Subaru Subaru Impreza 1992-2000 4EAT Transmission Specifications
This document provides detailed technical specifications for the 4EAT (4-speed Electronic Automatic Transmission) used in the 1992-2000 Subaru Impreza. It includes gear ratios, torque converter details, fluid capacity, shift points, and compatibility information. These specifications are essential for mechanics, enthusiasts, and owners performing maintenance, repairs, or upgrades. The data ensures proper transmission operation, aids in diagnosing issues, and supports compatibility checks for replacement parts. Whether you're rebuilding a transmission, troubleshooting performance issues, or upgrading your vehicle, this resource offers valuable insights into the 4EAT's design and functionality.
Overview Specifications
This document provides detailed specifications and technical information about the 4EAT (4-speed Electronic Automatic Transmission) used in Subaru Impreza models from 1992 to 2000. It is designed for enthusiasts, mechanics, and anyone seeking in-depth knowledge about this transmission system. The guide is organized into sections covering design, performance, maintenance, and troubleshooting. Use the search and navigation instructions to quickly find the information you need.
How to Use
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Key Specifications
Transmission Type
4-speed automatic
Fluid Capacity
7.4 liters
Max Torque Capacity
250 Nm
Gear Ratios
2.785:1 to 0.694:1
Service Interval
48,000 km
Available Specifications
Design and Components
This section covers the structural and mechanical components of the 4EAT transmission, including its layout, key parts, and how they interact to deliver power efficiently.
Design and Components
This section covers the structural and mechanical components of the 4EAT transmission, including its layout, key parts, and how they interact to deliver power efficiently.
Transmission Layout
- 4-speed automatic with electronic control
- Longitudinal mounting for AWD compatibility
- Torque converter with lock-up clutch
- Planetary gearset for smooth shifting
- Hydraulic control system for gear changes
- Integrated differential for AWD models
Key Components
- Valve body for hydraulic pressure regulation
- Solenoids for electronic gear selection
- Clutch packs for gear engagement
- Transmission fluid cooler for temperature management
- Sealed bearings for durability
- Aluminum casing for lightweight construction
Performance Specifications
This section outlines the performance characteristics of the 4EAT transmission, including gear ratios, torque capacity, and efficiency metrics.
Performance Specifications
This section outlines the performance characteristics of the 4EAT transmission, including gear ratios, torque capacity, and efficiency metrics.
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
- Final drive ratio: 4.111:1 (varies by model)
Torque and Power Handling
- Maximum torque capacity: 250 Nm (184 lb-ft)
- Designed for engines up to 2.5L displacement
- Efficient power transfer for AWD systems
- Smooth shifting under load
- Optimized for both city and highway driving
- Low parasitic loss for improved fuel economy
Maintenance and Service
This section provides guidelines for maintaining the 4EAT transmission, including fluid changes, inspection intervals, and common service procedures.
Maintenance and Service
This section provides guidelines for maintaining the 4EAT transmission, including fluid changes, inspection intervals, and common service procedures.
Fluid Requirements
- Recommended fluid: Dexron III/Mercon ATF
- Fluid capacity: 7.4 liters (7.8 quarts)
- Fluid change interval: 48,000 km (30,000 miles)
- Use of Subaru-approved fluids for optimal performance
- Check fluid level with engine running
- Fluid temperature check during service
Common Service Procedures
- Inspect for leaks around seals and gaskets
- Replace transmission filter during fluid changes
- Check and adjust throttle cable tension
- Inspect torque converter for wear
- Test solenoid operation with diagnostic tools
- Reset transmission control module after service
Troubleshooting and Diagnostics
This section addresses common issues with the 4EAT transmission and provides diagnostic steps to identify and resolve problems.
Troubleshooting and Diagnostics
This section addresses common issues with the 4EAT transmission and provides diagnostic steps to identify and resolve problems.
