Lexus LS 1995-2000 A650 Transmission Specifications
This document provides a detailed overview of the A650 transmission specifications for the 1995-2000 Lexus LS. It includes critical technical details such as gear ratios, torque capacity, fluid requirements, and maintenance intervals. These specifications are essential for owners, technicians, and enthusiasts seeking to understand the transmission's performance, ensure proper maintenance, or plan upgrades. The information is derived from factory service manuals and technical bulletins, offering accurate and reliable data. Whether you're diagnosing issues, performing repairs, or optimizing performance, this resource serves as a comprehensive guide to the A650 transmission system.
Overview Specifications
This document provides detailed technical specifications and operational insights for the A650 transmission used in the 1995-2000 Lexus LS models. It is designed to assist technicians, enthusiasts, and owners in understanding the transmission's design, functionality, and maintenance requirements. Use the search and navigation instructions to quickly locate specific information or browse through sections for a comprehensive understanding of the A650 transmission.
How to Use
Use the search functionality by entering keywords related to the A650 transmission, such as 'gear ratios' or 'fluid capacity'. This will highlight relevant sections and subsections for quick access.
Navigate through the document by scrolling through the sections or using the table of contents. Each section is clearly labeled and contains subsections with detailed technical points for easy reference.
Key Specifications
Transmission Type
5-speed automatic
Maximum Torque
320 lb-ft
Fluid Capacity
7.5 quarts
Gear Ratios
3.357:1 to 0.753:1
Weight
180 lbs
Available Specifications
Transmission Design
This section covers the structural and mechanical design of the A650 transmission, including its layout, components, and engineering principles. It provides insights into how the transmission integrates with the Lexus LS drivetrain.
Transmission Design
This section covers the structural and mechanical design of the A650 transmission, including its layout, components, and engineering principles. It provides insights into how the transmission integrates with the Lexus LS drivetrain.
Gear Configuration
- 5-speed automatic transmission
- Longitudinal mounting configuration
- Planetary gearset design for smooth shifting
- Overdrive gear for improved fuel efficiency
- Lock-up torque converter for reduced slippage
- Electronically controlled shifting mechanism
Material and Construction
- High-strength aluminum alloy housing
- Precision-machined gears for durability
- Heat-treated components for longevity
- Sealed bearings to minimize friction
- Integrated cooling system for optimal performance
Performance Specifications
This section outlines the performance metrics of the A650 transmission, including gear ratios, torque capacity, and shift response times. It is essential for understanding the transmission's capabilities and limitations.
Performance Specifications
This section outlines the performance metrics of the A650 transmission, including gear ratios, torque capacity, and shift response times. It is essential for understanding the transmission's capabilities and limitations.
Gear Ratios
- 1st gear: 3.357:1
- 2nd gear: 1.955:1
- 3rd gear: 1.310:1
- 4th gear: 1.000:1
- 5th gear: 0.753:1
- Reverse gear: 3.000:1
Torque and Power Handling
- Maximum torque capacity: 320 lb-ft
- Designed for V8 engines up to 4.0L
- Smooth power delivery under heavy loads
- Adaptive shift logic for varying driving conditions
- Enhanced durability for high-performance applications
Maintenance and Service
This section provides guidelines for maintaining and servicing the A650 transmission. It includes fluid specifications, inspection intervals, and common troubleshooting tips to ensure long-term reliability.
Maintenance and Service
This section provides guidelines for maintaining and servicing the A650 transmission. It includes fluid specifications, inspection intervals, and common troubleshooting tips to ensure long-term reliability.
Fluid Requirements
- Recommended fluid: Toyota Type T-IV ATF
- Fluid capacity: 7.5 quarts (with torque converter)
- Fluid change interval: Every 60,000 miles
- Use of synthetic fluid for extended life
- Proper fluid level check procedure
Common Issues and Solutions
- Delayed shifting: Check fluid level and condition
- Transmission overheating: Inspect cooling system
- Unusual noises: Examine gearset and bearings
- Slipping gears: Verify torque converter operation
- Error codes: Use diagnostic tools for troubleshooting
Search Specifications
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Transmission Specifications
Overview
- Type
- Automatic
- Configuration
- 5-speed
- Platform
- Rear-wheel drive
- Material
- Aluminum alloy casing
- Location
- Mounted longitudinally
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
- 1.5 inches (38.1 mm)
- Fluid Capacity
- 7.5 quarts (7.1 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Composite friction materials
- Seals
- Viton rubber
- Bearings
- High-carbon steel
Features
- Shifting
-
- Electronic shift control
- Adaptive shift logic
- Manual mode with sequential shifting
- Cooling
-
- Integrated transmission cooler
- Fluid temperature sensor
- Auxiliary cooling fins
- Durability
-
- Reinforced gear train
- High-strength input shaft
- Corrosion-resistant casing
- Performance
-
- Smooth torque transfer
- Quick shift response
- Optimized gear ratios
- Safety
-
- Fail-safe mode
- Overheat protection
- Shift lock mechanism
Safety Features
- Electronic Controls
-
- Shift interlock system
- Reverse lockout
- Mechanical Protections
-
- Overload protection
- Torque converter lockup
- Monitoring Systems
-
- Fluid level sensor
- Temperature warning system
Comfort Features
- Noise Reduction
-
- Precision gear machining
- Vibration dampening mounts
- Smoothness
-
- Adaptive shift programming
- Torque converter tuning
- Convenience
-
- Paddle shifters (optional)
- Auto-hold function
- Climate Control
-
- Transmission fluid heater
- Cooling system integration
Accessories
- Performance Upgrades
-
- High-capacity cooler
- Upgraded clutch packs
- Performance shift kit
- Maintenance Tools
-
- Fluid exchange kit
- Filter replacement kit
- Diagnostic scanner
- Cosmetic
-
- Polished casing cover
- Custom shift knob
- Decorative transmission plate
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Fluid and filter replacement
- Seal inspection
- Shift linkage adjustment
- Mount inspection
- Diagnostic scan
- Maintenance Notes
- Use only manufacturer-recommended fluid. Avoid overheating during heavy use.
