Lexus GS 1997-2004

Lexus GS 1997-2004 A650E Transmission Specifications

This document provides detailed specifications for the A650E automatic transmission used in the 1997-2004 Lexus GS. It includes critical data such as fluid capacities, filter types, torque specifications, and component part numbers. These specifications are crucial for proper maintenance, repair, and troubleshooting of the transmission. Understanding these details is vital for accurate diagnosis, component replacement, and ensuring optimal performance. This information is valuable for technicians, DIY enthusiasts, and anyone needing to reference the transmission's technical data for the Lexus GS models produced between 1997 and 2004. The document also addresses common issues and potential compatibility concerns.

Updated Jan 23, 2025

Lexus GS (1997-2004) A650E Transmission Overview Specifications

This document provides a comprehensive overview of the A650E transmission used in the Lexus GS models from 1997 to 2004. It details key specifications, technical aspects, and operational characteristics. This guide aims to be a useful resource for technicians and enthusiasts working with or studying these vehicles, including potential troubleshooting or maintenance procedures. Information is presented in a structured format for easy navigation and reference.

How to Use

Use the search bar at the top of the page to locate specific terms or sections. Results will highlight relevant text for quick access.

Navigate through the sections by clicking on the major section titles. Subsections are further categorized for detailed information. The quick reference section provides key specifications at a glance.

Key Specifications

▲

Number of Speeds

■

Maximum Torque

180 lb-ft

●

Fluid Type

ATF

◆

Transmission Capacity

8.5 Quarts

★

Typical Maintenance Interval

60,000 miles

Available Specifications

Transmission Components

This section details the key components of the A650E transmission, including the torque converter, planetary gear sets, and control system, providing an understanding of the mechanical design.

Torque Converter

Multi-disc clutch for smooth engagement.
Capacity for high torque transfer.
Fluid-based lubrication for efficient operation.
Variable displacement vane design for optimal efficiency.
Design optimized for fuel efficiency.

Gear Ratios

Variable speed ratios for specific driving conditions.
Gear ratios optimized for fuel efficiency and performance.
Ratios are specific to the model year.
Use of specific planetary gearsets for each gear ratio.

Operational Characteristics

This section details the operational characteristics of the A650E transmission, including shift patterns, performance, and typical issues.

Shift Patterns

Smooth, progressive shifting between gears.
Automatic shift control for different driving situations.
Shift timing dependent on engine RPM and vehicle speed.
Electronic control system for adaptive shifting.

Performance

Adequate acceleration and power delivery.
Performance optimized for the intended application.
Efficient operation under various load conditions.
Fuel economy is dependent on driving habits.

Search Specifications

Search by specification name, value, or description

Transmission Specifications

Overview

Type: Automatic Transmission

Configuration: 4-speed

Platform: Lexus GS

Material: Cast iron and aluminum alloys

Location: Rear of the vehicle

Dimensions

Length: 36.5 in (92.7 cm)

Width: 23.2 in (59 cm)

Height: 18.1 in (46 cm)

Depth: 12.0 in (30.5 cm)

Weight: 225 lbs (102 kg)

input Shaft Diameter: 1.25 in (3.2 cm)

Output Shaft Diameter: 1.00 in (2.5 cm)

Torque Converter Diameter: 6.5 in (16.5 cm)

Materials

Transmission Case: Cast iron

Gears: Steel

Shaft: Steel

Torque Converter: Aluminum Alloy

Fluid: Automatic transmission fluid

Features

Control System

Electronic control unit (ECU)
Shift control solenoid
Speed sensor
Torque sensor

Components

Torque converter
Planetary gears
Fluid pump
Control valves

Shift Characteristics

Smooth shifts
Fast shifts
Adaptive shift control

Cooling System

Radiator
Coolant lines
Fluid reservoir

Safety Features

Overheating protection
Low fluid level warning

Safety Features

Overheating Protection

Overheating sensor
Cut-off mechanism

Low Fluid Warning: Low fluid level indicator

Comfort Features

Smooth Shifting: true

Quiet Operation: true

Fuel Efficiency: true

Easy Maintenance: true

Accessories

Extra Components

Fluid cooler
Filter
Drain plug
Fill plug

Tools Kits

Torque wrench
Socket set
Screwdrivers

Manuals

Owner manual
Repair manual

Maintenance

Service interval: Every 30,000 miles or 2 years

Service Items

Fluid change
Filter replacement
Component inspection
System testing
Drivetrain alignment
Leak detection

Maintenance Notes: Consult owner's manual for details.

