Pontiac Pontiac Grand Am 1999-2005 4T45 Transmission Specifications
This document provides detailed specifications for the 4T45 transmission used in the 1999-2005 Pontiac Grand Am. It includes critical information such as gear ratios, fluid capacity, torque converter specifications, and shift points. These specifications are essential for mechanics, enthusiasts, and owners performing maintenance, repairs, or upgrades. Understanding these details ensures proper transmission operation, enhances performance, and prevents costly repairs. This resource is invaluable for diagnosing issues, selecting compatible parts, and optimizing the transmission's lifespan. Whether you're servicing your vehicle or upgrading its performance, these specifications offer the technical insights needed to make informed decisions.
Overview Specifications
This document provides detailed specifications and technical information about the 4T45-E automatic transmission used in the 1999-2005 Pontiac Grand Am. It is designed to assist mechanics, enthusiasts, and owners in understanding the transmission's features, maintenance requirements, and performance characteristics. Use the search and navigation instructions to quickly locate specific details or browse through the sections for a comprehensive understanding of the 4T45-E transmission.
How to Use
Use the search bar to enter keywords related to the 4T45-E transmission, such as 'torque converter' or 'fluid capacity'. Results will highlight relevant sections and subsections for quick access.
Scroll through the sections or use the table of contents to jump to specific topics. Each section is organized into subsections with detailed technical points for easy reference.
Key Specifications
Transmission Type
4-speed automatic
Fluid Capacity
7.4 quarts
Torque Capacity
258 lb-ft
Gear Ratios
2.84, 1.60, 1.00, 0.70
Towing Capacity
1,000 lbs
Available Specifications
General Specifications
This section covers the basic specifications of the 4T45-E transmission, including its design, compatibility, and key features. It provides an overview of the transmission's capabilities and intended use in the Pontiac Grand Am.
General Specifications
This section covers the basic specifications of the 4T45-E transmission, including its design, compatibility, and key features. It provides an overview of the transmission's capabilities and intended use in the Pontiac Grand Am.
Design and Compatibility
- 4-speed automatic transmission
- Designed for front-wheel-drive vehicles
- Compatible with 2.2L and 2.4L engines
- Hydraulically controlled with electronic shift solenoids
- Includes a lock-up torque converter
- Manufactured by General Motors
Key Features
- Overdrive for improved fuel efficiency
- Adaptive shift control for smooth operation
- Durable construction for long-term reliability
- Compact design for easy installation
- Integrated pressure control system
- Compatible with GM Dexron III transmission fluid
Performance and Maintenance
This section outlines the performance characteristics of the 4T45-E transmission and provides maintenance guidelines to ensure optimal operation. It includes details on fluid capacity, service intervals, and common issues.
Performance and Maintenance
This section outlines the performance characteristics of the 4T45-E transmission and provides maintenance guidelines to ensure optimal operation. It includes details on fluid capacity, service intervals, and common issues.
Performance Metrics
- Maximum torque capacity: 258 lb-ft
- Gear ratios: 2.84 (1st), 1.60 (2nd), 1.00 (3rd), 0.70 (4th)
- Shift points optimized for fuel economy and performance
- Smooth and responsive shifting under normal conditions
- Designed for city and highway driving
- Supports towing up to 1,000 lbs
Maintenance Guidelines
- Transmission fluid capacity: 7.4 quarts (with filter change)
- Recommended fluid: GM Dexron III or equivalent
- Fluid change interval: Every 50,000 miles
- Inspect for leaks and wear during routine service
- Replace transmission filter every 100,000 miles
- Monitor for signs of slipping or delayed shifts
Common Issues and Troubleshooting
This section highlights common problems associated with the 4T45-E transmission and provides troubleshooting tips to diagnose and resolve issues. It also includes recommendations for repairs and upgrades.
Common Issues and Troubleshooting
This section highlights common problems associated with the 4T45-E transmission and provides troubleshooting tips to diagnose and resolve issues. It also includes recommendations for repairs and upgrades.
