GMC Yukon 2015-2020 6L80 Transmission Specifications
This document provides detailed specifications for the 6L80 transmission used in the 2015-2020 GMC Yukon. The 6L80 is a six-speed automatic transmission known for its durability and performance in heavy-duty applications. Specifications include gear ratios, torque capacity, fluid requirements, and shift patterns, which are essential for understanding the transmission's operation and maintenance. This information is valuable for owners, mechanics, and enthusiasts looking to optimize performance, diagnose issues, or perform upgrades. The document also covers compatibility with different engine configurations and provides insights into common troubleshooting tips and repair procedures.
Overview Specifications
This document provides detailed specifications and technical information about the 6L80 transmission used in the 2015-2020 GMC Yukon. It is designed to help users understand the key features, performance metrics, and maintenance requirements of this transmission. Whether you're a mechanic, enthusiast, or owner, this guide will assist you in finding the information you need quickly and efficiently.
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Navigate through the document by clicking on the section titles in the table of contents. Each section is organized into subsections for easy access to detailed information.
Key Specifications
Transmission Type
6-speed automatic
Maximum Torque
600 lb-ft
Fluid Type
Dexron VI
Weight
220 lbs
Service Interval
50,000 miles
Available Specifications
General Specifications
This section covers the basic technical specifications of the 6L80 transmission, including its design, construction, and compatibility with the GMC Yukon.
General Specifications
This section covers the basic technical specifications of the 6L80 transmission, including its design, construction, and compatibility with the GMC Yukon.
Design and Construction
- 6-speed automatic transmission
- Aluminum alloy case for reduced weight
- Electronically controlled with adaptive shift algorithms
- Integrated torque converter with lockup clutch
Compatibility
- Compatible with 2015-2020 GMC Yukon models
- Designed for use with V8 engines
- Supports both 2WD and 4WD configurations
- Adaptable to various driving conditions
Performance Metrics
This section details the performance characteristics of the 6L80 transmission, including its shift patterns, torque capacity, and fuel efficiency.
Performance Metrics
This section details the performance characteristics of the 6L80 transmission, including its shift patterns, torque capacity, and fuel efficiency.
Shift Patterns
- Smooth and precise gear shifts
- Adaptive shift scheduling based on driving conditions
- Manual shift mode available via paddle shifters
- Downshift rev matching for improved control
Torque Capacity
- Maximum torque capacity of 600 lb-ft
- Optimized for high-performance applications
- Handles heavy towing with ease
- Durable clutch materials for extended lifespan
Maintenance and Service
This section provides guidance on maintaining and servicing the 6L80 transmission, including fluid recommendations, service intervals, and common issues.
Maintenance and Service
This section provides guidance on maintaining and servicing the 6L80 transmission, including fluid recommendations, service intervals, and common issues.
Fluid Recommendations
- Use Dexron VI automatic transmission fluid
- Fluid change interval of 50,000 miles
- Check fluid level regularly for optimal performance
- Use only GM-approved fluids for best results
Common Issues
- Early signs of wear in the torque converter
- Potential for solenoid valve issues
- Regularly inspect for fluid leaks
- Ensure proper software updates for control module
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Transmission Specifications
Overview
- Type
- 6-speed automatic
- Configuration
- Rear-wheel drive/All-wheel drive
- Platform
- GM GMT K2XX
- Material
- Aluminum case with steel internals
- Location
- Longitudinally mounted
Dimensions
- Length
- 23.5 inches (597 mm)
- Width
- 17.3 inches (439 mm)
- Height
- 12.6 inches (320 mm)
- Weight
- 214 lbs (97 kg)
- input Shaft Length
- 9.8 inches (249 mm)
- Output Shaft Length
- 10.2 inches (259 mm)
- Fluid Capacity
- 11.2 quarts (10.6 liters)
Materials
- Case
- Aluminum alloy
- Gears
- Hardened steel
- Clutches
- Composite friction materials
- Shafts
- Forged steel
- Valve Body
- Aluminum with steel valves
Features
- Shift Technology
-
- Adaptive shift control
- Tap-up/tap-down manual shifting
- Grade braking
- Tow/Haul mode
- Efficiency
-
- Wide gear ratio spread
- Optimized torque converter
- Low spin losses
- Performance
-
- High torque capacity
- Quick shift response
- Smooth shift quality
- integration
-
- Electronic precision shift
- Integrated transmission control module
- Compatibility with multiple engine configurations
Safety Features