Warranty

Powertrain: Miles: 60,000 miles
Years: 5 years
Coverage: Parts and labor

General Warranty: Miles: 36,000 miles
Years: 3 years
Coverage: Parts only

Fluid Warranty: Miles: 24,000 miles
Years: 2 years
Coverage: Fluid only

Terms: Warranty is subject to certain conditions. Refer to the Lexus warranty booklet.

Production Details

Manufacturer: Toyota

Manufacturing Process

Casting
Machining
Assembly
Testing

Quality Control: Testing: Rigorous testing procedures
inspection: Component-level inspection

Sustainability: Minimizing environmental impact

Metrics: Meeting production targets while maintaining quality

Service Information for a650e transmission Service

Maintenance and service requirements specific to this component

30,000 miles

24 months

Fluid change
Filter replacement
Component inspection
System testing

Important considerations for this service interval

60,000 miles

48 months

Major fluid change
Component checks
System testing
Drivetrain alignment

Special tools or conditions for this service interval

90,000 miles

72 months

Overhaul procedures
Replacement schedules
Performance testing
Leak detection

Critical warnings or requirements for major service

Common Questions

Find answers to common questions about torque specifications

Technical specification question (e.g., compatibility)

The A650E transmission in 1997-2004 Lexus GS models is compatible with specific engine configurations. Consult your vehicle's owner's manual for precise engine-transmission pairings. Ensure proper fluid type and level are maintained. Refer to the technical specifications document for torque ratings and other critical performance data.

Maintenance requirement question

Regular fluid changes, filter replacements, and visual inspections are crucial for A650E transmission longevity. Follow the manufacturer's recommended maintenance schedule, typically every 30,000-50,000 miles. Fluid level checks and visual inspection of the transmission pan for debris are part of the routine. Consult the service manual for detailed maintenance procedures.

Installation or replacement question

Replacing the A650E transmission requires specialized tools and knowledge. Thorough disassembly, component inspection, and proper reassembly are essential. Consult the service manual for detailed steps, torque specifications, and precautions. Ensure proper alignment and secure mounting of all components. Seek professional assistance if unsure.

Troubleshooting question

Common A650E transmission issues include slipping, rough shifting, and low fluid levels. Start by checking fluid levels and condition. Inspect the wiring harness and connections for damage. Consult the diagnostic trouble codes (DTCs) for specific fault codes and corresponding solutions. If the problem persists, consult a certified mechanic.

Performance optimization question

Optimizing A650E transmission performance involves maintaining proper fluid levels and cleanliness. Using the recommended fluid type and conducting regular maintenance are key. Avoid harsh driving conditions and ensure proper cooling to prevent overheating. Consult the service manual for detailed performance guidelines.

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 GS A650E Transmission Service Manual (1997-2004)

Coming Soon

Comprehensive guide covering maintenance procedures, troubleshooting, and repair of the A650E transmission for Lexus GS models between 1997 and 2004.

A650E Transmission Technical Bulletin - 2001-02-15

Coming Soon

Technical bulletin addressing potential issues with the shifter linkage and improved diagnostics for A650E transmissions.

Genuine Lexus Parts Catalog (A650E)

Coming Soon

Listing of all necessary parts and accessories for A650E transmission repairs.

Legal Disclaimer

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

The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.

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.

Intellectual Property

All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

About the Author

Expert automotive knowledge and experience

ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

Facebook Contact

15+ Years

Experience

500+ Guides

Guides

50+ Makes

Vehicles

1000+ Solutions

Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

ASE Master Technician Certification
Advanced Diagnostic Specialist
Hybrid/Electric Vehicle Systems
Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.