Common Problems
- Delayed or harsh shifting
- Transmission fluid leaks
- Torque converter clutch failure
- Solenoid or valve body issues
- Overheating due to inadequate cooling
- Worn-out internal components
Troubleshooting Tips
- Check transmission fluid level and condition
- Inspect for leaks around seals and gaskets
- Test solenoid operation with a diagnostic tool
- Monitor transmission temperature during operation
- Replace worn or damaged components promptly
- Consider upgrading to a heavy-duty torque converter
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Transmission Specifications
Overview
- Type
- Automatic
- Configuration
- Transverse-mounted
- Platform
- GM4T
- Material
- Aluminum case
- Location
- Front-wheel drive
Dimensions
- Length
- 22.5 inches (571.5 mm)
- Width
- 18.3 inches (464.8 mm)
- Height
- 12.7 inches (322.6 mm)
- Weight
- 145 lbs (65.8 kg)
- input Shaft Length
- 7.8 inches (198.1 mm)
- Output Shaft Length
- 8.9 inches (226.1 mm)
- Fluid Capacity
- 7.4 quarts (7.0 liters)
Materials
- Case
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Plates
- Friction material
- Seals
- Viton rubber
- Sensors
- Plastic and metal composite
Features
- Transmission Control
-
- Electronic shift control
- Adaptive shift programming
- Manual shift mode
- Fluid Management
-
- Sealed fluid system
- Internal oil pump
- Fluid temperature sensor
- Performance
-
- 4-speed automatic
- Torque converter lockup
- Smooth shift transitions
- Diagnostics
-
- On-board diagnostics (OBD-II)
- Shift solenoid monitoring
- Fluid pressure sensors
- Durability
-
- Hardened gear sets
- High-strength case
- Heat-treated components
Safety Features
- Fail Safe
-
- Limp-home mode
- Shift interlock system
- Monitoring
-
- Fluid level sensor
- Overheat protection
- Mechanical
-
- Torque converter lockup
- Parking pawl
Comfort Features
- Shift Quality
-
- Smooth engagement
- Adaptive shift points
- Noise Reduction
-
- Internal dampening
- Quiet gear meshing
- Drivability
-
- Low vibration
- Consistent performance
- User interface
-
- Easy shift lever operation
- Clear gear indicator
Accessories
- Fluid
-
- ATF+4 transmission fluid
- Fluid filter kit
- Pan gasket
- Sensors
-
- Speed sensor
- Temperature sensor
- Pressure sensor
- Tools
-
- Transmission jack adapter
- Fluid pump
- Torque wrench
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Fluid and filter change
- Pan gasket replacement
- Sensor inspection
- Shift linkage adjustment
- Fluid level check
- Notes
- Use only recommended ATF+4 fluid for optimal performance.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Manufacturer defects
- Powertrain
- Miles: 60,000Years: 5Coverage: Transmission and drivetrain
- Corrosion
- Miles: 100,000Years: 6Coverage: Rust perforation
- Emissions
- Miles: 80,000Years: 8Coverage: Emissions-related components
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- Casting
- Machining
- Heat treatment
- Assembly
- Quality Control
- inspection: 100% component testingTesting: Durability and performance validationCertification: ISO 9001
- Sustainability
-
- Recycled materials
- Energy-efficient manufacturing
- Waste reduction programs
- Production Metrics
- Annual Output: 500,000 unitsProduction Time: 12 hours per unitDefect Rate: 0.5%
Service Information for 4t45 transmission Service
Maintenance and service requirements specific to this component
- Replace transmission fluid
- Replace fluid filter
- Inspect shift linkage
- Check fluid level
- Inspect seals for leaks
Use only ATF+4 fluid for best results.
- Inspect torque converter
- Check solenoid operation
- Test fluid pressure
- Inspect internal components
- Replace pan gasket
Special tools required for internal inspection.
- Overhaul transmission
- Replace clutch plates
- Inspect gear sets
- Test shift performance
- Replace worn components
Full disassembly required for overhaul.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 4T45 transmission compatible with other Pontiac models?
Is the 4T45 transmission compatible with other Pontiac models?
The 4T45 transmission, used in the 1999-2005 Pontiac Grand-Am, is specifically designed for this model and its engine configurations. While it shares similarities with transmissions in other GM vehicles, direct compatibility is limited. Always verify part numbers and consult technical specifications before attempting cross-model installations. Incorrect compatibility can lead to performance issues or damage.
Q2 What is the recommended maintenance schedule for the 4T45 transmission?
What is the recommended maintenance schedule for the 4T45 transmission?
The 4T45 transmission requires regular maintenance to ensure longevity. Change the transmission fluid every 30,000 to 50,000 miles, depending on driving conditions. Inspect the filter and replace it if clogged or damaged. Check for leaks, unusual noises, or shifting issues periodically. Regular maintenance prevents wear and ensures optimal performance.
Q3 How do I replace the 4T45 transmission in a Pontiac Grand-Am?
How do I replace the 4T45 transmission in a Pontiac Grand-Am?
Replacing the 4T45 transmission involves several steps. First, disconnect the battery and drain the transmission fluid. Remove the driveshaft, exhaust components, and transmission mount. Disconnect electrical connectors and shift linkage. Lower the transmission carefully using a jack. Install the new transmission in reverse order, ensuring proper alignment and torque specifications. Refill with recommended fluid.
Q4 What are common troubleshooting steps for the 4T45 transmission?
What are common troubleshooting steps for the 4T45 transmission?
Common issues include slipping, delayed shifting, or fluid leaks. Start by checking the fluid level and condition. Inspect for leaks around the pan and seals. Use a diagnostic tool to check for error codes. Test the solenoid and pressure control systems. Replace worn components like the filter or gaskets. Persistent issues may require professional diagnosis.
Q5 How can I optimize the performance of the 4T45 transmission?
How can I optimize the performance of the 4T45 transmission?
To optimize performance, use high-quality transmission fluid and ensure proper fluid levels. Regularly inspect and replace the filter. Avoid aggressive driving and heavy loads. Consider upgrading the cooler for better heat dissipation. Use a performance tune to adjust shift points and pressure. Proper maintenance and driving habits enhance longevity 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.
1999-2005 Pontiac Grand-Am Service Manual
Coming SoonComprehensive manual covering repair, maintenance, and troubleshooting for the 4T45 transmission and other components.
4T45 Transmission Technical Service Bulletin
Coming SoonOfficial bulletin addressing common issues, updates, and fixes for the 4T45 transmission.
Pontiac Grand-Am Parts Catalog
Coming SoonDetailed catalog of OEM and aftermarket parts for the 1999-2005 Pontiac Grand-Am, including transmission components.
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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.
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