Lexus RX 2004-2009 U151 Transmission Specifications
This document provides detailed transmission specifications for the 2004-2009 Lexus RX models equipped with the U151 transmission. It includes essential technical data such as gear ratios, torque capacity, fluid type, and maintenance intervals. These specifications are crucial for understanding the transmission's performance, ensuring proper maintenance, and diagnosing potential issues. Whether you're a technician, enthusiast, or owner, this guide offers valuable insights to help you optimize the vehicle's transmission system, extend its lifespan, and maintain peak performance. Ideal for repair, upgrades, or general knowledge.
Overview Specifications
This document provides detailed specifications and technical information about the u151-transmission used in the 2004-2009 Lexus RX 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 using the table of contents or by scrolling through the sections. Each section is clearly labeled and contains subsections with detailed technical points for easy reference.
Key Specifications
Transmission Type
5-speed automatic
Maximum Torque
250 lb-ft
Fluid Capacity
7.5 quarts
Gear Ratios
3.520:1 to 0.716:1
Service Interval
60,000 miles
Available Specifications
Transmission Design
This section covers the design and architecture of the u151-transmission, including its construction, components, and integration with the Lexus RX drivetrain. Learn about the transmission's layout, materials, and engineering principles.
Transmission Design
This section covers the design and architecture of the u151-transmission, including its construction, components, and integration with the Lexus RX drivetrain. Learn about the transmission's layout, materials, and engineering principles.
Gear Configuration
- 5-speed automatic transmission
- Front-wheel drive (FWD) and all-wheel drive (AWD) variants
- Planetary gearset design for compact packaging
- Electronically controlled hydraulic system
- Optional manual shift mode
- Sealed unit for reduced maintenance
Materials and Durability
- High-strength aluminum alloy casing
- Hardened steel gears for longevity
- Advanced friction materials for smooth shifting
- Corrosion-resistant coatings
- Designed for up to 200,000 miles under normal conditions
Performance Specifications
Explore the performance metrics of the u151-transmission, including gear ratios, torque capacity, and shift response. This section provides insights into how the transmission enhances the driving experience of the Lexus RX.
Performance Specifications
Explore the performance metrics of the u151-transmission, including gear ratios, torque capacity, and shift response. This section provides insights into how the transmission enhances the driving experience of the Lexus RX.
Gear Ratios
- 1st gear: 3.520:1
- 2nd gear: 2.042:1
- 3rd gear: 1.400:1
- 4th gear: 1.000:1
- 5th gear: 0.716:1
- Reverse gear: 3.224:1
Torque Handling
- Maximum torque capacity: 250 lb-ft
- Optimized for V6 engines
- Smooth torque transfer for reduced drivetrain shock
- Adaptive shift logic for varying driving conditions
- Enhanced cooling system for sustained performance
Maintenance and Service
This section provides guidelines for maintaining and servicing the u151-transmission. Learn about fluid requirements, inspection intervals, and common troubleshooting tips to ensure optimal performance and longevity.
Maintenance and Service
This section provides guidelines for maintaining and servicing the u151-transmission. Learn about fluid requirements, inspection intervals, and common troubleshooting tips to ensure optimal performance and longevity.
Fluid Specifications
- Recommended fluid: Toyota WS ATF
- Fluid capacity: 7.5 quarts (with torque converter)
- Fluid change interval: Every 60,000 miles
- Use of synthetic fluid for improved performance
- Fluid level check procedure
Common Issues and Solutions
- Delayed shifting: Check fluid level and condition
- Transmission overheating: Inspect cooling system
- Unusual noises: Verify gear alignment and mounts
- Check engine light: Scan for transmission-related codes
- Regular inspection of seals and gaskets
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Transmission Specifications
Overview
- Type
- Automatic Transmission
- Configuration
- Front-wheel drive (FWD) / All-wheel drive (AWD)
- Platform
- Toyota K platform
- Material
- Aluminum alloy casing
- 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
- 187 lbs (85 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
- Carbon fiber composite
- Seals
- Viton rubber
- Fluid
- Toyota WS ATF
Features
- Transmission Control
-
- Electronic shift control
- Adaptive shift logic
- Manual shift mode
- Grade logic control
- Performance
-
- 5-speed automatic
- Smooth shift transitions
- Torque converter lockup
- Optimized gear ratios
- Durability
-
- Reinforced clutch packs
- High-temperature seals
- Corrosion-resistant casing
- Extended fluid life
- integration
-
- ECU-controlled shifting
- Compatibility with V6 engines
- Integrated cooling system
- Seamless AWD integration
- Efficiency
-
- Reduced internal friction
- Optimized fluid flow
- Lightweight design
- Improved fuel economy
Safety Features
- Fail Safe
-
- Limp-home mode
- Overheat protection
- Fluid pressure monitoring
- Driver Assistance
-
- Shift lock system
- Parking lock mechanism
- Reverse lockout
Comfort Features
- Noise Reduction
-
- Precision gear machining
- Vibration dampening mounts
- Sound-insulated casing
- Smoothness
-
- Adaptive shift logic
- Torque converter lockup
- Seamless gear transitions
- Convenience
-
- Paddle shifters (optional)
- Automatic park engagement
- One-touch sport mode
Accessories
- Upgrades
-
- Performance shift kit
- Enhanced cooling system
- Heavy-duty torque converter
- Tools
-
- Transmission fluid pump
- Seal installation tool
- ECU diagnostic scanner
- Maintenance
-
- Transmission fluid filter kit
- Gasket and seal kit
- Fluid exchange machine
Maintenance
- Service interval
- Every 60,000 miles or 60 months
- Service Items
-
- Transmission fluid replacement
- Filter replacement
- Seal inspection
- Shift linkage adjustment
- ECU software update
- Maintenance Notes
- Use only Toyota WS ATF 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 seals
- Extended
- Miles: 100,000Years: 7Coverage: Optional extended coverage
Production Details
- Manufacturer
- Aisin Seiki Co., Ltd.