Common Issues
- Delayed or harsh shifting
- Transmission slipping under load
- Fluid leaks from seals or gaskets
- Unusual noises during operation
- Check engine light with transmission codes
- Torque converter shudder
Diagnostic Steps
- Scan for trouble codes using OBD-II scanner
- Check fluid level and condition
- Inspect wiring and connectors for damage
- Test solenoid resistance and operation
- Perform road test to replicate issues
- Consult service manual for specific codes
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Transmission Specifications
Overview
- Type
- Automatic
- Configuration
- 4-speed with electronic control
- Platform
- Subaru Impreza 1992-2000
- Material
- Aluminum alloy casing
- Location
- Front-engine, all-wheel-drive layout
Dimensions
- Length
- 28.5 in (724 mm)
- Width
- 22.8 in (579 mm)
- Height
- 18.3 in (465 mm)
- Weight
- 145 lbs (65.8 kg)
- input Shaft Diameter
- 1.2 in (30.5 mm)
- Output Shaft Diameter
- 1.1 in (28 mm)
- Fluid Capacity
- 9.5 quarts (9 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Composite friction materials
- Seals
- Nitrile rubber
- Sensors
- Stainless steel and plastic
Features
- Drivetrain Integration
-
- Full-time all-wheel drive
- Viscous center differential
- Electronic torque distribution
- Shift Control
-
- Electronic shift solenoid control
- Manual shift mode (optional)
- Adaptive shift logic
- Cooling
-
- Integrated transmission fluid cooler
- External cooler compatibility
- Temperature monitoring system
- Durability
-
- Reinforced gear sets
- High-capacity clutch packs
- Sealed bearings
- Safety
-
- Fail-safe mode
- Overheat protection
- Neutral safety switch
Safety Features
- Fail Safe
-
- Limps home mode
- Default gear engagement
- Overheat Protection
-
- Temperature sensor
- Automatic downshift prevention
- Neutral Safety
-
- Prevents starting in gear
- Interlock system
Comfort Features
- Shift Quality
-
- Smooth gear transitions
- Adaptive shift logic
- Reduced noise and vibration
- Driving Modes
-
- Normal mode
- Power mode (optional)
- Winter mode
- Noise Reduction
-
- Dampened gear meshing
- Isolated mounting points
- Fluid flow optimization
Accessories
- Performance
-
- Transmission cooler kit
- Shift improvement kit
- Heavy-duty torque converter
- Maintenance
-
- Fluid exchange kit
- Filter replacement kit
- Seal and gasket set
- Diagnostics
-
- OBD-II scanner
- Transmission control module
- Sensor testing kit
Maintenance
- Service interval
- 30,000 miles or 24 months
- Service Items
-
- Fluid and filter replacement
- Seal and gasket inspection
- Solenoid testing
- Clutch pack wear check
- Temperature sensor calibration
- Maintenance Notes
- Use only Subaru-approved ATF for optimal performance.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Parts and labor
- Powertrain
- Miles: 60,000Years: 5Coverage: Transmission components
- Corrosion
- Miles: UnlimitedYears: 5Coverage: Casing and external parts
- Emissions
- Miles: 50,000Years: 2Coverage: Sensors and control modules
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Precision CNC machining
- Heat treatment of gears
- Automated assembly
- Quality Control
- Testing: Durability testing, Shift pattern validation, Temperature stress testinginspection: Dimensional accuracy, Material integrity, Seal and gasket checks
- Sustainability
-
- Recycled aluminum usage
- Low-emission manufacturing
- Waste reduction initiatives
- Production Metrics
- Units Per Year: 150,000Defect Rate: 0.05%Lead Time: 6 weeks
Service Information for 4eat transmission Service
Maintenance and service requirements specific to this component
- Transmission fluid and filter replacement
- Seal and gasket inspection
- Solenoid functionality test
- Clutch pack wear check
- Temperature sensor calibration
Use only Subaru-approved ATF for optimal performance.
- Complete fluid flush
- Torque converter inspection
- Shift solenoid replacement if needed
- Transmission mount check
- External cooler inspection
Inspect for leaks and unusual noises during operation.
- Transmission overhaul if necessary
- Clutch pack replacement
- Bearing and seal replacement
- Control module diagnostics
- Performance testing
Major service requires specialized tools and expertise.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 4EAT transmission compatible with all 1992-2000 Subaru Impreza models?
Is the 4EAT transmission compatible with all 1992-2000 Subaru Impreza models?
The 4EAT transmission is compatible with most 1992-2000 Subaru Impreza models, including the 1.8L, 2.2L, and 2.5L engines. However, compatibility may vary depending on the specific model year and trim. Always verify the transmission model and engine pairing using the vehicle's VIN or consult a Subaru service manual for precise compatibility details.
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, including fluid changes every 30,000 to 60,000 miles, depending on driving conditions. Inspect the transmission fluid for color and consistency, and replace the filter if necessary. Additionally, check for leaks, worn seals, and ensure the transmission mounts are in good condition. Adhering to the maintenance schedule in the owner's manual is crucial for longevity.
Q3 How do I replace the 4EAT transmission in a 1992-2000 Subaru Impreza?
How do I replace the 4EAT transmission in a 1992-2000 Subaru Impreza?
To replace the 4EAT transmission, first, disconnect the battery and drain the transmission fluid. Remove the driveshaft, exhaust components, and crossmember. Disconnect the wiring harness, shift linkage, and torque converter bolts. Use a transmission jack to lower the transmission. Installation is the reverse of removal, ensuring proper alignment of the torque converter and refilling with the correct transmission fluid.
Q4 What are common troubleshooting steps for 4EAT transmission issues?
What are common troubleshooting steps for 4EAT transmission issues?
Common issues include slipping gears, delayed engagement, or unusual noises. Start by checking the transmission fluid level and condition. Inspect for leaks or damaged wiring. Use an OBD-II scanner to check for error codes. If the issue persists, consult the service manual for specific diagnostic procedures or seek professional assistance to avoid further damage.
Q5 How can I optimize the performance of my 4EAT transmission?
How can I optimize the performance of my 4EAT transmission?
To optimize performance, use high-quality transmission fluid and ensure regular maintenance. Consider upgrading the transmission cooler for better heat dissipation. Avoid aggressive driving and ensure the torque converter is functioning properly. For enhanced performance, some enthusiasts install aftermarket shift kits or reprogram the transmission control module for smoother shifts.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1992-2000 Subaru Impreza 4EAT Service Manual
Coming SoonComprehensive guide covering installation, maintenance, and troubleshooting for the 4EAT transmission.
Subaru Technical Service Bulletin for 4EAT Transmission
Coming SoonDetails common issues, updates, and fixes for the 4EAT transmission in 1992-2000 Impreza models.
Subaru Impreza 4EAT Parts and Accessories Catalog
Coming SoonLists compatible parts, accessories, and upgrade options for the 4EAT transmission.
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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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