Lexus GX 2003-2009 A750 Transmission Specifications
This document provides detailed technical specifications for the A750 transmission used in the 2003-2009 Lexus GX 470. It includes information on gear ratios, torque capacity, fluid requirements, and maintenance intervals. These specifications are essential for owners, mechanics, and enthusiasts to understand the transmission's performance, ensure proper maintenance, and identify compatibility for repairs or upgrades. The data is sourced from official service manuals and technical guides, offering reliable and accurate insights for troubleshooting, servicing, or enhancing the vehicle's drivetrain system.
Overview Specifications
This document provides detailed specifications and technical information about the A750 transmission used in the 2003-2009 Lexus GX. It is designed to assist users in understanding the transmission's features, maintenance requirements, and performance characteristics. Use the search functionality to locate specific details or navigate through the sections for a comprehensive understanding of the A750 transmission.
How to Use
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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
Torque Capacity
650 Nm
Fluid Capacity
12.6 liters
Gear Ratios
3.520:1 to 0.716:1
Service Interval
60,000 miles
Available Specifications
Transmission Design
This section covers the design and construction of the A750 transmission, including its architecture, materials, and key components. It provides insights into the engineering behind the transmission's durability and performance.
Transmission Design
This section covers the design and construction of the A750 transmission, including its architecture, materials, and key components. It provides insights into the engineering behind the transmission's durability and performance.
Architecture
- 5-speed automatic transmission
- Longitudinal mounting configuration
- Aluminum alloy casing for reduced weight
- Integrated torque converter
- Electronically controlled shifting
- Sealed for life design
Key Components
- Planetary gear sets for smooth shifting
- High-strength steel clutch plates
- Advanced hydraulic control system
- Durable output shaft
- Integrated cooling system
- Sealed bearings for reduced maintenance
Performance Specifications
This section outlines the performance characteristics of the A750 transmission, including gear ratios, torque capacity, and shift response. It highlights the transmission's ability to deliver smooth and efficient power delivery.
Performance Specifications
This section outlines the performance characteristics of the A750 transmission, including gear ratios, torque capacity, and shift response. It highlights the transmission's ability to deliver smooth and efficient power delivery.
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 Capacity
- Maximum torque capacity: 650 Nm
- Designed for V8 engines
- Optimized for towing and off-road use
- Enhanced clutch pack for high torque handling
- Robust input shaft design
- Efficient power transfer with minimal loss
Maintenance and Service
This section provides guidance on maintaining and servicing the A750 transmission. It includes information on fluid specifications, service intervals, and common troubleshooting tips.
Maintenance and Service
This section provides guidance on maintaining and servicing the A750 transmission. It includes information on fluid specifications, service intervals, and common troubleshooting tips.
Fluid Specifications
- Recommended fluid: Toyota Type WS ATF
- Fluid capacity: 12.6 liters (dry fill)
- Fluid change interval: 60,000 miles or 96,000 km
- Fluid temperature range: -40°C to 150°C
- Sealed system with no dipstick
- Fluid level checked via overflow plug
Service Intervals
- Inspect transmission fluid every 30,000 miles
- Replace transmission filter every 60,000 miles
- Check for leaks during routine maintenance
- Monitor shift quality and responsiveness
- Perform software updates as needed
- Inspect mounts and linkages for wear
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Transmission Specifications
Overview
- Type
- Automatic
- Configuration
- 5-speed
- Platform
- Lexus GX 470
- Material
- Aluminum alloy
- Location
- Front-engine, rear-wheel drive
Dimensions
- Length
- 28.5 inches / 724 mm
- Width
- 22.7 inches / 577 mm
- Height
- 18.3 inches / 465 mm
- Weight
- 165 lbs / 75 kg
- input Shaft Diameter
- 1.2 inches / 30 mm
- Output Shaft Diameter
- 1.5 inches / 38 mm
- Oil Capacity
- 7.9 quarts / 7.5 liters
Materials
- Housing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Plates
- Composite friction material
- Seals
- Synthetic rubber
- Cooler Lines
- Steel with rubber coating
Features
- Transmission Technology
-
- Electronic shift control
- Adaptive shift logic
- Torque converter lockup
- Driving Modes
-
- Normal
- Power
- Snow
- Manual
- Cooling System
-
- Integrated oil cooler
- Thermostatic control
- External cooler lines
- Sensors
-
- Speed sensor
- Temperature sensor
- Position sensor
- Safety Features
-
- Overheat protection
- Fail-safe mode
- Shift lock
Safety Features
- Overheat Protection
- Automatically reduces engine power
- Fail-Safe Mode
- Limits gear shifts in case of failure
- Shift Lock
- Prevents shifting out of park without brake
Comfort Features
- Shift Quality
- Smooth and precise
- Noise Reduction
- Optimized gear meshing
- Adaptive Logic
- Adjusts to driving style
- Manual Mode
- Driver-controlled shifting
Accessories
- Cooling
-
- Transmission cooler
- Thermostatic valve
- Cooler lines
- Mounting
-
- Transmission mount
- Crossmember
- Brackets
- Electrical
-
- Shift solenoid
- Speed sensor
- Wiring harness
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Fluid and filter replacement
- Inspect for leaks
- Check shift quality
- Inspect mount condition
- Test sensors
- Maintenance Notes
- Use only recommended transmission fluid
Warranty
- Basic
- 3 years / 36,000 miles
- Powertrain
- 5 years / 60,000 miles
- Corrosion
- 5 years / unlimited miles
- Emissions
- 8 years / 80,000 miles
- Warranty Terms
- Coverage includes defects in materials or workmanship
Production Details
- Manufacturer
- Aisin Seiki Co., Ltd.
