Pontiac Pontiac G8 2008-2009 5L40 Transmission Specifications
This document provides detailed specifications for the 5L40 transmission used in the 2008-2009 Pontiac G8. The 5L40 is a 5-speed automatic transmission designed for smooth shifting and optimal performance. Specifications include gear ratios, torque capacity, fluid type, and maintenance intervals. These details are essential for owners, technicians, and enthusiasts to understand the transmission's capabilities, ensure proper maintenance, and troubleshoot issues. Whether you're performing routine service, diagnosing problems, or considering upgrades, this comprehensive guide offers valuable insights to help you maintain or enhance your Pontiac G8's performance and reliability.
Overview Specifications
This document provides detailed specifications and technical information about the 5L40 transmission used in the 2008-2009 Pontiac G8. It covers key features, maintenance tips, and performance details. Use this guide to understand the transmission's capabilities, troubleshoot issues, and ensure proper care. Whether you're a mechanic, enthusiast, or owner, this resource will help you navigate the technical aspects of the 5L40 transmission efficiently.
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Key Specifications
Transmission Type
5-Speed Automatic
Torque Capacity
332 lb-ft (450 Nm)
Weight
165 lbs (75 kg)
Maximum Engine Speed
6500 RPM
Warranty
5 years/60,000 miles
Available Specifications
Technical Specifications
This section outlines the core technical specifications of the 5L40 transmission, including gear ratios, torque capacity, and fluid requirements. It provides essential data for understanding the transmission's performance and compatibility.
Technical Specifications
This section outlines the core technical specifications of the 5L40 transmission, including gear ratios, torque capacity, and fluid requirements. It provides essential data for understanding the transmission's performance and compatibility.
Gear Ratios
- 1st Gear: 3.06:1
- 2nd Gear: 1.75:1
- 3rd Gear: 1.34:1
- 4th Gear: 1.00:1
- 5th Gear: 0.74:1
- Reverse Gear: 2.29:1
Fluid Requirements
- Fluid Type: Dexron VI ATF
- Fluid Capacity: 7.4 quarts (7 liters)
- Fluid Change Interval: 50,000 miles (80,000 km)
- Fluid Temperature Range: -40°F to 302°F (-40°C to 150°C)
Performance Features
This section highlights the performance features of the 5L40 transmission, including its adaptive shift logic, smooth gear transitions, and durability. Learn how these features enhance driving experience and reliability.
Performance Features
This section highlights the performance features of the 5L40 transmission, including its adaptive shift logic, smooth gear transitions, and durability. Learn how these features enhance driving experience and reliability.
Adaptive Shift Logic
- Automatically adjusts shift patterns based on driving conditions
- Improves fuel efficiency and performance
- Reduces wear and tear on components
- Enhances responsiveness in sport mode
Durability and Reliability
- Designed for high torque applications
- Robust construction for long service life
- Minimal maintenance requirements
- Compatible with heavy-duty driving conditions
Maintenance and Troubleshooting
This section provides guidance on maintaining and troubleshooting the 5L40 transmission. It includes tips for fluid changes, common issues, and diagnostic steps to ensure optimal performance.
Maintenance and Troubleshooting
This section provides guidance on maintaining and troubleshooting the 5L40 transmission. It includes tips for fluid changes, common issues, and diagnostic steps to ensure optimal performance.
