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Jeep Wrangler 1987-1995 AX5 Transmission Specifications
This document provides detailed technical specifications for the AX5 transmission used in the 1987-1995 Jeep Wrangler (YJ). It includes gear ratios, torque capacity, fluid requirements, and compatibility details. The AX5 is a 5-speed manual transmission designed for light-duty off-road and on-road use, commonly paired with the 2.5L inline-4 engine. This guide is essential for mechanics, enthusiasts, and restorers seeking to understand, maintain, or repair the AX5 transmission. It also covers common issues, troubleshooting tips, and upgrade options to enhance performance. Whether you're performing routine maintenance or a complete rebuild, this resource ensures accurate and reliable information for your Jeep Wrangler project.
Overview Specifications
This document provides detailed specifications and technical information about the AX5 transmission used in the 1987-1995 Jeep Wrangler. It is designed to assist mechanics, enthusiasts, and owners in understanding the transmission's features, maintenance, and performance. Use the search and navigation instructions to quickly find relevant details. The document is divided into sections covering design, operation, maintenance, and troubleshooting.
How to Use
Use the search bar to enter keywords related to the AX5 transmission, such as 'gear ratios' or 'fluid capacity'. Results will highlight relevant sections and subsections for quick access.
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
Torque Capacity
240 lb-ft
Fluid Capacity
2.2 quarts
Gear Ratios
3.93:1 (1st)
Weight
75 lbs
Available Specifications
Design and Construction
This section covers the design features and construction details of the AX5 transmission. Learn about its materials, layout, and key components that contribute to its durability and performance.
Design and Construction
This section covers the design features and construction details of the AX5 transmission. Learn about its materials, layout, and key components that contribute to its durability and performance.
Transmission Layout
- 5-speed manual transmission
- Aluminum alloy housing for reduced weight
- Synchronized forward gears for smooth shifting
- Rear-wheel drive configuration
- Compact design for off-road applications
- Integrated bell housing for easy installation
Key Components
- High-strength steel gears for durability
- Needle roller bearings for reduced friction
- Hydraulic clutch system for smooth engagement
- Dual-cone synchronizers for 1st and 2nd gears
- Sealed input and output shafts for protection
- Magnetic drain plug for debris collection
Performance Specifications
Explore the performance characteristics of the AX5 transmission, including gear ratios, torque capacity, and operational limits. This section provides essential data for understanding its capabilities.
Performance Specifications
Explore the performance characteristics of the AX5 transmission, including gear ratios, torque capacity, and operational limits. This section provides essential data for understanding its capabilities.
Gear Ratios
- 1st gear: 3.93:1
- 2nd gear: 2.33:1
- 3rd gear: 1.45:1
- 4th gear: 1.00:1
- 5th gear: 0.85:1
- Reverse gear: 4.74:1
Torque and Load Capacity
- Maximum torque capacity: 240 lb-ft
- Designed for engines up to 4.0L inline-6
- Suitable for light to moderate off-road use
- Operational temperature range: -40°F to 250°F
- Recommended fluid: 75W-90 GL-4 gear oil
- Fluid capacity: 2.2 quarts
Maintenance and Troubleshooting
This section provides guidelines for maintaining the AX5 transmission and troubleshooting common issues. Follow these recommendations to ensure longevity and optimal performance.
Maintenance and Troubleshooting
This section provides guidelines for maintaining the AX5 transmission and troubleshooting common issues. Follow these recommendations to ensure longevity and optimal performance.
Routine Maintenance
- Check fluid level every 15,000 miles
- Replace transmission fluid every 30,000 miles
- Inspect for leaks around seals and gaskets
- Lubricate shift linkage annually
- Check clutch adjustment periodically
- Inspect magnetic drain plug during fluid changes
Common Issues and Solutions
- Grinding gears: Check synchronizers and fluid level
- Difficulty shifting: Inspect clutch and linkage
- Leaking fluid: Replace seals or gaskets
- Unusual noises: Check bearings and gear alignment
- Overheating: Verify fluid type and level
- Vibration: Inspect mounts and driveline components
Search Specifications
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Transmission Specifications
Overview
- Type
- Manual
- Configuration
- 5-speed
- Platform
- Jeep Wrangler (YJ)
- Material
- Cast aluminum housing
- Location
- Longitudinal, rear-wheel drive
Dimensions
- Length
- 22.5 inches (571.5 mm)
- Width
- 12.8 inches (325.1 mm)
- Height
- 10.2 inches (259.1 mm)
- Weight
- 75 lbs (34 kg)
- input Shaft Length
- 7.1 inches (180.3 mm)
- Output Shaft Length
- 10.6 inches (269.2 mm)
- Bellhousing Bolt Pattern
- 6.5 inches (165.1 mm) diameter
Materials
- Housing
- Cast aluminum
- Gears
- Hardened steel
- Synchros
- Brass
- Shafts
- Chrome-molybdenum steel
Features
- Shifting
-
- Synchronized forward gears
- Direct shift linkage
- Reverse lockout mechanism
- Durability
-
- Reinforced gear teeth