- Manufacturing Process
-
- Precision machining
- Automated assembly
- Quality testing
- Quality Control
- Testing: Durability and performanceinspection: 100% component verificationCertification: ISO 9001
- Sustainability Practices
-
- Recycling of materials
- Energy-efficient production
- Low-emission processes
- Production Metrics
- Annual Output: 500,000 unitsDefect Rate: < 0.1%Lead Time: 2 weeks
Service Information for a750 transmission Service
Maintenance and service requirements specific to this component
- Replace transmission fluid
- Replace filter
- Inspect for leaks
- Check shift quality
- Test sensors
Use only recommended transmission fluid
- Replace transmission fluid
- Replace filter
- Inspect mount condition
- Check cooler lines
- Test shift solenoids
Inspect for wear on clutch plates
- Replace transmission fluid
- Replace filter
- Inspect gear condition
- Check torque converter
- Test electronic control unit
Consider a complete transmission overhaul
Common Questions
Find answers to common questions about torque specifications
Q1 Is the A750 transmission compatible with other Lexus models?
Is the A750 transmission compatible with other Lexus models?
The A750 transmission, used in the 2003-2009 Lexus GX, is specifically designed for this model and may not be directly compatible with other Lexus vehicles without modifications. It is a 5-speed automatic transmission with a torque converter, optimized for SUVs. Always verify compatibility with your vehicle's VIN and consult a professional before attempting cross-model installations.
Q2 What are the maintenance requirements for the A750 transmission?
What are the maintenance requirements for the A750 transmission?
The A750 transmission requires regular maintenance to ensure longevity. This includes fluid changes every 60,000 miles, inspection of the transmission pan for leaks, and replacement of the filter. Additionally, check for software updates from Lexus to ensure optimal performance. Neglecting maintenance can lead to shifting issues or transmission failure.
Q3 How do I replace the A750 transmission in a Lexus GX?
How do I replace the A750 transmission in a Lexus GX?
Replacing the A750 transmission involves several steps: 1) Disconnect the battery and drain the transmission fluid. 2) Remove the driveshaft, exhaust components, and crossmember. 3) Detach the transmission cooler lines and electrical connectors. 4) Support the transmission with a jack and remove the mounting bolts. 5) Install the new transmission in reverse order, ensuring proper alignment and torque specifications.
Q4 What should I do if my A750 transmission is slipping or not shifting properly?
What should I do if my A750 transmission is slipping or not shifting properly?
If your A750 transmission is slipping or not shifting, start by checking the transmission fluid level and condition. Low or dirty fluid can cause these issues. Inspect for leaks, damaged wiring, or faulty sensors. If the problem persists, perform a diagnostic scan to identify error codes. Common solutions include fluid replacement, sensor repair, or software updates.
Q5 How can I optimize the performance of my A750 transmission?
How can I optimize the performance of my A750 transmission?
To optimize the A750 transmission's performance, use high-quality transmission fluid recommended by Lexus. Regularly update the transmission control module software. Avoid aggressive driving and ensure proper cooling system function to prevent overheating. Installing an auxiliary transmission cooler can also enhance performance, especially under heavy load or towing conditions.
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 GX 470 Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and troubleshooting for the 2003-2009 Lexus GX 470, including the A750 transmission.
A750 Transmission Technical Bulletin
Coming SoonTechnical service bulletin addressing common issues, updates, and fixes for the A750 transmission in Lexus GX models.
Lexus GX Transmission Parts Catalog
Coming SoonDetailed catalog of OEM and aftermarket parts for the A750 transmission, including gaskets, filters, and sensors.
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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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