Lexus UX 2019-present K120 Transmission Specifications
This document provides a detailed overview of the K120 transmission specifications for the 2019-Present Lexus UX. It includes technical details such as gear ratios, torque capacity, fluid requirements, and maintenance intervals. The specifications are essential for understanding the transmission's performance, ensuring proper maintenance, and diagnosing issues. This resource is valuable for technicians, enthusiasts, and owners seeking to optimize their vehicle's performance or perform repairs. The information is derived from official service manuals and technical guides, ensuring accuracy and reliability.
Overview Specifications
This document provides detailed specifications and technical information about the K120 transmission used in the 2019-Present Lexus UX. It is designed to assist engineers, technicians, and enthusiasts in understanding the transmission's features, performance, and maintenance requirements. The document is organized into sections for easy navigation and includes a quick reference guide for key specifications.
How to Use
Use the search function to quickly locate specific terms or phrases within the document. Enter the keyword in the search bar and review the highlighted results for relevant information.
Navigate through the document by scrolling or using the table of contents. Each section is clearly labeled, and subsections provide detailed information on specific aspects of the K120 transmission.
Key Specifications
Transmission Type
CVT
Gear Ratio Range
6.7:1
Weight
85 kg
Maximum Torque
205 Nm
Fluid Capacity
7.5 liters
Available Specifications
Transmission Design
This section covers the design and architecture of the K120 transmission, including its components, construction, and operational principles. It provides insights into how the transmission is engineered for efficiency and reliability.
Transmission Design
This section covers the design and architecture of the K120 transmission, including its components, construction, and operational principles. It provides insights into how the transmission is engineered for efficiency and reliability.
Transmission Type
- Continuously Variable Transmission (CVT)
- Front-wheel drive configuration
- Electronically controlled shifting
- Compact and lightweight design
- Optimized for fuel efficiency
- Smooth and responsive performance
Key Components
- Primary and secondary pulleys
- Steel push belt
- Hydraulic control system
- Torque converter with lock-up clutch
- Integrated cooling system
- Electronic control unit (ECU)
Performance Characteristics
This section highlights the performance attributes of the K120 transmission, including its efficiency, power handling, and driving dynamics. It also discusses the transmission's ability to adapt to various driving conditions.
Performance Characteristics
This section highlights the performance attributes of the K120 transmission, including its efficiency, power handling, and driving dynamics. It also discusses the transmission's ability to adapt to various driving conditions.
Efficiency and Fuel Economy
- Low internal friction for improved efficiency
- Wide gear ratio range for optimal performance
- Reduced energy loss through advanced design
- Enhanced fuel economy in urban and highway driving
- Eco mode for further efficiency improvements
- Regenerative braking integration
Driving Dynamics
- Seamless acceleration with no shift shocks
- Adaptive shifting for different driving styles
- Sport mode for enhanced responsiveness
- Improved traction in various road conditions
- Quiet and smooth operation
- Enhanced driver control through paddle shifters
Maintenance and Durability
This section provides information on the maintenance requirements and durability features of the K120 transmission. It includes guidelines for servicing and tips for ensuring long-term reliability.
Maintenance and Durability
This section provides information on the maintenance requirements and durability features of the K120 transmission. It includes guidelines for servicing and tips for ensuring long-term reliability.
Maintenance Schedule
- Regular transmission fluid checks
- Fluid replacement intervals at 60,000 miles
- Inspection of belts and pulleys
- Software updates for the ECU
- Periodic cooling system maintenance
- Lubrication of moving parts
Durability Features
- High-strength materials for critical components
- Robust design for long service life
- Advanced cooling system to prevent overheating
- Sealed construction to protect against contaminants
- Vibration damping for reduced wear
- Tested under extreme conditions for reliability
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Transmission Specifications
Overview
- Type
- Continuously Variable Transmission (CVT)
- Configuration
- Front-wheel drive (FWD) and All-wheel drive (AWD) compatible
- Platform
- Lexus New Global Architecture (GA-C)
- Material
- Aluminum alloy casing
- Location
- Front-mounted, transverse
Dimensions
- Length
- 22.5 inches (571.5 mm)
- Width
- 18.3 inches (464.8 mm)
- Height
- 14.7 inches (373.4 mm)
- Weight
- 145 lbs (65.8 kg)
- input Shaft Diameter
- 1.2 inches (30.5 mm)
- Output Shaft Diameter
- 1.1 inches (27.9 mm)
- Fluid Capacity
- 5.3 quarts (5.0 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- High-strength steel
- Belts
- Carbon-reinforced composite
- Bearings
- Chromium steel
- Seals
- Synthetic rubber
Features
- Performance
-
- Direct Shift-CVT technology
- Simulated 10-speed sequential shift mode
- Eco and Sport driving modes
- Smooth and responsive acceleration
- Efficiency
-
- Optimized gear ratios for fuel economy
- Reduced internal friction
- Lightweight design
- Eco mode for improved efficiency
- Durability
-
- Reinforced belt design
- High-temperature resistance
- Corrosion-resistant materials
- Extended service intervals
- Technology
-
- Electronic control unit (ECU) integration
- Adaptive shift logic
- Hill-start assist
- Downshift rev-matching
- Comfort
-
- Quiet operation
- Smooth gear transitions
- Reduced vibration
- Enhanced driving stability
Safety Features
- Mechanical Safety
-
- Overheat protection
- Torque limitation during wheel slip
- Electronic Safety
-
- Transmission control module (TCM) diagnostics
- Fail-safe mode in case of system failure
- Driver Assistance
-
- Hill-start assist
- Downhill assist control
Comfort Features
- Noise Reduction
-
- Acoustic damping materials
- Precision-engineered gears
- Vibration Control
-
- Balanced rotating components
- Isolated mounting points
- Driving Modes
-
- Eco mode for relaxed driving
- Sport mode for dynamic performance
- Climate Adaptation
-
- Cold-start optimization
- High-temperature protection
Accessories
- Transmission Fluids
-
- Lexus Genuine CVT Fluid
- Synthetic CVT fluid alternatives
- Mounting Components
-
- Transmission mounts
- Bracket kits
- Diagnostic Tools
-
- OBD-II scanner
- Transmission-specific diagnostic software
Maintenance
- Service interval
- Every 60,000 miles or 60 months
- Service Items
-
- Transmission fluid replacement
- Filter inspection and replacement
- Seal and gasket inspection
- Belt and pulley inspection
- Electronic control unit (ECU) diagnostics
- Maintenance Notes
- Use only Lexus Genuine CVT Fluid for optimal performance and longevity.
