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Jeep Wrangler 1997-2006 42RE Transmission Specifications
This document provides detailed technical specifications for the 42RE automatic transmission used in the 1997-2006 Jeep Wrangler. It includes critical data such as gear ratios, torque converter specifications, fluid capacity, and shift points. These specifications are essential for mechanics, enthusiasts, and owners performing maintenance, repairs, or upgrades. The guide also covers compatibility details, common issues, and performance tuning tips. Whether you're diagnosing a transmission problem or planning an upgrade, this resource offers valuable insights to ensure optimal performance and longevity of your Jeep Wrangler's 42RE transmission.
Overview Specifications
This document provides detailed specifications and technical information about the 42RE automatic transmission used in 1997-2006 Jeep Wrangler models. It is designed to assist mechanics, enthusiasts, and owners in understanding the transmission's design, operation, and maintenance. Use this guide to locate specific details, troubleshoot issues, and ensure proper care of the 42RE transmission.
How to Use
Use the search functionality to quickly locate specific terms or topics within the document. Enter keywords related to the 42RE transmission, such as 'torque converter' or 'fluid capacity,' to find relevant sections.
Navigate through the document using the table of contents or section headers. Each major section is divided into subsections with detailed technical points for easy reference.
Key Specifications
Transmission Type
4-speed automatic
Max Torque Capacity
300 lb-ft
Weight
150 lbs
Fluid Capacity
12 quarts
Gear Ratios
2.74:1 to 0.69:1
Available Specifications
Transmission Design and Components
This section covers the structural and functional components of the 42RE transmission, including its gear ratios, torque converter, and valve body. Learn about the transmission's internal mechanisms and how they contribute to its performance.
Transmission Design and Components
This section covers the structural and functional components of the 42RE transmission, including its gear ratios, torque converter, and valve body. Learn about the transmission's internal mechanisms and how they contribute to its performance.
Gear Ratios and Shifting
- First gear ratio: 2.74:1
- Second gear ratio: 1.54:1
- Third gear ratio: 1.00:1
- Overdrive ratio: 0.69:1
- Reverse gear ratio: 2.21:1
- Electronic shift control for smooth transitions
Torque Converter Specifications
- Stall speed: 1800-2200 RPM
- Lock-up clutch for improved efficiency
- Diameter: 11.75 inches
- Sealed design to prevent fluid leaks
Maintenance and Service
This section provides guidelines for maintaining and servicing the 42RE transmission. It includes information on fluid requirements, filter replacement, and common troubleshooting steps to ensure longevity and reliability.
Maintenance and Service
This section provides guidelines for maintaining and servicing the 42RE transmission. It includes information on fluid requirements, filter replacement, and common troubleshooting steps to ensure longevity and reliability.
Fluid Specifications
- Recommended fluid: ATF+4
- Fluid capacity: 12 quarts (including torque converter)
- Fluid change interval: Every 30,000 miles
- Use of incorrect fluid can cause damage
Filter Replacement
- Replace filter every 60,000 miles
- Use OEM or high-quality aftermarket filters
- Inspect for debris during replacement
- Ensure proper sealing of the filter housing
Common Issues and Troubleshooting
This section addresses common problems associated with the 42RE transmission and provides troubleshooting tips to diagnose and resolve issues effectively.
Common Issues and Troubleshooting
This section addresses common problems associated with the 42RE transmission and provides troubleshooting tips to diagnose and resolve issues effectively.
Shift Delays or Harsh Shifting
- Check fluid level and condition
- Inspect valve body for wear or damage
- Test solenoid operation
- Verify throttle position sensor calibration
Transmission Overheating
- Inspect cooling lines for blockages
- Check radiator transmission cooler
- Ensure proper fluid level and quality
- Avoid excessive towing or heavy loads
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Transmission Specifications
Overview
- Type
- Automatic
- Configuration
- 4-speed overdrive
- Platform
- Jeep Wrangler TJ (1997-2006)
- Material
- Aluminum casing with steel internals
- Location
- Longitudinal, rear-wheel drive configuration
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 22.8 inches (579 mm)
- Height
- 18.3 inches (465 mm)
- Weight
- 135 lbs (61.2 kg)
- input Shaft Length
- 7.2 inches (183 mm)
- Output Shaft Length
- 10.5 inches (267 mm)
- Fluid Capacity
- 7.4 quarts (7 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Composite friction materials
- Seals
- Viton rubber
- Bearings
- High-carbon steel
Features
- Shifting
-
- Electronic shift control
- Adaptive shift logic
- Torque converter lockup
- Overdrive engagement
- Cooling
-
- Integrated transmission cooler
- Fluid temperature sensor
- Auxiliary cooler compatibility
- Durability
-
- Reinforced clutch packs
- Heavy-duty output shaft
- High-strength planetary gears
- Performance
-
- Smooth shift transitions
- Optimized gear ratios
- Low-speed torque multiplication
- Compatibility
-
- 4.0L inline-6 engine
- NP231 transfer case
- Jeep TJ chassis
Safety Features
- Electronic Protections
-
- Overheat protection
- Overload detection
- Fail-safe mode
- Mechanical Protections
-
- Shear-resistant output shaft
- Reinforced bell housing
- Fluid Management
-
- Sealed fluid system
