Lexus HS 2010-2012 K120 Transmission Specifications
This document provides detailed technical specifications for the K120 transmission used in the 2010-2012 Lexus HS. It includes information on gear ratios, torque capacity, fluid type, and maintenance intervals. These specifications are essential for mechanics, enthusiasts, and owners looking to understand the transmission's performance, ensure proper maintenance, or diagnose issues. The data is sourced from official Lexus service manuals and technical guides, ensuring accuracy and reliability. Whether you're performing routine maintenance, planning upgrades, or troubleshooting, this resource offers valuable insights into the K120 transmission's design and functionality.
Overview Specifications
This document provides detailed specifications and technical information about the k120-transmission used in the 2010-2012 Lexus HS. It is designed to assist technicians, engineers, and enthusiasts in understanding the transmission's design, functionality, and maintenance requirements. Use the search and navigation instructions to quickly locate specific details or browse through the sections for a comprehensive understanding of the k120-transmission.
How to Use
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Key Specifications
Transmission Type
7-speed CVT
Fluid Capacity
7.5 quarts
Gear Ratios
3.300:1 to 0.713:1
Service Interval
60,000 miles
Weight
120 lbs
Available Specifications
Transmission Design
This section covers the structural and mechanical design of the k120-transmission, including its components, layout, and integration with the Lexus HS powertrain. Learn about the transmission's construction and how it contributes to vehicle performance.
Transmission Design
This section covers the structural and mechanical design of the k120-transmission, including its components, layout, and integration with the Lexus HS powertrain. Learn about the transmission's construction and how it contributes to vehicle performance.
Gear Configuration
- 7-speed Continuously Variable Transmission (CVT)
- Front-wheel drive configuration
- Compact and lightweight design for improved fuel efficiency
- Integrated torque converter for smooth power delivery
- Electronically controlled shift logic
- Optimized for hybrid powertrain compatibility
Materials and Durability
- High-strength aluminum alloy casing
- Precision-machined gears for reduced friction
- Reinforced bearings for extended lifespan
- Corrosion-resistant coatings on internal components
- Designed for low maintenance requirements
Performance Specifications
Explore the performance characteristics of the k120-transmission, including gear ratios, shift patterns, and efficiency metrics. This section provides insights into how the transmission enhances the driving experience in the Lexus HS.
Performance Specifications
Explore the performance characteristics of the k120-transmission, including gear ratios, shift patterns, and efficiency metrics. This section provides insights into how the transmission enhances the driving experience in the Lexus HS.
Gear Ratios
- 1st gear ratio: 3.300:1
- 2nd gear ratio: 1.900:1
- 3rd gear ratio: 1.420:1
- 4th gear ratio: 1.000:1
- 5th gear ratio: 0.713:1
- Reverse gear ratio: 4.148:1
Shift Performance
- Seamless gear transitions for smooth acceleration
- Adaptive shift logic for varying driving conditions
- Quick response to throttle inputs
- Low noise and vibration levels
- Optimized for hybrid powertrain efficiency
Maintenance and Service
This section provides guidelines for maintaining and servicing the k120-transmission. Learn about recommended service intervals, fluid specifications, and common troubleshooting tips to ensure optimal performance and longevity.
Maintenance and Service
This section provides guidelines for maintaining and servicing the k120-transmission. Learn about recommended service intervals, fluid specifications, and common troubleshooting tips to ensure optimal performance and longevity.
Fluid Requirements
- Recommended fluid: Toyota Genuine CVT Fluid
- Fluid capacity: 7.5 quarts (7.1 liters)
- Fluid change interval: Every 60,000 miles
- Use of incorrect fluid may void warranty
- Fluid level check procedure included in owner's manual
Common Issues and Solutions
- Delayed shifting: Check fluid level and condition
- Unusual noises: Inspect for worn bearings or gears
- Transmission overheating: Verify cooling system functionality
- Error codes: Use diagnostic tools to identify issues
- Regular inspections recommended for hybrid systems
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Transmission Specifications
Overview
- Type
- Continuously Variable Transmission (CVT)
- Configuration
- Front-wheel drive
- Platform
- Lexus HS 250h
- Material
- Aluminum alloy casing
- Location
- Front engine, transverse-mounted
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
- 1.1 inches (28 mm)
- Fluid Capacity
- 7.4 quarts (7 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- High-strength steel
- Belts
- High-tensile composite
- Bearings
- Chrome steel
- Seals
- Nitrile rubber
Features
- Performance
-
- Smooth acceleration
- Efficient power delivery
- Adaptive shift logic
- Efficiency
-
- Optimized for hybrid powertrain
- Reduced mechanical losses
- Eco-mode for fuel savings
- Durability
-
- Reinforced belt design
- High-temperature resistance
- Corrosion-resistant materials
- Technology
-
- Electronic control unit (ECU)
- Drive mode selection
- Regenerative braking integration
- Comfort
-
- Quiet operation
- Seamless gear shifts
- Low vibration
Safety Features
- Fail-Safes
-
- Overheat protection
- Emergency limp mode
- Monitoring
-
- Real-time diagnostics
- Fluid level sensors
- Structural
-
- Reinforced casing
- Impact-resistant mounts
Comfort Features
- Noise Reduction
-
- Sound-dampening materials
- Precision-engineered components
- Vibration Control
-
- Balanced rotating assembly
- Isolated mounts
- Drivability
-
- Smooth acceleration
- Adaptive shift patterns
- Climate Adaptation
-
- Cold-start optimization
- High-temperature resilience
Accessories
- Fluids
-
- CVT-specific transmission fluid
- Seal conditioner
- Additives for longevity
- Tools
-
- Transmission jack adapter
- Fluid pump
- Diagnostic scanner
- Upgrades
-
- Performance ECU tuning
- Enhanced cooling kit
- Heavy-duty mounts
Maintenance
- Service interval
- Every 60,000 miles or 60 months
- Service Items
-
- Fluid replacement
- Filter inspection
- Belt tension check
- Seal inspection
- Diagnostic scan
- Maintenance Notes
- Use only Lexus-approved CVT fluid for optimal performance.
