Cadillac CT6 2016-2020 8L45 Transmission Specifications
This document provides detailed specifications for the 8L45 transmission used in the 2016-2020 Cadillac CT6. Covering technical aspects such as gear ratios, torque capacity, fluid type, and service intervals, this guide is essential for owners, technicians, and enthusiasts. The 8L45 transmission is an 8-speed automatic transmission designed for performance and efficiency, making it a critical component of the CT6's driving experience. The specifications included here help ensure proper maintenance, troubleshooting, and upgrades. Whether you're performing routine service or diagnosing a problem, this resource offers valuable insights into the transmission's design and operation. By understanding these specifications, you can optimize the performance and longevity of your Cadillac CT6's transmission.
Overview Specifications
This document provides detailed specifications and technical information about the 8L45 transmission used in the 2016-2020 Cadillac CT6. It is designed to assist technicians, engineers, and enthusiasts in understanding the transmission's features, performance, and maintenance requirements. Use the search functionality to locate specific terms or navigate through sections to explore detailed information on various aspects of the transmission.
How to Use
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Key Specifications
Gear Count
8
Torque Capacity
450 lb-ft
Weight
78 kg
Fluid Capacity
9.5 liters
Shift Time
0.2 seconds
Available Specifications
Transmission Design
This section covers the design and architecture of the 8L45 transmission, including its components, construction, and engineering principles. Learn about the transmission's layout, materials used, and how it integrates with the vehicle's drivetrain.
Transmission Design
This section covers the design and architecture of the 8L45 transmission, including its components, construction, and engineering principles. Learn about the transmission's layout, materials used, and how it integrates with the vehicle's drivetrain.
Gear Configuration
- 8-speed automatic transmission
- Compact and lightweight design
- Optimized gear ratios for performance and efficiency
- Enhanced torque capacity for high-performance applications
- Seamless shifting with minimal lag
Construction Materials
- High-strength aluminum casing
- Precision-machined gears
- Durable clutch plates
- Advanced thermal management components
- Corrosion-resistant coatings
Performance Features
Explore the performance characteristics of the 8L45 transmission, including its responsiveness, efficiency, and adaptability. This section highlights how the transmission enhances the driving experience in the Cadillac CT6.
Performance Features
Explore the performance characteristics of the 8L45 transmission, including its responsiveness, efficiency, and adaptability. This section highlights how the transmission enhances the driving experience in the Cadillac CT6.
Shifting Dynamics
- Quick and precise gear changes
- Adaptive shift algorithms
- Sport mode for aggressive driving
- Manual shift control via paddle shifters
- Smooth transitions between gears
Efficiency Enhancements
- Reduced internal friction
- Optimized hydraulic systems
- Improved fuel economy
- Lower CO2 emissions
- Energy-efficient lubrication
Maintenance and Service
This section provides essential information on maintaining and servicing the 8L45 transmission. Learn about recommended service intervals, common issues, and best practices for ensuring longevity and reliability.
Maintenance and Service
This section provides essential information on maintaining and servicing the 8L45 transmission. Learn about recommended service intervals, common issues, and best practices for ensuring longevity and reliability.
Service Intervals
- Fluid change recommended every 50,000 miles
- Inspect transmission seals and gaskets regularly
- Check for software updates periodically
- Monitor fluid levels and condition
- Follow manufacturer's maintenance schedule
Common Issues
- Delayed shifting in cold conditions
- Fluid leaks from seals or gaskets
- Unusual noises during operation
- Software glitches affecting performance
- Wear and tear on clutch components
Search Specifications
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Transmission Specifications
Overview
- Type
- 8-speed automatic
- Configuration
- Longitudinal
- Platform
- GM Alpha platform
- Material
- Aluminum casing
- Location
- Rear-wheel drive/AWD
Dimensions
- Length
- 27.5 inches (698.5 mm)
- Width
- 18.3 inches (464.8 mm)
- Height
- 12.6 inches (320 mm)
- Weight
- 187 lbs (84.8 kg)
- input Shaft Diameter
- 1.2 inches (30.5 mm)
- Output Shaft Diameter
- 1.5 inches (38.1 mm)
- Oil Capacity
- 9.5 quarts (9 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutches
- Carbon fiber composite
- Seals
- Synthetic rubber
Features
- Performance
-
- Quick shift response
- Adaptive shift control
- Sport mode
- Manual shift mode
- Efficiency
-
- Optimized gear ratios
- Reduced internal friction
- Lightweight design
- Enhanced thermal management
- Technology
-
- Electronic precision shift
- Integrated control module
- Torque converter lockup
- Active fuel management
- Durability
-
- High-strength components
- Robust cooling system
- Corrosion-resistant materials
- Extended service intervals
Safety Features
- Protection