- High-capacity filter
Comfort Features
- Noise Reduction
-
- Precision gear meshing
- Vibration dampening mounts
- Shift Quality
-
- Smooth engagement
- Adaptive shift timing
- Drivability
-
- Optimized gear ratios
- Low-speed crawl capability
Accessories
- Cooling
-
- Auxiliary transmission cooler
- Temperature gauge
- Cooler lines
- Performance
-
- Shift kit
- Heavy-duty torque converter
- Upgraded clutch packs
- Maintenance
-
- Fluid exchange kit
- Filter replacement kit
- Seal kit
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Fluid and filter replacement
- Seal inspection
- Shift linkage adjustment
- Cooler line inspection
- Torque converter inspection
- Notes
- Use only ATF+4 transmission fluid for optimal performance.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Parts and labor
- Powertrain
- Miles: 60,000Years: 5Coverage: Transmission internals
- Corrosion
- Miles: 100,000Years: 7Coverage: Casing and seals
- Extended
- Miles: 100,000Years: 7Coverage: Optional extended coverage
Production Details
- Manufacturer
- Chrysler Corporation
- Manufacturing Process
-
- Precision CNC machining
- Heat treatment of gears
- Automated assembly
- Quality Control
- Testing: Dyno testing, Pressure testing, Shift calibrationStandards: ISO 9001 certified, Chrysler quality standards
- Sustainability
-
- Recyclable materials
- Low-emission manufacturing
- Energy-efficient processes
- Production Metrics
- Units Per Year: Approximately 50,000Defect Rate: Less than 0.5%
Service Information for 42re transmission Service
Maintenance and service requirements specific to this component
- Replace transmission fluid
- Replace filter
- Inspect seals and gaskets
- Check shift linkage
- Inspect cooler lines
Use only ATF+4 fluid for replacement.
- Flush transmission system
- Inspect torque converter
- Check electronic controls
- Test shift quality
- Inspect mounts
Perform electronic diagnostics if issues are detected.
- Overhaul transmission
- Replace clutch packs
- Inspect planetary gears
- Replace seals and gaskets
- Test fluid pressure
Major service requires specialized tools and expertise.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 42RE transmission compatible with all 1997-2006 Jeep Wrangler models?
Is the 42RE transmission compatible with all 1997-2006 Jeep Wrangler models?
The 42RE transmission is compatible with select 1997-2006 Jeep Wrangler models, specifically those equipped with the 4.0L inline-6 engine. It is not compatible with models featuring the 2.5L engine or later models with different transmission configurations. Always verify your vehicle's specifications before purchasing or installing a 42RE transmission.
Q2 What are the maintenance requirements for the 42RE transmission?
What are the maintenance requirements for the 42RE transmission?
The 42RE transmission requires regular maintenance, including fluid and filter changes every 30,000 to 50,000 miles. Inspect for leaks, ensure proper fluid levels, and check for wear on internal components. Regular servicing helps prevent overheating and extends the transmission's lifespan. Use only manufacturer-recommended fluids for optimal performance.
Q3 How do I install or replace the 42RE transmission in my Jeep Wrangler?
How do I install or replace the 42RE transmission in my Jeep Wrangler?
To install or replace the 42RE transmission, first disconnect the battery and remove the driveshaft, exhaust, and crossmember. Support the transmission with a jack, disconnect the torque converter and wiring, then lower and remove the transmission. Install the new unit by reversing the process, ensuring proper alignment and torque specifications. Consult a service manual for detailed instructions.
Q4 What should I do if my 42RE transmission is slipping or not shifting properly?
What should I do if my 42RE transmission is slipping or not shifting properly?
If your 42RE transmission is slipping or not shifting properly, check the fluid level and condition first. Low or contaminated fluid can cause issues. Inspect for leaks, damaged wiring, or faulty sensors. If problems persist, perform a diagnostic scan to identify error codes. Common solutions include replacing the solenoid pack, adjusting the bands, or rebuilding the transmission.
Q5 How can I optimize the performance of my 42RE transmission?
How can I optimize the performance of my 42RE transmission?
To optimize the 42RE transmission's performance, use high-quality transmission fluid and ensure proper fluid levels. Regularly inspect and replace the filter. Consider upgrading the cooler to prevent overheating. Avoid aggressive driving and ensure the engine is tuned properly. These steps help maintain smooth shifting and extend the transmission's lifespan.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1997-2006 Jeep Wrangler 42RE Transmission Service Manual
Coming SoonThis manual provides detailed instructions for servicing, repairing, and maintaining the 42RE transmission in 1997-2006 Jeep Wrangler models.
Technical Service Bulletin for 42RE Transmission Updates
Coming SoonThis bulletin outlines common issues, updates, and fixes for the 42RE transmission in Jeep Wrangler models from 1997 to 2006.
Jeep Wrangler 42RE Transmission Parts Catalog
Coming SoonThis catalog lists all compatible parts and accessories for the 42RE transmission, including gaskets, filters, and rebuild kits.
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Important information about using this content
Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.
General Information
Warranty & Liability
The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.
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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