Warranty
- Basic
- Miles: 50,000Years: 4Coverage: Parts and labor
- Powertrain
- Miles: 70,000Years: 6Coverage: Transmission components
- Corrosion
- Miles: UnlimitedYears: 6Coverage: Perforation only
- Emissions
- Miles: 80,000Years: 8Coverage: Emission-related components
- Warranty Terms
- Transferable to subsequent owners
Production Details
- Manufacturer
- Aisin Seiki Co., Ltd.
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser alignment
- Quality Control
- inspection: 100% component testingTolerances: Within 0.001 inchesDurability Testing: Simulated 150,000-mile lifespan
- Sustainability Practices
-
- Recycled aluminum usage
- Low-emission manufacturing
- Waste reduction initiatives
- Production Metrics
- Units Per Day: 500Defect Rate: 0.01%Energy Efficiency: 15% improvement over previous model
Service Information for k120 transmission Service
Maintenance and service requirements specific to this component
- Inspect transmission fluid level
- Check for leaks
- Scan for diagnostic codes
- Inspect mounts and linkages
Ensure fluid is at operating temperature during inspection.
- Replace transmission fluid
- Inspect and clean fluid pan
- Check belt tension
- Inspect seals and gaskets
Use only Lexus-approved CVT fluid for replacement.
- Perform full diagnostic scan
- Inspect and replace worn belts
- Check and adjust shift linkage
- Test transmission performance
Major service interval; consider professional inspection.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the K120 transmission compatible with all 2010-2012 Lexus HS models?
Is the K120 transmission compatible with all 2010-2012 Lexus HS models?
The K120 transmission is specifically designed for the 2010-2012 Lexus HS 250h models. It is not compatible with other Lexus models or trims due to differences in engine configurations and mounting points. Always verify your vehicle's VIN and model year before purchasing to ensure compatibility.
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, including fluid changes every 60,000 miles or as specified in the owner's manual. Inspect for leaks, unusual noises, or shifting issues during routine service. Use only Lexus-approved transmission fluid to ensure optimal performance and longevity.
Q3 How do I replace the K120 transmission in a 2010-2012 Lexus HS?
How do I replace the K120 transmission in a 2010-2012 Lexus HS?
Replacing the K120 transmission involves lifting the vehicle, removing the undercarriage shields, disconnecting the driveshaft, and unbolting the transmission. Ensure the replacement unit matches the original specifications. Follow the service manual for torque specifications and reinstallation steps. Professional installation is recommended.
Q4 What should I do if my K120 transmission is slipping or not shifting properly?
What should I do if my K120 transmission is slipping or not shifting properly?
If the K120 transmission is slipping or not shifting, check the transmission fluid level and condition first. Low or contaminated fluid can cause issues. Inspect for error codes using a diagnostic tool. If problems persist, consult a certified technician for further diagnosis and repair.
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, ensure regular fluid changes, use high-quality Lexus-approved fluid, and avoid aggressive driving habits. Keep the transmission cool by ensuring the cooling system is functioning properly. Regularly inspect for leaks and address any issues promptly.
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 HS 250h Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and troubleshooting for the 2010-2012 Lexus HS 250h, including the K120 transmission.
K120 Transmission Technical Bulletin
Coming SoonTechnical service bulletin addressing common issues, updates, and fixes for the K120 transmission in 2010-2012 Lexus HS models.
Lexus HS 250h Parts Catalog
Coming SoonDetailed catalog of OEM parts and accessories for the 2010-2012 Lexus HS 250h, including transmission components.
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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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