-
- Overheat protection
- Overload protection
- Monitoring
-
- Real-time diagnostics
- Transmission fluid level sensor
- Fail-Safe
-
- Limp-home mode
- Emergency neutral
Comfort Features
- Smoothness
-
- Seamless gear shifts
- Low noise levels
- Vibration damping
- Convenience
-
- Paddle shifters
- Auto stop/start compatibility
- Hill start assist
Accessories
- Performance
-
- Transmission cooler
- Upgraded torque converter
- Shift kit
- Maintenance
-
- Transmission fluid
- Filter kit
- Gasket set
- Diagnostic
-
- OBD-II scanner
- Transmission software update
- Pressure test kit
Maintenance
- Service interval
- Every 45,000 miles or 48 months
- Service Items
-
- Fluid and filter replacement
- Seal inspection
- Clutch pack check
- Shift solenoid test
- Oil pan inspection
- Note
- Use only GM-approved transmission fluid
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain
- Miles: 60,000Years: 5Coverage: Major components
- Corrosion
- Miles: UnlimitedYears: 6Coverage: Perforation only
- Emissions
- Miles: 80,000Years: 8Coverage: Federal emissions
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- Precision machining
- Automated assembly
- Quality control testing
- Quality Control
- inspection: 100% component testingTesting: Dynamic performance testingCertification: ISO 9001 compliant
- Sustainability
-
- Recycled materials
- Energy-efficient manufacturing
- Reduced waste
- Production Metrics
- Units Per Year: 150,000Defect Rate: <0.1%
Service Information for 8l45 transmission Service
Maintenance and service requirements specific to this component
- Replace transmission fluid
- Replace transmission filter
- Inspect seals and gaskets
- Check clutch pack wear
- Test shift solenoids
Use only GM-approved Dexron VI transmission fluid
- Comprehensive fluid flush
- Inspect torque converter
- Check transmission mounts
- Test electronic control module
- Verify shift performance
Special tools required for torque converter inspection
- Overhaul clutch packs
- Replace worn seals
- Inspect and clean oil passages
- Test transmission pressure
- Verify overall performance
Major service requires specialized equipment and expertise
Common Questions
Find answers to common questions about torque specifications
Q1 What are the technical specifications of the 8L45 transmission?
What are the technical specifications of the 8L45 transmission?
The 8L45 transmission is an 8-speed automatic gearbox designed for longitudinal engine layouts. It features a hydraulic torque converter, paddle-shift manual mode, and adaptive shift controls. Compatible with engines up to 3.6L V6, it offers smooth acceleration and fuel efficiency. Weight is approximately 185 lbs, with a fluid capacity of 9.5 quarts of synthetic ATF. It is used in the 2016-2020 Cadillac CT6, Chevrolet Camaro, and other GM vehicles.
Q2 What maintenance is required for the 8L45 transmission?
What maintenance is required for the 8L45 transmission?
Regular maintenance for the 8L45 includes fluid checks every 15,000 miles, pan gasket inspection, and filter replacement every 30,000 miles. Use only GM-approved synthetic ATF (Part #12378592). Avoid aggressive driving and extreme temperatures. Follow the recommended service schedule in your owner's manual to maintain warranty coverage and performance.
Q3 How do I install or replace the 8L45 transmission?
How do I install or replace the 8L45 transmission?
Installation requires a lift, transmission jack, and specialized tools. Drain the fluid, disconnect electrical connectors, and remove the crossmember. Remove the driveshaft, transmission cooler lines, and mounting bolts. Replace the transmission, ensuring proper alignment and torque specs. Refill with synthetic ATF, reconnect components, and test drive to ensure proper operation. Consult a certified technician for complex steps.
Q4 How do I troubleshoot common issues with the 8L45?
How do I troubleshoot common issues with the 8L45?
Check transmission fluid level and condition. Use a scan tool to diagnose fault codes (e.g., P0700, P0770). Inspect for leaks, worn clutch packs, or faulty solenoids. Test the cooler lines for blockages or damage. If slipping or hesitation occurs, consult a transmission specialist. Avoid driving in extreme conditions until issues are resolved.
Q5 How can I optimize the performance of the 8L45?
How can I optimize the performance of the 8L45?
Use the correct synthetic ATF and maintain proper fluid levels. Drive in manual mode for sporty performance. Avoid excessive heat buildup by ensuring proper cooling. Consider aftermarket transmission tuners for enhanced shift firmness and response. Regularly update the TCM software for improved performance and reliability.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Cadillac CT6 Transmission Service Manual
Coming SoonComprehensive guide for maintenance, repair, and troubleshooting of the 8L45 transmission in the Cadillac CT6.
Technical Bulletin: 8L45 Transmission Updates
Coming SoonOfficial updates and technical bulletins for the 8L45 transmission, including software updates and service procedures.
Genuine GM Parts Catalog for 8L45
Coming SoonCatalog of OEM parts and accessories for the 8L45 transmission, including filters, gaskets, and fluid.
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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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