Lexus ES 2002-2006 U151 Transmission Specifications
This document provides detailed technical specifications for the U151 transmission used in the 2002-2006 Lexus ES 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 U151 transmission's design and operation.
Overview Specifications
This document provides detailed specifications and technical information about the u151 transmission used in the 2002-2006 Lexus ES models. It is designed to assist technicians, 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 the sections for a comprehensive understanding of the u151 transmission.
How to Use
Use the search bar to enter keywords related to the u151 transmission, such as 'gear ratios' or 'fluid capacity'. The search results will highlight relevant sections and subsections for quick access.
Navigate through the document by clicking on the section titles in the table of contents. Each section is organized into subsections with detailed technical points for easy reference.
Key Specifications
Transmission Type
5-speed automatic
Gear Ratios
3.538:1 to 0.713:1
Fluid Capacity
7.5 quarts
Weight
145 lbs
Service Interval
60,000 miles
Available Specifications
Transmission Design
This section covers the design and engineering of the u151 transmission, including its construction, components, and layout. It provides insights into how the transmission is integrated into the Lexus ES models and its role in vehicle performance.
Transmission Design
This section covers the design and engineering of the u151 transmission, including its construction, components, and layout. It provides insights into how the transmission is integrated into the Lexus ES models and its role in vehicle performance.
Construction and Materials
- Aluminum alloy casing for reduced weight
- Precision-machined gears for durability
- Sealed bearings for reduced maintenance
- Integrated torque converter for smooth power delivery
Layout and Integration
- Front-wheel-drive configuration
- Compact design for efficient space utilization
- Direct connection to the engine via a flexplate
- Electronically controlled shift mechanisms
Performance Specifications
This section outlines the performance characteristics of the u151 transmission, including gear ratios, shift patterns, and efficiency metrics. It is essential for understanding how the transmission contributes to the Lexus ES's driving dynamics.
Performance Specifications
This section outlines the performance characteristics of the u151 transmission, including gear ratios, shift patterns, and efficiency metrics. It is essential for understanding how the transmission contributes to the Lexus ES's driving dynamics.
Gear Ratios
- 1st gear: 3.538:1
- 2nd gear: 2.060:1
- 3rd gear: 1.404:1
- 4th gear: 1.000:1
- 5th gear: 0.713:1
- Reverse gear: 3.168:1
Shift Patterns
- Smooth, adaptive shifting for comfort
- Sport mode for quicker gear changes
- Manual shift override capability
- Downshift rev-matching for performance
Maintenance and Service
This section provides guidelines for maintaining and servicing the u151 transmission. It includes information on fluid requirements, inspection intervals, and common troubleshooting tips.
Maintenance and Service
This section provides guidelines for maintaining and servicing the u151 transmission. It includes information on fluid requirements, inspection intervals, and common troubleshooting tips.
Fluid Requirements
- Recommended fluid: Toyota WS ATF
- Fluid capacity: 7.5 quarts (with torque converter)
- Fluid change interval: Every 60,000 miles
- Use of genuine fluid for optimal performance
Inspection and Troubleshooting
- Regular inspection of fluid levels and condition
- Check for leaks around seals and gaskets
- Diagnose shift hesitation with OBD-II scanner
- Replace worn components promptly
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Transmission Specifications
Overview
- Type
- Automatic
- Configuration
- Front-wheel drive
- Platform
- Toyota K platform
- Material
- Aluminum alloy casing
- Location
- Front-mounted
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
- 7.5 quarts (7.1 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Composite friction materials
- Seals
- Viton rubber
Features
- Transmission Control
-
- Electronic control unit (ECU)
- Adaptive shift control
- Manual mode with paddle shifters
- Performance
-
- 5-speed automatic
- Smooth shift technology
- Lock-up torque converter
- Efficiency
-
- Optimized gear ratios
- Reduced internal friction
- Eco-mode for fuel efficiency
- Durability
-
- Reinforced gear train
- High-temperature resistant materials
- Sealed for life design
- integration
-
- Compatible with VVT-i engines
- Integrated with vehicle stability control
- Seamless integration with hybrid systems (if applicable)
Safety Features
- Fail Safe Mode
-
- Limp-home mode
- Overheat protection
- Electronic Protection
-
- Shift lock control
- Reverse lockout
- Mechanical Protection
-
- Overload protection
- Torque limiter
Comfort Features
- Shift Quality
-
- Smooth transitions
- Reduced shift shock
- Noise Reduction
-
- Sound dampening materials
- Precision gear meshing
- Driving Modes
-
- Eco mode
- Sport mode
- Winter mode
- User interface
-
- Gear position display
- Shift indicator
Accessories
- Transmission Fluids
-
- Toyota WS ATF
- Synthetic ATF
- High-mileage ATF
- Cooling Systems
-
- Transmission cooler
- Auxiliary cooler
- Thermostatic valve
- Mounts And Bushings
-
- Polyurethane mounts
- Rubber bushings
- Reinforced brackets
Maintenance
- Service interval
- Every 60,000 miles or 60 months
- Service Items
-
- Fluid and filter change
- Inspect for leaks
- Check shift linkage
- Inspect mounts and bushings
- Test electronic controls
- Maintenance Notes
- Use only recommended fluids and follow torque specifications for all components.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain
- Miles: 60,000Years: 5Coverage: Transmission and drivetrain
- Corrosion
- Miles: UnlimitedYears: 5Coverage: Perforation from rust
- Emissions
- Miles: 80,000Years: 8Coverage: Emissions-related components
Production Details
- Manufacturer
- Aisin Seiki Co., Ltd.
