Lexus RX 1999-2003 U140E Transmission Specifications
This document provides detailed technical specifications for the u140e transmission used in the 1999-2003 Lexus RX models. It includes information on gear ratios, torque capacity, fluid requirements, and maintenance intervals. These specifications are essential for mechanics, enthusiasts, and owners seeking to understand the transmission's performance, diagnose issues, or perform upgrades. The data is sourced from factory service manuals and technical bulletins, ensuring accuracy and reliability. Whether you're performing routine maintenance, troubleshooting, or planning modifications, this resource offers valuable insights into the u140e transmission's design and operation.
Overview Specifications
This document provides detailed technical specifications and operational insights for the U140E transmission used in the 1999-2003 Lexus RX models. It is designed to assist mechanics, enthusiasts, and owners in understanding the transmission's design, functionality, and maintenance requirements. Use this guide to navigate through sections, search for specific details, and reference key specifications quickly.
How to Use
Use the search functionality to locate specific terms or topics within the document. Enter keywords related to the U140E transmission, such as 'gear ratios' or 'fluid capacity,' to find relevant information instantly.
Navigate through the document using the section titles and subsections. Each major section is organized into detailed subsections, making it easy to find specific technical details about the U140E transmission.
Key Specifications
Transmission Type
4-speed automatic
Gear Ratios
2.804:1 to 0.705:1
Torque Capacity
245 lb-ft
Fluid Capacity
7.5 quarts
Compatibility
FWD/AWD
Available Specifications
Transmission Design and Components
This section covers the structural design and key components of the U140E transmission. Learn about the transmission's construction, materials, and the role of each component in ensuring smooth operation.
Transmission Design and Components
This section covers the structural design and key components of the U140E transmission. Learn about the transmission's construction, materials, and the role of each component in ensuring smooth operation.
Gear Configuration
- 4-speed automatic transmission
- Front-wheel drive (FWD) and all-wheel drive (AWD) compatibility
- Planetary gearset design for compactness
- Hydraulic control system for gear shifts
Key Components
- Torque converter with lock-up clutch
- Valve body for hydraulic pressure regulation
- Input and output shafts for power transfer
- Seals and gaskets for fluid containment
Performance Specifications
Explore the performance metrics of the U140E transmission, including gear ratios, torque capacity, and shift response. This section provides insights into how the transmission enhances the driving experience.
Performance Specifications
Explore the performance metrics of the U140E transmission, including gear ratios, torque capacity, and shift response. This section provides insights into how the transmission enhances the driving experience.
Gear Ratios
- 1st gear: 2.804:1
- 2nd gear: 1.531:1
- 3rd gear: 1.000:1
- 4th gear: 0.705:1
- Reverse gear: 2.393:1
Torque Handling
- Maximum torque capacity: 245 lb-ft
- Designed for smooth torque delivery
- Optimized for V6 engine compatibility
- Durable clutch packs for high torque loads
Maintenance and Troubleshooting
This section provides guidelines for maintaining the U140E transmission and troubleshooting common issues. Learn about fluid requirements, service intervals, and diagnostic tips.
Maintenance and Troubleshooting
This section provides guidelines for maintaining the U140E transmission and troubleshooting common issues. Learn about fluid requirements, service intervals, and diagnostic tips.
Fluid Requirements
- Recommended fluid: Toyota Type T-IV ATF
- Fluid capacity: 7.5 quarts (approx.)
- Fluid change interval: 60,000 miles
- Use of incorrect fluid can damage the transmission
Common Issues
- Delayed or harsh shifting
- Transmission fluid leaks
- Torque converter shudder
- Check engine light due to transmission codes
Search Specifications
Search by specification name, value, or description
Type to search through torque specifications. Results will appear below as you type.
Transmission Specifications
Overview
- Type
- Automatic Transmission
- Configuration
- 5-speed
- Platform
- Front-wheel drive (FWD) / All-wheel drive (AWD)
- Material
- Aluminum casing with steel internals
- Location
- Mounted longitudinally in the engine bay
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
- 1.2 inches (30.5 mm)
- Output Shaft Diameter
- 1.5 inches (38.1 mm)
- Fluid Capacity
- 7.4 quarts (7 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Composite friction materials
- Seals
- Viton rubber
- Cooling Lines
- Steel with rubber hoses
Features
- Shifting
-
- Electronic shift control
- Adaptive shift logic
- Manual mode with paddle shifters (optional)
- Smooth torque converter engagement
- Cooling
-
- Integrated transmission cooler
- Auxiliary cooler for towing
- Temperature monitoring system
- Durability
-
- Reinforced gear sets
- High-capacity clutch packs
- Sealed bearings for longevity
- Performance
-
- Optimized gear ratios for fuel efficiency
- Quick shift response
- Low friction design
- integration
-
- Compatible with VSC (Vehicle Stability Control)
- Integrated with ECU for adaptive learning
- Seamless integration with AWD system
Safety Features
- Fail Safe
-
- Limp-home mode
- Overheat protection
- Fluid pressure monitoring
- Electronic Controls
-
- Shift lock system
- Parking pawl safety lock
- Neutral safety switch
Comfort Features
- Noise Reduction
-
- Precision gear machining
- Vibration dampening mounts
- Quiet torque converter design
- Smoothness
-
- Adaptive shift smoothing
- Low-speed creep control
- Seamless gear transitions
- Convenience
-
- Automatic park engagement
- Hill-start assist
- Tow/haul mode
Accessories
- Cooling
-
- Transmission cooler kit
- Auxiliary fan
- Temperature gauge
- Performance
-
- Shift improvement kit
- High-capacity fluid pan
- Upgraded clutch packs
- Maintenance
-
- Fluid exchange kit
- Filter replacement kit
- Seal repair kit
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Transmission fluid replacement
- Filter replacement
- Seal inspection
- Shift linkage adjustment
- Cooling system check
- Notes
- Use only Toyota Type T-IV or equivalent transmission fluid.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain
- Miles: 60,000Years: 5Coverage: Transmission and drivetrain components
- Corrosion
- Miles: UnlimitedYears: 5Coverage: Perforation only
- Emissions
- Miles: 50,000Years: 4Coverage: Federal emissions components
Production Details
- Manufacturer
- Aisin Seiki Co., Ltd.
