Lexus NX 2022-present K120 Transmission Specifications
This document provides a detailed overview of the K120 transmission specifications for the 2022-Present Lexus NX. It includes critical 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 potential issues. Whether you're a technician, enthusiast, or owner, this information is invaluable for optimizing the vehicle's performance and longevity. The document also highlights compatibility with different Lexus NX trims and engine configurations, making it a comprehensive resource for anyone working with or owning this model.
Overview Specifications
This document provides detailed specifications and technical information about the k120-transmission used in the 2022-Present Lexus NX. It is designed to assist users in understanding the transmission's features, performance, and maintenance requirements. Use the search and navigation instructions to quickly find relevant information. The document is divided into major sections, each focusing on a specific aspect of the transmission.
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Key Specifications
Transmission Type
8-speed automatic
Gear Ratios
4.696 to 0.582
Weight
187 lbs (85 kg)
Maximum Torque
280 lb-ft (380 Nm)
Fluid Capacity
7.4 quarts (7 liters)
Available Specifications
Transmission Design
This section covers the design and engineering of the k120-transmission, including its architecture, materials, and integration with the Lexus NX powertrain.
Transmission Design
This section covers the design and engineering of the k120-transmission, including its architecture, materials, and integration with the Lexus NX powertrain.
Architecture
- 8-speed automatic transmission
- Compact and lightweight design
- Optimized for front-wheel and all-wheel drive configurations
- Seamless integration with hybrid powertrains
- Enhanced durability with high-strength materials
- Low friction design for improved efficiency
Materials
- High-strength aluminum alloy casing
- Precision-machined gears
- Advanced synthetic transmission fluid
- Corrosion-resistant components
- Heat-treated steel for critical parts
Performance Features
This section highlights the performance characteristics of the k120-transmission, including shift quality, efficiency, and responsiveness.
Performance Features
This section highlights the performance characteristics of the k120-transmission, including shift quality, efficiency, and responsiveness.
Shift Quality
- Smooth and precise gear shifts
- Adaptive shift control for varying driving conditions
- Reduced shift shock and noise
- Quick downshifts for improved acceleration
- Customizable shift patterns in Sport mode
Efficiency
- Optimized gear ratios for fuel economy
- Reduced internal friction
- Eco mode for enhanced efficiency
- Low drag torque converter
- Improved thermal management
Maintenance and Durability
This section provides information on maintaining the k120-transmission, including service intervals, common issues, and durability features.
Maintenance and Durability
This section provides information on maintaining the k120-transmission, including service intervals, common issues, and durability features.
Service Intervals
- Transmission fluid change every 60,000 miles
- Regular inspection of seals and gaskets
- Software updates for shift calibration
- Lifetime fluid for hybrid models
- Filter replacement as needed
Durability
- Designed for 200,000+ miles of reliable operation
- Robust cooling system for high-temperature conditions
- Sealed components to prevent contamination
- Extensive testing under extreme conditions
- Warranty coverage for 10 years or 100,000 miles
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Transmission Specifications
Overview
- Type
- 8-speed Direct Shift Automatic Transmission
- Configuration
- Front-wheel drive (FWD) and All-wheel drive (AWD) compatible
- Platform
- Toyota New Global Architecture (TNGA-K)
- Material
- Aluminum alloy casing
- Location
- Mounted longitudinally in the engine bay
Dimensions
- Length
- 22.8 inches (579 mm)
- Width
- 15.7 inches (400 mm)
- Height
- 13.4 inches (340 mm)
- Weight
- 187 lbs (85 kg)
- input Shaft Diameter
- 1.2 inches (30 mm)
- Output Shaft Diameter
- 1.4 inches (35 mm)
- Fluid Capacity
- 7.4 quarts (7 liters)
Materials
- Casing
- Aluminum alloy with magnesium reinforcement
- Gears
- High-strength forged steel
- Clutch Packs
- Carbon fiber composite
- Seals
- Fluorocarbon rubber
- Bearings
- Ceramic-coated steel
Features
- Performance
-
- Direct Shift technology for smoother gear changes
- Wide gear ratio spread for improved efficiency
- Quick-shift capability for sporty driving
- Adaptive shift control for varying driving conditions
- Efficiency
-
- Low-viscosity transmission fluid
- Optimized gear ratios for fuel economy
- Eco-mode for reduced energy consumption
- Idle-stop compatibility
- Drivability
-
- Seamless acceleration with minimal lag
- Manual shift mode with paddle shifters
- Hill-start assist
- Downshift rev-matching
- Durability
-
- Reinforced internal components
- High-temperature resistance
- Corrosion-resistant coatings
- Sealed for water and dust protection
- integration
-
- Compatible with hybrid powertrains
- Integrated torque converter
- Electronic control unit (ECU) integration
- CAN bus communication for diagnostics
Safety Features
- Mechanical Safety
-
- Overheat protection system
- Torque limiter for drivetrain protection
- Fail-safe mode for limp-home operation
- Electronic Safety
-
- Shift-lock system
- Parking pawl engagement sensor
- Reverse gear lockout
- Driver Assistance
-
- Adaptive cruise control compatibility
- Lane-keeping assist integration
- Collision avoidance system support
Comfort Features
- Noise Reduction
-
- Precision-machined gears for quiet operation
- Vibration-dampening mounts
- Acoustic insulation
- Smoothness
-
- Torque converter lock-up clutch
- Adaptive shift scheduling
- Low-speed creep control
- Convenience
-
- Auto park engagement
- One-touch sport mode
- Customizable drive modes
- Climate Adaptation
-
- Cold-start optimization
- High-temperature fluid cooling
- Humidity-resistant seals
Accessories
- Performance Upgrades
-
- Sport-tuned shift programming
- High-capacity transmission cooler
- Reinforced clutch packs
- Maintenance Tools
-
- Transmission fluid dipstick
- Diagnostic scan tool adapter
- Fluid exchange pump
- Protection
-
- Transmission skid plate
- Fluid temperature gauge
- Seal protection kit
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 manufacturer-recommended transmission fluid. Avoid overheating during heavy towing.
