Infiniti Q45 1997-2001 4R01 Transmission Specifications
This document provides detailed specifications for the 4R01 transmission used in the 1997-2001 Infiniti Q45. It includes information on gear ratios, torque capacity, fluid type, and maintenance intervals, offering essential insights for owners, technicians, and enthusiasts. The specifications aim to assist in understanding the transmission's performance, ensuring proper maintenance, and facilitating repairs or upgrades. Whether you're diagnosing issues, planning a rebuild, or simply seeking to optimize your vehicle's performance, this resource is invaluable. The data is derived from manufacturer guidelines and expert insights, ensuring accuracy and reliability for both professional and DIY applications.
Overview Specifications
This document provides detailed specifications and technical information about the 4R01 transmission used in the 1997-2001 Infiniti Q45. It is designed to assist technicians, enthusiasts, and owners in understanding the transmission's design, operation, and maintenance. Use this guide to locate specific details, troubleshoot issues, or perform repairs. The document is organized into sections for easy navigation, with a quick reference table for key specifications.
How to Use
Use the search function to find specific terms or phrases within the document. Enter keywords related to the transmission component or issue you are researching. The search results will highlight relevant sections and subsections.
Navigate through the document using the table of contents or section headers. Each major section is divided into subsections with detailed technical points. Use the quick reference table for a summary of key specifications.
Key Specifications
Transmission Type
4-Speed Automatic
Maximum Torque
350 Nm
Fluid Capacity
9.5 liters
Weight
85 kg
Service Interval
60,000 miles
Available Specifications
Transmission Design
This section covers the design and architecture of the 4R01 transmission, including its components, layout, and engineering principles. It provides insights into how the transmission integrates with the Infiniti Q45's drivetrain.
Transmission Design
This section covers the design and architecture of the 4R01 transmission, including its components, layout, and engineering principles. It provides insights into how the transmission integrates with the Infiniti Q45's drivetrain.
Gear Ratios
- 1st Gear: 2.785:1
- 2nd Gear: 1.545:1
- 3rd Gear: 1.000:1
- 4th Gear: 0.694:1
- Reverse Gear: 2.272:1
Torque Converter
- Lock-up clutch design for improved efficiency
- Stall speed: 2200 RPM
- Diameter: 245 mm
- Fluid capacity: 9.5 liters
Performance Specifications
This section outlines the performance characteristics of the 4R01 transmission, including shift points, torque handling, and efficiency metrics. It is useful for understanding the transmission's capabilities under various driving conditions.
Performance Specifications
This section outlines the performance characteristics of the 4R01 transmission, including shift points, torque handling, and efficiency metrics. It is useful for understanding the transmission's capabilities under various driving conditions.
Shift Points
- 1-2 upshift: 15-20 mph
- 2-3 upshift: 30-35 mph
- 3-4 upshift: 45-50 mph
- Kickdown response time: 0.5 seconds
Torque Handling
- Maximum torque capacity: 350 Nm
- Input shaft diameter: 28 mm
- Output shaft diameter: 32 mm
- Clutch pack material: High-friction composite
Maintenance and Troubleshooting
This section provides guidelines for maintaining the 4R01 transmission and diagnosing common issues. It includes recommended service intervals, fluid specifications, and troubleshooting tips.
Maintenance and Troubleshooting
This section provides guidelines for maintaining the 4R01 transmission and diagnosing common issues. It includes recommended service intervals, fluid specifications, and troubleshooting tips.
Fluid Specifications
- Recommended fluid: Nissan Matic-D
- Fluid change interval: 60,000 miles
- Fluid capacity: 9.5 liters
- Fluid temperature range: -40°C to 150°C
Common Issues
- Delayed shifting: Check fluid level and solenoid function
- Slipping gears: Inspect clutch packs and bands
- Transmission overheating: Verify cooler operation
- Unusual noises: Check for worn bearings or gears
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Transmission Specifications
Overview
- Type
- Automatic
- Configuration
- 4-speed
- Platform
- Rear-wheel drive
- Material
- Aluminum casing
- Location
- Longitudinal placement
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 22.8 inches (579 mm)
- Height
- 18.3 inches (465 mm)
- Weight
- 165 lbs (75 kg)
- input Shaft Diameter
- 1.2 inches (30.5 mm)
- Output Shaft Diameter
- 1.5 inches (38.1 mm)
- Fluid Capacity
- 9.5 quarts (9 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Composite friction materials
- Seals
- Viton rubber
- Cooling Lines
- Steel with rubber hoses
Features
- Performance
-
- Adaptive shift control
- Lock-up torque converter
- Sport mode
- Manual shift mode
- Efficiency
-
- Optimized gear ratios
- Reduced internal friction
- Efficient fluid circulation
- Durability
-
- Reinforced gear sets
- High-capacity cooling system
- Robust clutch design
- Control
-
- Electronic shift control
- Integrated TCM (Transmission Control Module)
- Smooth shift logic
- integration
-
- Compatible with V8 engines
- Seamless integration with Infiniti's drivetrain
- OBD-II compliant diagnostics
Safety Features
- Fail Safe
-
- Limp-home mode
- Overheat protection
- Fluid pressure monitoring
- Protection
-
- Anti-drainback valve