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser alignment
- Quality Control
- inspection: 100% component testingTesting: Dyno performance validationStandards: ISO 9001 certified
- Sustainability
-
- Recycled aluminum usage
- Low-emission manufacturing
- Waste reduction initiatives
- Production Metrics
- Units Per Year: Approximately 500,000Defect Rate: Less than 0.1%Lead Time: 4 weeks
Service Information for u140e transmission Service
Maintenance and service requirements specific to this component
- Inspect transmission fluid level and condition
- Replace transmission fluid filter
- Check for leaks and seal integrity
- Inspect shift linkage and bushings
- Test transmission control module for errors
Use only manufacturer-recommended fluids and parts.
- Full transmission fluid flush
- Replace transmission pan gasket
- Inspect and clean cooling lines
- Check torque converter operation
- Test shift solenoid functionality
Special tools required for fluid exchange and solenoid testing.
- Complete transmission overhaul
- Replace clutch packs and seals
- Inspect and replace worn gears
- Rebuild torque converter
- Re-calibrate shift control module
Major service should be performed by certified technicians.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the u140e transmission compatible with other Lexus models?
Is the u140e transmission compatible with other Lexus models?
The u140e transmission is specifically designed for the 1999-2003 Lexus RX 300. While it may share similarities with other transmissions in the Aisin family, compatibility with other Lexus models is not guaranteed. Always verify part numbers and consult technical documentation or a certified technician before attempting cross-model installations.
Q2 What are the maintenance requirements for the u140e transmission?
What are the maintenance requirements for the u140e transmission?
The u140e transmission requires regular maintenance to ensure optimal performance. This includes fluid changes every 60,000 miles, inspection of the transmission pan for debris, and replacement of the filter. Additionally, check for leaks and ensure the transmission mounts are in good condition. Adhering to this schedule can prevent premature wear and costly repairs.
Q3 How do I replace the u140e transmission in a 1999-2003 Lexus RX?
How do I replace the u140e transmission in a 1999-2003 Lexus RX?
Replacing the u140e transmission involves several steps: 1) Disconnect the battery and remove the driveshaft. 2) Drain the transmission fluid and disconnect all electrical connectors and linkages. 3) Support the transmission with a jack and remove the crossmember and mounts. 4) Carefully lower the transmission and install the new unit in reverse order. Torque all bolts to factory specifications and refill with the recommended fluid.
Q4 What should I do if my u140e transmission is slipping or shifting hard?
What should I do if my u140e transmission is slipping or shifting hard?
If your u140e transmission is slipping or shifting hard, start by checking the fluid level and condition. Low or contaminated fluid can cause these issues. Inspect for leaks and replace the filter if necessary. If problems persist, use a diagnostic tool to check for error codes. Common culprits include worn clutch packs, solenoid issues, or a failing valve body. Consult a professional for further diagnosis.
Q5 How can I optimize the performance of my u140e transmission?
How can I optimize the performance of my u140e transmission?
To optimize the u140e transmission, use only manufacturer-recommended fluids and ensure proper fluid levels. Regularly inspect and replace worn components like mounts and bushings. Consider upgrading the transmission cooler for better heat dissipation, especially if towing or driving in hot climates. Avoid aggressive driving and ensure the vehicle is properly tuned to reduce strain on the transmission.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1999-2003 Lexus RX 300 Service Manual
Coming SoonComprehensive guide covering all aspects of maintenance, repair, and troubleshooting for the Lexus RX 300, including the u140e transmission.
Technical Service Bulletin for u140e Transmission
Coming SoonOfficial bulletin addressing common issues, updates, and fixes for the u140e transmission in the 1999-2003 Lexus RX 300.
Lexus RX 300 Parts and Accessories Catalog
Coming SoonDetailed catalog listing all OEM and aftermarket parts, including transmission components, for the 1999-2003 Lexus RX 300.
Legal Disclaimer
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.
Intellectual Property
About the Author
Expert automotive knowledge and experience
'/%3E%3Cpath d='M60 30a20 20 0 1 1 0 40 20 20 0 0 1 0-40zm0 45c16.5 0 30 7.5 30 16.8V100H30v-8.2c0-9.3 13.5-16.8 30-16.8z' fill='%23404040'/%3E%3C/svg%3E)
Diagnostic
Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.
Repair
Expert in both traditional mechanical repairs and modern vehicle systems.
Additional Expertise
Documentation
Created over 500 detailed repair guides and technical documents.
Training
Conducted technical training sessions and contributed to repair databases.
Certifications & Research
Certifications
- ASE Master Technician Certification
- Advanced Diagnostic Specialist
- Hybrid/Electric Vehicle Systems
- Performance Tuning Expert
Research & Community
Actively researches emerging technologies and contributes to automotive forums.