- High-capacity bearings
- Sealed lubrication system
- Performance
-
- Optimized gear ratios
- Low friction design
- Efficient power transfer
- Compatibility
-
- Fits 2.5L I4 engine
- Compatible with NP231 transfer case
- Standard Jeep Wrangler mounting points
Safety Features
- Structural
-
- Reinforced housing
- Impact-resistant design
- Operational
-
- Reverse gear lockout
- Gear position indicator
Comfort Features
- Shifting
-
- Smooth gear engagement
- Short throw shifter
- Noise Reduction
-
- Precision-machined gears
- Vibration dampening
Accessories
- Shifter
-
- Factory shifter assembly
- Aftermarket short-throw shifter
- Shift knob options
- Mounting
-
- Transmission crossmember
- Mounting brackets
- Bellhousing bolts
- Lubrication
-
- Gear oil (75W-90)
- Transmission fluid pump
- Drain and fill plugs
Maintenance
- Service interval
- 30,000 miles or 24 months
- Service Items
-
- Inspect gear oil level
- Check for leaks
- Inspect shift linkage
- Lubricate shifter mechanism
- Replace gear oil if contaminated
- Maintenance Notes
- Use only manufacturer-recommended gear oil 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: 50,000Years: 4Coverage: Emission-related components
Production Details
- Manufacturer
- Aisin-Warner
- Manufacturing Process
-
- Precision CNC machining
- Heat treatment of gears
- Automated assembly
- Quality Control
- Testing: Gear mesh analysis, Durability testing, Noise and vibration testinginspection: Dimensional accuracy, Surface finish, Material hardness
- Sustainability
-
- Recyclable materials
- Energy-efficient manufacturing
- Waste reduction programs
- Production Metrics
- Units Per Day: 500Defect Rate: 0.5%Lead Time: 4 weeks
Service Information for ax5 transmission Service
Maintenance and service requirements specific to the AX5 transmission
- Inspect gear oil level
- Check for leaks
- Inspect shift linkage
- Lubricate shifter mechanism
- Replace gear oil if contaminated
Use only manufacturer-recommended gear oil for optimal performance.
- Replace gear oil
- Inspect synchros
- Check bearing wear
- Test shift smoothness
- Inspect input and output shafts
Special tools may be required for synchro inspection.
- Complete transmission overhaul
- Replace worn gears
- Inspect and replace bearings
- Check housing for cracks
- Test all seals and gaskets
Major service should be performed by a certified technician.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the AX5 transmission compatible with all 1987-1995 Jeep Wrangler models?
Is the AX5 transmission compatible with all 1987-1995 Jeep Wrangler models?
The AX5 transmission is compatible with 1987-1995 Jeep Wrangler models equipped with the 2.5L 4-cylinder engine. It is not compatible with models featuring the 4.0L inline-6 engine, which uses the AX15 transmission. Ensure your vehicle's engine type matches the transmission specifications before installation.
Q2 What are the maintenance requirements for the AX5 transmission?
What are the maintenance requirements for the AX5 transmission?
The AX5 transmission requires regular maintenance, including fluid changes every 30,000 miles using 75W-90 GL-5 gear oil. Inspect for leaks, worn seals, and synchro wear periodically. Proper lubrication and timely repairs are essential to extend the transmission's lifespan and maintain optimal performance.
Q3 How do I install or replace the AX5 transmission in my Jeep Wrangler?
How do I install or replace the AX5 transmission in my Jeep Wrangler?
To install or replace the AX5 transmission, disconnect the battery, remove the driveshafts, and unbolt the transmission crossmember. Detach the clutch linkage, shift lever, and wiring harness. Lower the transmission carefully using a jack. Install the new transmission by reversing the steps, ensuring proper alignment and torque specifications.
Q4 What should I do if my AX5 transmission is making grinding noises?
What should I do if my AX5 transmission is making grinding noises?
Grinding noises in the AX5 transmission often indicate worn synchros or insufficient lubrication. Check the gear oil level and quality. If the issue persists, inspect the synchros and gears for wear. Replacing damaged components or performing a complete rebuild may be necessary to resolve the problem.
Q5 How can I optimize the performance of my AX5 transmission?
How can I optimize the performance of my AX5 transmission?
To optimize AX5 transmission performance, use high-quality 75W-90 GL-5 gear oil and ensure proper fluid levels. Avoid aggressive shifting and excessive load. Regularly inspect and replace worn components like synchros and seals. Upgrading to a heavy-duty clutch can also improve durability and performance.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Jeep Wrangler AX5 Transmission Service Manual
Coming SoonDetailed service manual covering installation, maintenance, and troubleshooting for the AX5 transmission.
AX5 Transmission Technical Service Bulletin
Coming SoonTechnical bulletin addressing common issues and updates for the AX5 transmission in 1987-1995 Jeep Wranglers.
Jeep Wrangler AX5 Parts and Accessories Catalog
Coming SoonComprehensive catalog of replacement parts and accessories for the AX5 transmission.
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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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