Subaru Subaru Forester 1997-2002 4EAT Transmission Specifications
This document provides detailed technical specifications for the 4EAT (4-speed Electronic Automatic Transmission) used in the 1997-2002 Subaru Forester. It includes gear ratios, torque converter specifications, fluid capacity, shift patterns, and maintenance intervals. These specifications are essential for mechanics, enthusiasts, and owners seeking to understand, maintain, or repair the transmission. The data is sourced from official Subaru service manuals and technical bulletins, ensuring accuracy and reliability. Whether you're diagnosing a transmission issue, performing routine maintenance, or upgrading your vehicle, this resource offers valuable insights into the 4EAT's design and operation.
Overview Specifications
This document provides detailed specifications and technical information about the 4EAT (4-speed Electronic Automatic Transmission) used in the 1997-2002 Subaru Forester. It is designed to assist mechanics, enthusiasts, and owners in understanding the transmission's features, maintenance requirements, and performance characteristics. Use the search and navigation instructions to quickly locate specific details or browse through sections for comprehensive insights.
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Navigate through the document using the section titles and subsections. Each section is organized by major topics, such as technical specifications, maintenance, and troubleshooting, making it easy to find the information you need.
Key Specifications
Transmission Type
4EAT (4-speed Electronic Automatic)
Gear Ratios
2.785:1 (1st) to 0.694:1 (4th)
Torque Capacity
250 Nm (184 lb-ft)
Fluid Capacity
9.5 liters (10 quarts)
Final Drive Ratio
4.111:1
Available Specifications
Technical Specifications
This section covers the core technical details of the 4EAT transmission, including gear ratios, torque capacity, and fluid requirements. It is essential for understanding the transmission's design and performance capabilities.
Technical Specifications
This section covers the core technical details of the 4EAT transmission, including gear ratios, torque capacity, and fluid requirements. It is essential for understanding the transmission's design and performance capabilities.
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
Torque Capacity
- Maximum Torque Capacity: 250 Nm (184 lb-ft)
- Designed for Subaru's 2.0L and 2.5L engines
- Suitable for both FWD and AWD configurations
- Optimized for smooth shifting under load
Fluid Requirements
- Transmission Fluid Type: Subaru ATF or equivalent
- Fluid Capacity: 9.5 liters (10 quarts)
- Recommended Change Interval: Every 48,000 km (30,000 miles)
- Fluid Temperature Range: -40°C to 150°C (-40°F to 302°F)
Maintenance Guidelines
This section provides detailed instructions for maintaining the 4EAT transmission, including fluid changes, filter replacements, and common inspection points. Proper maintenance ensures longevity and optimal performance.
Maintenance Guidelines
This section provides detailed instructions for maintaining the 4EAT transmission, including fluid changes, filter replacements, and common inspection points. Proper maintenance ensures longevity and optimal performance.
Fluid Change Procedure
- Drain old fluid from the transmission pan
- Replace the transmission filter and gasket
- Refill with recommended ATF fluid
- Check fluid level using the dipstick
- Run the engine and cycle through gears to ensure proper fluid circulation
Inspection Points
- Check for fluid leaks around the transmission pan and seals
- Inspect the driveshaft and CV joints for wear
- Monitor transmission temperature during operation
- Listen for unusual noises during gear shifts
Troubleshooting Common Issues
This section addresses common problems associated with the 4EAT transmission, such as slipping gears, delayed shifts, and fluid leaks. It provides diagnostic tips and potential solutions.
Troubleshooting Common Issues
This section addresses common problems associated with the 4EAT transmission, such as slipping gears, delayed shifts, and fluid leaks. It provides diagnostic tips and potential solutions.
Slipping Gears
- Check transmission fluid level and condition
- Inspect for worn clutch plates or bands
- Verify proper operation of the torque converter
- Test the transmission control module (TCM)
Delayed Shifts
- Inspect the throttle position sensor (TPS)
- Check for clogged transmission fluid passages
- Test the shift solenoids for proper operation
- Evaluate the condition of the valve body
Fluid Leaks
- Identify the source of the leak (pan, seals, or cooler lines)
- Replace damaged gaskets or seals
- Tighten loose bolts or fittings
- Use a UV dye to trace hard-to-find leaks
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Transmission Specifications
Overview
- Type
- Automatic
- Configuration
- 4-speed with electronic control
- Platform
- Subaru Forester 1997-2002
- 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
- 1.18 inches (30 mm)
- Output Shaft Diameter
- 1.38 inches (35 mm)
- Fluid Capacity
- 9.5 quarts (9 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Composite friction materials
- Seals
- Nitrile rubber
Features
- Electronic Control
-
- Adaptive shift control
- Manual mode override
- Torque converter lockup
- Fail-safe mode
- Drivetrain Integration
-
- Full-time all-wheel drive
- Center differential lock
- Viscous limited-slip differential
- Transfer clutch control
- Performance
-
- Smooth shift transitions
- Optimized gear ratios
- Reduced power loss
- Enhanced fuel efficiency
- Durability
-
- Reinforced gear train
- High-capacity cooling system
- Heavy-duty torque converter
- Sealed bearing units
- Safety
-
- Overheat protection
- Low fluid warning
- Shift interlock system
- Neutral safety switch
Safety Features
- Electronic Protection
-
- Over-rev protection
- Overheat shutdown