Warranty
- Basic Warranty
- Miles: 60,000Years: 5Coverage: Parts and labor for defects
- Powertrain Warranty
- Miles: 100,000Years: 10Coverage: Transmission components
- Corrosion Warranty
- Miles: UnlimitedYears: 6Coverage: Rust-through protection
- Extended Warranty
- Miles: 150,000Years: 12Coverage: Optional extended coverage
Production Details
- Manufacturer
- Aisin Seiki Co., Ltd.
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser alignment
- Dynamic balancing
- Quality Control
- Testing: Durability testing under extreme conditions, Noise and vibration analysis, Shift quality evaluationCertifications: ISO 9001, ISO 14001, TS 16949
- Sustainability Practices
-
- Recycled aluminum usage
- Low-emission manufacturing
- Waste reduction initiatives
- Production Metrics
- Annual Output: 500,000 unitsDefect Rate: Less than 0.1%Lead Time: 4 weeks
Service Information for k120 transmission Service
Maintenance and service requirements specific to this component
- Inspect transmission fluid level
- Check for leaks
- Test shift quality
- Update ECU software
Ensure fluid is at operating temperature during inspection.
- Replace transmission fluid
- Replace transmission filter
- Inspect seals and gaskets
- Check shift linkage
- Perform diagnostic scan
Use only manufacturer-approved fluid and filters.
- Complete transmission fluid flush
- Inspect and replace clutch packs if necessary
- Check torque converter operation
- Perform full system diagnostics
- Replace all seals and gaskets
Major service requires specialized tools and equipment.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the k120 transmission compatible with all 2022-Present Lexus NX models?
Is the k120 transmission compatible with all 2022-Present Lexus NX models?
The k120 transmission is specifically designed for the 2022-Present Lexus NX models, including both hybrid and non-hybrid variants. It is engineered to work seamlessly with the 2.4L turbocharged and 2.5L hybrid powertrains. However, compatibility may vary based on specific trim levels or regional configurations. Always verify your vehicle's specifications with your dealer or the official Lexus technical documentation.
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 a transmission fluid check every 30,000 miles and a full fluid replacement every 60,000 miles. Additionally, inspect for leaks, unusual noises, or shifting issues during routine service. Adhering to the maintenance schedule outlined in the owner's manual is crucial for longevity and reliability.
Q3 How do I install or replace the k120 transmission in my Lexus NX?
How do I install or replace the k120 transmission in my Lexus NX?
Replacing the k120 transmission is a complex process that should be performed by a certified technician. Key steps include disconnecting the battery, removing the driveshaft, unbolting the transmission mounts, and carefully detaching the transmission from the engine. Installation requires precise alignment and torque specifications. Refer to the official Lexus service manual for detailed instructions and safety precautions.
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 experiencing rough shifts, start by checking the transmission fluid level and condition. Low or contaminated fluid can cause shifting issues. If the fluid is fine, inspect the transmission control module for error codes using a diagnostic tool. Common solutions include resetting the transmission adaptive learning system or replacing worn components like solenoids or sensors.
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, ensure regular maintenance, including fluid changes and inspections. Use only Lexus-approved transmission fluid. Avoid aggressive driving and excessive towing to reduce wear. Additionally, consider updating the transmission control software to the latest version available from Lexus for improved shifting logic and 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 NX 2022-Present Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and technical specifications for the Lexus NX, including the k120 transmission.
Technical Service Bulletin: k120 Transmission Update
Coming SoonDetails software updates and technical improvements for the k120 transmission in 2022-Present Lexus NX models.
Lexus NX Parts and Accessories Catalog
Coming SoonOfficial catalog listing genuine parts and accessories for the 2022-Present Lexus NX, 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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