- Manufacturing Process
-
- Precision casting
- CNC machining
- Automated assembly
- Quality Control
- inspection: 100% component testingTesting: Dyno and road simulationCertification: ISO 9001
- Sustainability Practices
-
- Recycled materials
- Energy-efficient production
- Waste reduction programs
- Production Metrics
- Units Per Year: 500,000Defect Rate: < 0.1%Lead Time: 4 weeks
Service Information for u151 transmission Service
Maintenance and service requirements specific to this component
- Inspect transmission fluid level and condition
- Check for leaks
- Inspect shift linkage and mounts
- Test electronic control functions
Early detection of issues can prevent major repairs.
- Replace transmission fluid and filter
- Inspect and adjust shift linkage
- Check and tighten all mounts
- Test transmission control module
Use only manufacturer-recommended fluids and parts.
- Complete transmission fluid flush
- Inspect and replace worn bushings and mounts
- Check and replace seals if necessary
- Perform full diagnostic scan
Major service interval; consider professional inspection.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the u151 transmission compatible with other Lexus models?
Is the u151 transmission compatible with other Lexus models?
The u151 transmission is specifically designed for the 2002-2006 Lexus ES models. While it shares some design similarities with other Lexus transmissions, it is not directly compatible with other models due to differences in mounting points, electronic controls, and gear ratios. Always verify compatibility with your vehicle's VIN before attempting any installation.
Q2 What are the maintenance requirements for the u151 transmission?
What are the maintenance requirements for the u151 transmission?
The u151 transmission requires regular maintenance to ensure optimal performance. This includes fluid changes every 60,000 miles, inspection of the transmission pan and filter, and checking for leaks or unusual noises. Use only Lexus-approved ATF WS fluid. Regular software updates from a Lexus dealer are also recommended to maintain smooth shifting and performance.
Q3 How do I replace the u151 transmission in my Lexus ES?
How do I replace the u151 transmission in my Lexus ES?
Replacing the u151 transmission involves several steps: disconnect the battery, remove the driveshaft, unbolt the transmission mounts, and disconnect the wiring harness and shift linkage. Lower the transmission using a jack and replace it with a new or refurbished unit. Reassemble in reverse order, ensuring all bolts are torqued to factory specifications. A professional mechanic is recommended for this task.
Q4 What should I do if my u151 transmission is slipping or shifting roughly?
What should I do if my u151 transmission is slipping or shifting roughly?
If your u151 transmission is slipping or shifting roughly, start by checking the transmission fluid level and condition. Low or contaminated fluid can cause these issues. Inspect for leaks, and ensure the fluid is topped up with Lexus ATF WS. If the problem persists, a diagnostic scan for error codes is recommended. Common fixes include replacing the solenoid pack or performing a transmission software update.
Q5 How can I optimize the performance of my u151 transmission?
How can I optimize the performance of my u151 transmission?
To optimize the performance of your u151 transmission, ensure regular fluid changes with Lexus ATF WS, keep the transmission software updated, and avoid aggressive driving habits. Installing an aftermarket transmission cooler can help reduce heat buildup, extending the lifespan of the transmission. Regularly inspect and replace worn components like mounts and bushings to maintain smooth operation.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2002-2006 Lexus ES Transmission Service Manual
Coming SoonThis manual provides detailed instructions for servicing and repairing the u151 transmission, including torque specifications, fluid requirements, and diagnostic procedures.
Technical Service Bulletin for u151 Transmission Software Update
Coming SoonThis bulletin outlines a software update for the u151 transmission to address shifting issues and improve performance. Includes installation instructions and compatibility details.
Lexus ES Transmission Parts Catalog
Coming SoonA comprehensive catalog of OEM and aftermarket parts for the u151 transmission, including gaskets, seals, solenoids, and fluid recommendations.
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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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