- Manufacturing Process
-
- Precision CNC machining
- Heat treatment of gears
- Automated assembly
- Quality testing under load
- Quality Control
- inspection: 100% component testingTolerance: ±0.001 inchesDurability: Simulated 150,000-mile testing
- Sustainability
-
- Recycled aluminum usage
- Low-emission manufacturing
- Eco-friendly fluid options
- Production Metrics
- Units Per Year: 250,000Defect Rate: 0.01%Lead Time: 4 weeks
Service Information for u151 transmission Service
Maintenance and service requirements specific to this component
- Inspect transmission fluid level
- Check for leaks
- Test shift performance
- Inspect mounts and linkages
Ensure fluid is at operating temperature during inspection.
- Replace transmission fluid
- Replace fluid filter
- Inspect seals and gaskets
- Test ECU shift logic
Use only Toyota WS ATF for replacement.
- Full transmission flush
- Replace all seals and gaskets
- Inspect clutch packs
- Perform ECU diagnostic scan
Major service requires specialized tools and equipment.
Common Questions
Find answers to common questions about torque specifications
Q1 What are the technical specifications and compatibility details for the u151 transmission in 2004-2009 Lexus RX models?
What are the technical specifications and compatibility details for the u151 transmission in 2004-2009 Lexus RX models?
The u151 transmission, also known as the Aisin AWF21, is a 5-speed automatic transmission used in the 2004-2009 Lexus RX 330 and RX 350. It is compatible with 3.3L and 3.5L V6 engines. The transmission features a lock-up torque converter, electronic shift control, and a compact design for improved fuel efficiency. It is designed to handle up to 250 lb-ft of torque and is compatible with AWD and FWD configurations. Always verify compatibility with your specific vehicle model and year.
Q2 What are the maintenance requirements for the u151 transmission in a 2004-2009 Lexus RX?
What are the maintenance requirements for the u151 transmission in a 2004-2009 Lexus RX?
Regular maintenance for the u151 transmission includes checking and replacing the transmission fluid every 60,000 to 100,000 miles, depending on driving conditions. Use only Toyota Type WS ATF for optimal performance. Inspect the transmission pan and gasket for leaks during fluid changes. Additionally, ensure the transmission cooler lines are free of debris and functioning properly. Periodic inspections of the shift solenoids and sensors are recommended to prevent shifting issues.
Q3 How do I install or replace the u151 transmission in a 2004-2009 Lexus RX?
How do I install or replace the u151 transmission in a 2004-2009 Lexus RX?
To replace the u151 transmission, first, disconnect the battery and remove the transmission fluid. Support the engine with a hoist and remove the driveshaft, exhaust components, and crossmember. Disconnect the shift linkage, electrical connectors, and cooler lines. Lower the transmission using a jack and remove it from the vehicle. Install the new transmission by reversing the steps, ensuring all connections are secure. Refill with Toyota Type WS ATF and test for proper operation.
Q4 What are common troubleshooting steps for the u151 transmission in a 2004-2009 Lexus RX?
What are common troubleshooting steps for the u151 transmission in a 2004-2009 Lexus RX?
Common issues with the u151 transmission include harsh shifting, delayed engagement, and transmission slippage. Start by checking the transmission fluid level and condition. Low or contaminated fluid can cause these issues. Inspect the shift solenoids and sensors for proper operation. Use a diagnostic scanner to check for error codes. If no issues are found, consider a transmission fluid flush or replacement of worn components like the torque converter or valve body.
Q5 How can I optimize the performance of the u151 transmission in my 2004-2009 Lexus RX?
How can I optimize the performance of the u151 transmission in my 2004-2009 Lexus RX?
To optimize performance, ensure the transmission fluid is at the correct level and use only Toyota Type WS ATF. Regularly inspect and replace the transmission filter if applicable. Avoid aggressive driving and excessive towing to reduce wear. Consider installing an aftermarket transmission cooler for improved heat dissipation. Periodic software updates from a Lexus dealer can also enhance shifting performance and overall transmission efficiency.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2004-2009 Lexus RX Transmission Service Manual
Coming SoonDetailed service manual covering the u151 transmission, including maintenance procedures, troubleshooting, and repair instructions.
Technical Service Bulletin for u151 Transmission
Coming SoonTSB addressing common issues and updates for the u151 transmission in 2004-2009 Lexus RX models.
Lexus RX Transmission Parts Catalog
Coming SoonComprehensive catalog of OEM and aftermarket parts for the u151 transmission, including part numbers and compatibility details.
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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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