Maintenance
-
- Transmission fluid kit
- Seal replacement kit
- Bearing overhaul kit
- Cosmetic
-
- Custom shift knob
- Transmission cover
- Decal kit
Maintenance
- Service interval
- 30,000 miles or 24 months
- Service Items
-
- Fluid replacement
- Clutch inspection
- Bearing check
- Seal inspection
- Shift linkage adjustment
- Maintenance Notes
-
- Use Subaru Extra MT fluid
- Inspect for leaks regularly
- Avoid aggressive shifting
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Parts and labor
- Powertrain
- Miles: 60,000Years: 5Coverage: Transmission components
- Corrosion
- Miles: UnlimitedYears: 5Coverage: Casing and seals
- Extended
- Miles: 100,000Years: 7Coverage: Optional extended coverage
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Precision CNC machining
- Heat treatment
- Quality assembly
- Dynamic testing
- Quality Control
- inspection: 100% component testingTolerance: ±0.001 inchesTesting: Durability and performance
- Sustainability
-
- Recycled materials
- Energy-efficient production
- Low-waste processes
- Production Metrics
- Units Per Year: 50,000Defect Rate: <0.1%Lead Time: 4 weeks
Service Information for tr690 transmission Service
Maintenance and service requirements specific to this component
- Replace transmission fluid
- Inspect clutch system
- Check shift linkage
- Inspect seals for leaks
- Lubricate moving parts
Use only Subaru Extra MT fluid for optimal performance
- Replace clutch components if needed
- Inspect and replace bearings
- Check gear synchronization
- Test shift feel and engagement
- Inspect for wear on gears
Special tools required for bearing replacement
- Complete transmission overhaul
- Replace all seals and gaskets
- Inspect and replace synchros
- Check and adjust gear mesh
- Perform performance testing
Major service requires professional equipment and expertise
Common Questions
Find answers to common questions about torque specifications
Q1 Is the TR690 transmission compatible with all 2014-2021 Subaru WRX models?
Is the TR690 transmission compatible with all 2014-2021 Subaru WRX models?
The TR690 transmission is specifically designed for the 2014-2021 Subaru WRX models, including both manual and automatic variants. It is compatible with the 2.0L and 2.5L turbocharged engines. However, ensure the transmission model matches your vehicle's specifications, as slight variations exist between model years and trims. Always verify compatibility using your VIN or consult a Subaru dealer for confirmation.
Q2 What are the maintenance requirements for the TR690 transmission?
What are the maintenance requirements for the TR690 transmission?
The TR690 transmission requires regular maintenance to ensure optimal performance. Subaru recommends changing the transmission fluid every 30,000 to 60,000 miles, depending on driving conditions. Inspect seals and gaskets for leaks during routine service. For manual transmissions, check the clutch system and replace worn components as needed. Adhering to the maintenance schedule in the owner’s manual is crucial for longevity.
Q3 How do I replace the TR690 transmission in my Subaru WRX?
How do I replace the TR690 transmission in my Subaru WRX?
Replacing the TR690 transmission involves several steps: 1) Safely lift the vehicle and remove the undercarriage shields. 2) Drain the transmission fluid and disconnect the driveshaft, shift linkage, and electrical connectors. 3) Support the transmission with a jack and remove mounting bolts. 4) Carefully lower and remove the old transmission. 5) Install the new transmission, reconnect components, and refill with the recommended fluid. Professional installation is recommended for optimal results.
Q4 What should I do if my TR690 transmission is making unusual noises?
What should I do if my TR690 transmission is making unusual noises?
Unusual noises from the TR690 transmission may indicate issues such as low fluid levels, worn bearings, or damaged gears. First, check the transmission fluid level and top it up if necessary. If the noise persists, inspect for leaks or damaged components. For grinding or whining sounds, consult a professional mechanic to diagnose and repair the issue promptly to avoid further damage.
Q5 How can I optimize the performance of my TR690 transmission?
How can I optimize the performance of my TR690 transmission?
To optimize TR690 transmission performance, use high-quality synthetic transmission fluid and ensure proper fluid levels. Regularly inspect and replace worn clutch components for manual transmissions. Avoid aggressive shifting and excessive load to reduce wear. For automatic variants, consider performance tuning to improve shift responsiveness. Always follow Subaru’s maintenance guidelines for best results.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2014-2021 Subaru WRX Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and troubleshooting for the TR690 transmission and other components.
TR690 Transmission Technical Bulletin
Coming SoonLatest updates and technical information regarding the TR690 transmission, including common issues and fixes.
Subaru WRX Parts and Accessories Catalog
Coming SoonDetailed catalog of OEM and aftermarket parts for the 2014-2021 Subaru WRX, including transmission components.
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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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