Fluid Change Procedure
- Warm up the transmission to operating temperature
- Drain the old fluid and replace the filter
- Refill with Dexron VI ATF to the correct level
- Check for leaks and test drive
Common Issues
- Delayed or harsh shifts
- Transmission slipping
- Fluid leaks
- Check engine light with transmission codes
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Transmission Specifications
Overview
- Type
- Automatic
- Configuration
- 5-speed
- Platform
- GM RWD/AWD
- Material
- Aluminum case
- Location
- Rear-wheel drive
Dimensions
- Length
- 24.8 inches (630 mm)
- Width
- 17.7 inches (450 mm)
- Height
- 14.2 inches (360 mm)
- Weight
- 165 lbs (75 kg)
- input Shaft Diameter
- 1.2 inches (30 mm)
- Output Shaft Diameter
- 1.4 inches (35 mm)
- Fluid Capacity
- 7.4 quarts (7 liters)
Materials
- Case
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Plates
- Composite friction material
- Seals
- Synthetic rubber
Features
- Performance
-
- Adaptive shift control
- Sport mode
- Manual shift capability
- Efficiency
-
- Lock-up torque converter
- Electronic pressure control
- Optimized gear ratios
- Durability
-
- Reinforced internals
- High-capacity cooling system
- Corrosion-resistant coating
- Technology
-
- Electronic control module
- Integrated sensors
- CAN bus communication
Safety Features
- Protection
-
- Overheat protection
- Low fluid shutdown
- Fail-safe mode
- Monitoring
-
- Transmission temperature sensor
- Fluid pressure sensor
Comfort Features
- Smoothness
-
- Smooth shift transitions
- Reduced vibration
- Quiet operation
- Convenience
-
- Automatic shifting
- Sport mode for aggressive driving
- Manual mode for control
Accessories
- Tools
-
- Transmission jack
- Torque wrench
- Fluid pump
- Fluids
-
- Dexron VI transmission fluid
- Seal conditioner
- Flush solution
- Parts
-
- Filter kit
- Gasket set
- Solenoid pack
Maintenance
- Service interval
-
- Fluid change every 30,000 miles
- Filter replacement every 60,000 miles
- Seal inspection every 50,000 miles
- Notes
-
- Use only Dexron VI fluid
- Avoid overheating
- Regularly check fluid level
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Parts and labor
- Powertrain
- Miles: 60,000Years: 5Coverage: Major components
- Corrosion
- Miles: 100,000Years: 6Coverage: Perforation only
- Emissions
- Miles: 50,000Years: 2Coverage: Federal requirements
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- Casting
- Machining
- Heat treatment
- Assembly
- Quality Control
- inspection: 100% component testingTesting: Durability and performance testsStandards: ISO 9001 compliant
- Sustainability
-
- Recycled aluminum usage
- Efficient manufacturing processes
- Waste reduction initiatives
- Production Metrics
- Units Per Day: 1,000Defect Rate: 0.05%Energy Usage: 500 kWh per unit
Service Information for 5l40 transmission Service
Maintenance and service requirements specific to this component
- Fluid and filter change
- Inspect seals and gaskets
- Check transmission mounts
- Test electronic controls
Use Dexron VI fluid only
- Replace filter and fluid
- Inspect clutch plates
- Check solenoid pack
- Test shift quality
Requires diagnostic tool
- Full transmission flush
- Replace seals and gaskets
- Inspect torque converter
- Test all sensors
Major service may require removal
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 5L40 transmission compatible with other Pontiac models?
Is the 5L40 transmission compatible with other Pontiac models?
The 5L40 transmission is specifically designed for the 2008-2009 Pontiac G8. While it may share similarities with other GM transmissions, compatibility with other Pontiac models is not guaranteed. Always verify part numbers and consult technical specifications before attempting installation in other vehicles.
Q2 What are the maintenance requirements for the 5L40 transmission?
What are the maintenance requirements for the 5L40 transmission?
The 5L40 transmission requires regular maintenance to ensure optimal performance. This includes fluid and filter changes every 30,000-50,000 miles, inspection of seals and gaskets, and periodic checks for leaks or unusual noises. Follow the manufacturer’s guidelines for specific intervals and use only recommended fluids.
Q3 How do I install or replace the 5L40 transmission in a Pontiac G8?
How do I install or replace the 5L40 transmission in a Pontiac G8?
Installing or replacing the 5L40 transmission involves several steps: disconnect the battery, remove the driveshaft and exhaust components, detach the transmission mounts and linkages, and carefully lower the transmission. Reinstallation requires aligning the transmission with the engine, reattaching components, and refilling with the correct fluid. Always consult a service manual for detailed instructions.
Q4 What should I do if my 5L40 transmission is slipping or shifting hard?
What should I do if my 5L40 transmission is slipping or shifting hard?
If your 5L40 transmission is slipping or shifting hard, start by checking the fluid level and condition. Low or contaminated fluid can cause these issues. Inspect for leaks, damaged seals, or worn components. If problems persist, a diagnostic scan tool can help identify error codes. Consult a professional for repairs or adjustments.
Q5 How can I optimize the performance of my 5L40 transmission?
How can I optimize the performance of my 5L40 transmission?
To optimize the performance of your 5L40 transmission, ensure regular maintenance, use high-quality fluids, and avoid excessive load or towing. Consider upgrading the transmission cooler for better thermal management. Additionally, a professional tune-up can improve shift timing and responsiveness, enhancing overall performance.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Pontiac G8 5L40 Transmission Service Manual
Coming SoonDetailed service manual covering installation, maintenance, and troubleshooting for the 5L40 transmission in the 2008-2009 Pontiac G8.
Technical Service Bulletin for 5L40 Transmission
Coming SoonOfficial technical bulletin addressing common issues and updates for the 5L40 transmission in Pontiac G8 models.
Pontiac G8 Transmission Parts Catalog
Coming SoonComprehensive catalog listing replacement parts and accessories for the 5L40 transmission in the 2008-2009 Pontiac G8.
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Important information about using this content
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General Information
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.
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