Warranty
- Basic Warranty
- Miles: 50,000Years: 4Coverage: Bumper-to-bumper
- Powertrain Warranty
- Miles: 70,000Years: 6Coverage: Transmission and drivetrain components
- Corrosion Warranty
- Miles: UnlimitedYears: 6Coverage: Perforation from corrosion
- Hybrid Warranty
- Miles: 100,000Years: 8Coverage: Hybrid system components
Production Details
- Manufacturer
- Aisin Seiki Co., Ltd.
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly lines
- Laser alignment for components
- Quality Control
- inspection Stages: Pre-assembly component testing, Post-assembly performance testing, Durability and stress testingCertifications: ISO 9001, ISO/TS 16949
- Sustainability Practices
-
- Recycled materials in casing
- Energy-efficient manufacturing
- Waste reduction initiatives
- Production Metrics
- Annual Production: Approximately 500,000 unitsDefect Rate: Less than 0.01%
Service Information for k120 transmission Service
Maintenance and service requirements specific to this component
- Inspect transmission fluid level and condition
- Check for leaks and seal integrity
- Perform electronic control unit (ECU) diagnostics
- Inspect mounting points and brackets
Early inspection ensures optimal performance and longevity.
- Replace transmission fluid
- Replace transmission filter
- Inspect belts and pulleys
- Check and recalibrate shift logic
Use only Lexus Genuine CVT Fluid for replacement.
- Perform full transmission inspection
- Replace worn seals and gaskets
- Test and recalibrate electronic control unit (ECU)
- Inspect and replace transmission mounts if necessary
Major service interval requires specialized tools and expertise.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the K120 transmission compatible with all 2019-Present Lexus UX models?
Is the K120 transmission compatible with all 2019-Present Lexus UX models?
The K120 transmission is specifically designed for the 2019-Present Lexus UX models, including both hybrid and non-hybrid variants. It is engineered to work seamlessly with the 2.0L inline-4 engine and the hybrid powertrain. However, compatibility may vary based on specific trim levels or regional configurations. Always verify your vehicle's VIN and consult the manufacturer's documentation to ensure proper fitment.
Q2 What are the maintenance requirements for the K120 transmission?
What are the maintenance requirements for the K120 transmission?
The K120 transmission requires regular maintenance to ensure optimal performance. Lexus recommends inspecting the transmission fluid every 30,000 miles and replacing it every 60,000 miles. Additionally, check for leaks, unusual noises, or shifting issues during routine service. For hybrid models, ensure the electric motor components are inspected as part of the transmission system. Adhering to the maintenance schedule outlined in the owner's manual is crucial for longevity.
Q3 How do I install or replace the K120 transmission in my Lexus UX?
How do I install or replace the K120 transmission in my Lexus UX?
Replacing the K120 transmission involves several steps: 1) Disconnect the battery and remove the undercarriage panels. 2) Drain the transmission fluid and disconnect the driveshaft and wiring harness. 3) Support the engine and remove the transmission mounting bolts. 4) Carefully lower the transmission and install the new unit, ensuring proper alignment. 5) Reconnect all components and refill with the recommended transmission fluid. Due to the complexity, professional installation is recommended.
Q4 What should I do if my K120 transmission is not shifting smoothly?
What should I do if my K120 transmission is not shifting smoothly?
If your K120 transmission is not shifting smoothly, start by checking the transmission fluid level and condition. Low or contaminated fluid can cause shifting issues. Inspect for error codes using an OBD-II scanner, as electronic issues may also affect performance. If the problem persists, consult a certified technician to diagnose potential internal damage, such as worn clutches or solenoid issues. Regular maintenance can prevent many common problems.
Q5 How can I optimize the performance of my K120 transmission?
How can I optimize the performance of my K120 transmission?
To optimize the K120 transmission's performance, use only Lexus-approved transmission fluid and ensure it is at the correct level. Avoid aggressive driving and excessive towing, as these can strain the transmission. Regularly update the vehicle's software to benefit from performance enhancements. For hybrid models, ensure the electric motor and battery systems are functioning optimally, as they directly impact 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.
Lexus UX 2019-Present Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and technical specifications for the Lexus UX, including the K120 transmission.
K120 Transmission Technical Bulletin
Coming SoonLatest updates and technical service bulletins for the K120 transmission, including common issues and solutions.
Lexus UX Parts and Accessories Catalog
Coming SoonDetailed catalog of genuine parts and accessories for the Lexus UX, including transmission components.
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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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