- Low fluid pressure warning
- Mechanical Safety
-
- Parking pawl lock
- Shift interlock system
- Neutral safety switch
- Driver Assistance
-
- Fail-safe mode activation
- Adaptive shift control
- Torque converter lockup
Comfort Features
- Shift Quality
-
- Smooth gear transitions
- Adaptive shift patterns
- Reduced shift shock
- Noise Reduction
-
- Precision gear meshing
- Vibration dampening
- Sealed bearing units
- Climate Control
-
- Integrated transmission cooler
- Thermostatic fluid control
- High-capacity cooling system
- Driver Control
-
- Manual mode override
- Sport mode selection
- Adaptive shift logic
Accessories
- Cooling
-
- Transmission cooler kit
- Thermostatic valve
- High-capacity radiator
- Performance
-
- Shift kit
- Torque converter upgrade
- Synthetic transmission fluid
- Maintenance
-
- Transmission filter kit
- Fluid exchange kit
- Seal replacement kit
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Fluid and filter replacement
- Seal inspection
- Shift linkage adjustment
- Electronic control system check
- Cooling system inspection
- Maintenance Notes
- Use only Subaru-approved ATF fluid for optimal performance and longevity.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Parts and labor
- Powertrain
- Miles: 60,000Years: 5Coverage: Transmission components
- Corrosion
- Miles: UnlimitedYears: 5Coverage: Casing and external components
- Emissions
- Miles: 80,000Years: 8Coverage: Electronic control systems
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Precision CNC machining
- Heat treatment of gears
- Automated assembly
- Quality control testing
- Quality Control
- Dimensional Checks: 100% inspectionPerformance Testing: Dyno testingLeak Testing: Pressure and vacuum testing
- Sustainability Practices
-
- Recycled aluminum usage
- Eco-friendly manufacturing
- Waste reduction programs
- Production Metrics
- Annual Output: 150,000 unitsDefect Rate: 0.02%Production Time: 4 hours per unit
Service Information for 4eat transmission Service
Maintenance and service requirements specific to this component
- Transmission fluid replacement
- Filter replacement
- Seal inspection
- Shift linkage adjustment
- Electronic control system check
Use only Subaru-approved ATF fluid for optimal performance.
- Complete fluid flush
- Cooling system inspection
- Torque converter check
- Clutch pack inspection
- Shift solenoid testing
Special tools required for solenoid testing and torque converter inspection.
- Transmission overhaul
- Clutch pack replacement
- Seal and gasket replacement
- Bearing inspection
- Performance testing
Critical to replace all seals and gaskets during major service to prevent leaks.
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 1997-2002 Subaru Forester is specifically designed for this model and may not be directly compatible with other Subaru vehicles without modifications. It is essential to verify the transmission model number and consult with a Subaru specialist to ensure compatibility. The 4EAT is a 4-speed automatic transmission known for its durability and smooth operation in the Forester.
Q2 What are the maintenance requirements for the 4EAT transmission?
What are the maintenance requirements for the 4EAT transmission?
Regular maintenance of the 4EAT transmission includes checking and replacing the transmission fluid every 30,000 to 60,000 miles, depending on driving conditions. Inspect for leaks, ensure the transmission cooler is functioning properly, and replace the filter if necessary. Adhering to the manufacturer’s maintenance schedule will help prolong the transmission’s lifespan and ensure optimal performance.
Q3 How do I replace the 4EAT transmission in a 1997-2002 Subaru Forester?
How do I replace the 4EAT transmission in a 1997-2002 Subaru Forester?
To replace the 4EAT transmission, start by disconnecting the battery and draining the transmission fluid. Remove the driveshaft, exhaust system, and crossmember. Disconnect electrical connectors, shift linkage, and the torque converter. Carefully lower the transmission using a jack and replace it with the new unit. Reassemble all components, refill with transmission fluid, and test for proper operation. Professional assistance is recommended.
Q4 What are common troubleshooting steps for 4EAT transmission issues?
What are common troubleshooting steps for 4EAT transmission issues?
Common issues with the 4EAT transmission include slipping, delayed engagement, and fluid leaks. Start by checking the transmission fluid level and condition. Inspect for leaks and damaged components. Use an OBD-II scanner to read error codes. If the problem persists, consult a professional for further diagnosis, as internal repairs may be required.
Q5 How can I optimize the performance of the 4EAT transmission?
How can I optimize the performance of the 4EAT transmission?
To optimize the 4EAT transmission, use high-quality transmission fluid and ensure it is at the correct level. Regularly inspect and maintain the transmission cooler. Avoid harsh driving conditions and excessive towing. Consider upgrading the torque converter or adding an aftermarket transmission cooler for improved performance and durability.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1997-2002 Subaru Forester Service Manual
Coming SoonThis comprehensive service manual provides detailed instructions for maintenance, repair, and troubleshooting of the 1997-2002 Subaru Forester, including the 4EAT transmission.
4EAT Transmission Technical Bulletin
Coming SoonThis technical bulletin outlines updates, known issues, and solutions for the 4EAT transmission used in the 1997-2002 Subaru Forester.
Subaru Forester Parts and Accessories Guide
Coming SoonThis guide provides a detailed list of compatible parts and accessories for the 1997-2002 Subaru Forester, 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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