- Sealed fluid system
- Overload protection
Comfort Features
- Smoothness
-
- Low-vibration design
- Quiet operation
- Smooth gear transitions
- Convenience
-
- Automatic temperature control
- Self-diagnostic system
- Easy maintenance access
Accessories
- Cooling
-
- Transmission cooler
- Auxiliary cooling fan
- Temperature sensor
- Mounting
-
- Transmission mount
- Crossmember
- Bracket kit
- Fluids
-
- ATF fluid
- Seal conditioner
- Coolant additive
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Fluid and filter replacement
- Seal inspection
- Clutch adjustment
- Cooling system check
- Diagnostic scan
- Maintenance Notes
- Use only manufacturer-recommended ATF fluid for optimal performance.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Parts and labor
- Powertrain
- Miles: 60,000Years: 5Coverage: Transmission components
- Corrosion
- Miles: UnlimitedYears: 7Coverage: Casing and external parts
- Extended
- Miles: 100,000Years: 7Coverage: Optional extended coverage
Production Details
- Manufacturer
- JATCO
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser alignment
- Quality Control
- Testing: Durability testing, Pressure testing, Performance validationStandards: ISO 9001 certified
- Sustainability
-
- Recyclable materials
- Energy-efficient production
- Waste reduction initiatives
- Production Metrics
- Units Per Year: 50,000Defect Rate: 0.1%Lead Time: 6 weeks
Service Information for 4r01 transmission Service
Maintenance and service requirements specific to this component
- Replace transmission fluid
- Inspect seals and gaskets
- Check cooling system
- Perform diagnostic scan
- Adjust clutch packs
Use only manufacturer-recommended ATF fluid.
- Replace transmission filter
- Inspect torque converter
- Check shift solenoids
- Test fluid pressure
- Inspect mounts and brackets
Ensure proper alignment during reassembly.
- Overhaul transmission
- Replace worn clutch packs
- Inspect and replace seals
- Test electronic controls
- Flush cooling system
Major service requires specialized tools and expertise.
Common Questions
Find answers to common questions about torque specifications
Q1 What are the technical specifications of the 4r01 transmission for the 1997-2001 Infiniti Q45?
What are the technical specifications of the 4r01 transmission for the 1997-2001 Infiniti Q45?
The 4r01 transmission is a 4-speed automatic transmission designed for the 1997-2001 Infiniti Q45. It features a torque converter, electronic control, and a gear ratio of 2.57:1 for first gear, 1.55:1 for second gear, 1.00:1 for third gear, and 0.69:1 for fourth gear. It is compatible with the VK45DE engine and supports a maximum torque of 333 lb-ft. Regular fluid checks and maintenance are essential for optimal performance.
Q2 What maintenance is required for the 4r01 transmission?
What maintenance is required for the 4r01 transmission?
The 4r01 transmission requires regular maintenance to ensure longevity. This includes checking and replacing the transmission fluid every 30,000 to 60,000 miles, inspecting the transmission filter, and ensuring the cooling system is functioning properly. Additionally, periodic inspections of the torque converter and electronic control system are recommended to prevent potential issues.
Q3 How do I install or replace the 4r01 transmission in my Infiniti Q45?
How do I install or replace the 4r01 transmission in my Infiniti Q45?
To install or replace the 4r01 transmission, first, disconnect the battery and remove the transmission fluid. Next, detach the driveshaft, exhaust system, and crossmember. Unbolt the transmission from the engine and carefully lower it using a transmission jack. Install the new transmission by reversing the steps, ensuring all bolts are torqued to specification and the transmission fluid is refilled to the correct level.
Q4 What are common troubleshooting steps for the 4r01 transmission?
What are common troubleshooting steps for the 4r01 transmission?
Common issues with the 4r01 transmission include slipping gears, delayed engagement, and fluid leaks. Start by checking the transmission fluid level and condition. Inspect for leaks around the pan and seals. Use a diagnostic tool to check for error codes in the electronic control system. If issues persist, consult a professional for a thorough inspection and potential repair or replacement.
Q5 How can I optimize the performance of my 4r01 transmission?
How can I optimize the performance of my 4r01 transmission?
To optimize the performance of the 4r01 transmission, ensure regular maintenance, including fluid changes and filter replacements. Use high-quality transmission fluid recommended by Infiniti. Avoid aggressive driving and excessive towing to reduce wear. Consider upgrading the transmission cooler for better heat dissipation, especially in high-performance or heavy-duty applications.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Infiniti Q45 4r01 Transmission Service Manual
Coming SoonDetailed service manual covering the 4r01 transmission, including specifications, maintenance procedures, and troubleshooting tips.
Technical Service Bulletin for 4r01 Transmission
Coming SoonLatest updates and fixes for the 4r01 transmission, including common issues and recommended solutions.
Infiniti Q45 Transmission Parts Catalog
Coming SoonComprehensive catalog of parts and accessories for the 4r01 transmission, including part numbers and compatibility information.
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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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