Warranty
- Basic
- Miles: 50,000Years: 4Coverage: Parts and labor
- Powertrain
- Miles: 100,000Years: 7Coverage: Major components
- Corrosion
- Miles: UnlimitedYears: 6Coverage: Casing and external parts
- Extended
- Miles: 120,000Years: 10Coverage: Optional extended coverage
Production Details
- Manufacturer
- Aisin Seiki Co., Ltd.
- Manufacturing Process
-
- Precision CNC machining
- Heat treatment of gears
- Automated assembly
- Quality Control
- Testing: Durability testing, Shift performance testing, Leak testingStandards: ISO 9001 certified
- Sustainability Practices
-
- Recycled aluminum usage
- Waste reduction initiatives
- Energy-efficient manufacturing
- Production Metrics
- Annual Output: 150,000 unitsDefect Rate: 0.02%Lead Time: 6 weeks
Service Information for a650 transmission Service
Maintenance and service requirements specific to this component
- Transmission fluid replacement
- Filter replacement
- Seal inspection
- Shift linkage adjustment
- Diagnostic scan
Use only manufacturer-recommended fluid.
- Fluid and filter replacement
- Mount inspection
- Cooling system check
- Shift performance test
- Electronic control unit update
Inspect for leaks and wear.
- Complete fluid flush
- Clutch pack inspection
- Torque converter check
- Bearing replacement if needed
- Full diagnostic overhaul
Major service may require specialized tools.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the A650 transmission compatible with other Lexus models from 1995-2000?
Is the A650 transmission compatible with other Lexus models from 1995-2000?
The A650 transmission is specifically designed for the 1995-2000 Lexus LS400. While it shares some design similarities with other Lexus models, it is not directly compatible due to differences in mounting points, electronics, and torque ratings. Always verify compatibility using the vehicle's VIN or consult a Lexus service manual before attempting installation in other models.
Q2 What are the maintenance requirements for the A650 transmission?
What are the maintenance requirements for the A650 transmission?
The A650 transmission requires regular maintenance to ensure longevity. This includes fluid changes every 60,000 miles, filter replacement every 100,000 miles, and periodic inspection of seals and mounts. Use only Lexus-approved ATF Type T-IV fluid. Neglecting maintenance can lead to premature wear, slipping gears, or transmission failure.
Q3 How do I replace the A650 transmission in a 1995-2000 Lexus LS400?
How do I replace the A650 transmission in a 1995-2000 Lexus LS400?
Replacing the A650 transmission involves several steps: 1) Disconnect the battery and drain the transmission fluid. 2) Remove the driveshaft, exhaust components, and crossmember. 3) Disconnect electrical connectors and shift linkage. 4) Support the transmission with a jack and remove mounting bolts. 5) Carefully lower and remove the transmission. Installation is the reverse process, ensuring proper torque on all bolts and alignment of components.
Q4 What should I do if my A650 transmission is slipping or shifting hard?
What should I do if my A650 transmission is slipping or shifting hard?
If your A650 transmission is slipping or shifting hard, start by checking the fluid level and condition. Low or contaminated fluid can cause these issues. If the fluid is fine, inspect the shift solenoids, throttle position sensor, and transmission control module for faults. A professional diagnostic scan tool can help identify error codes and pinpoint the problem.
Q5 How can I optimize the performance of my A650 transmission?
How can I optimize the performance of my A650 transmission?
To optimize the A650 transmission's performance, ensure regular fluid changes with high-quality ATF Type T-IV. Avoid aggressive driving and excessive towing to reduce wear. Consider upgrading the transmission cooler for better heat dissipation. Regularly inspect and replace worn mounts and bushings to maintain proper alignment and reduce vibrations.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1995-2000 Lexus LS400 Service Manual
Coming SoonComprehensive service manual covering the A650 transmission, including specifications, maintenance procedures, and troubleshooting guides.
A650 Transmission Technical Service Bulletin
Coming SoonTechnical bulletin addressing common issues, updates, and recommended fixes for the A650 transmission in the 1995-2000 Lexus LS400.
Lexus LS400 Parts and Accessories Catalog
Coming SoonDetailed catalog of OEM and aftermarket parts for the 1995-2000 Lexus LS400, including transmission components and accessories.
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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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