- Protection
-
- Overheat protection
- Slip detection
- Fail-safe mode
- Monitoring
-
- Real-time diagnostics
- Fluid level monitoring
Comfort Features
- Drive Modes
-
- Normal
- Tow/Haul
- Manual shift
- Shift Quality
-
- Smooth transitions
- Adaptive learning
- Noise Reduction
-
- Precision gear machining
- Optimized fluid flow
Accessories
- Cooling
-
- Transmission cooler
- Auxiliary cooler
- Upgrades
-
- Performance shift kits
- High-capacity torque converters
- Maintenance
-
- Filter kits
- Fluid change kits
- Seal kits
Maintenance
- Service interval
- Every 45,000 miles or 48 months
- Service Items
-
- Fluid and filter change
- Seal inspection
- Clutch pack check
- Shift solenoid test
- Torque converter inspection
- Maintenance Notes
- Use only Dexron VI transmission fluid
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain
- Miles: 60,000Years: 5Coverage: Transmission components
- Corrosion
- Miles: 100,000Years: 6Coverage: Perforation only
- Emissions
- Miles: 80,000Years: 8Coverage: Federal emissions components
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Robotic quality inspection
- Quality Control
- Dimensional Checks: 100%Pressure Testing: 100%Leak Testing: 100%
- Sustainability Practices
-
- Recycled aluminum usage
- Waste reduction programs
- Energy-efficient manufacturing
- Production Metrics
- Units Per Day: 1,200Defect Rate: 0.05%Lead Time: 5 days
Service Information for 6l80 transmission Service
Maintenance and service requirements specific to this component
- Transmission fluid and filter replacement
- Inspect for leaks
- Check shift quality
- Test electronic controls
- Inspect cooling lines
Use only Dexron VI transmission fluid
- Full fluid flush
- Inspect clutch packs
- Check torque converter
- Test shift solenoids
- Inspect seals and gaskets
Perform under controlled conditions
- Complete transmission overhaul
- Replace worn components
- Rebuild torque converter
- Test all electronic systems
- Verify shift performance
Requires specialized tools and equipment
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 6L80 transmission compatible with other GMC models or years?
Is the 6L80 transmission compatible with other GMC models or years?
The 6L80 transmission is primarily designed for the 2015-2020 GMC Yukon. While it shares similarities with other GM models like the Chevrolet Silverado and Tahoe, compatibility depends on specific configurations such as engine type, drivetrain, and software. Always consult your vehicle’s manual or a certified technician to ensure compatibility before making any modifications or replacements.
Q2 What are the maintenance requirements for the 6L80 transmission?
What are the maintenance requirements for the 6L80 transmission?
Regular maintenance for the 6L80 transmission includes fluid and filter changes every 45,000 to 60,000 miles, depending on driving conditions. Monitor for signs of fluid degradation, such as discoloration or burnt odor. Additionally, inspect for leaks, ensure proper fluid levels, and address any unusual noises or shifting issues promptly to prevent long-term damage.
Q3 How do I replace the 6L80 transmission in my GMC Yukon?
How do I replace the 6L80 transmission in my GMC Yukon?
Replacing the 6L80 transmission requires lifting the vehicle, disconnecting the battery, and removing the driveshaft, exhaust system, and transmission crossmember. Drain the transmission fluid, disconnect electrical connectors and shift linkage, and support the engine before removing the transmission. Install the new unit by reversing the steps, ensuring proper torque specifications and fluid levels. Professional assistance is recommended for precision.
Q4 What should I do if my 6L80 transmission is not shifting properly?
What should I do if my 6L80 transmission is not shifting properly?
If your 6L80 transmission is not shifting properly, start by checking the fluid level and condition. Low or degraded fluid can cause shifting issues. Inspect for error codes using a diagnostic scanner to identify potential electronic or mechanical problems. Common solutions include replacing the transmission filter, updating the control module software, or addressing worn internal components.
Q5 How can I optimize the performance of my 6L80 transmission?
How can I optimize the performance of my 6L80 transmission?
To optimize the 6L80 transmission’s performance, use high-quality transmission fluid and ensure regular maintenance. Consider reprogramming the transmission control module (TCM) for improved shift patterns and responsiveness. Avoid excessive towing or heavy loads without proper cooling upgrades. Installing an aftermarket cooler can enhance durability and performance under demanding conditions.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2015-2020 GMC Yukon 6L80 Transmission Service Manual
Coming SoonThis manual provides detailed instructions for servicing and repairing the 6L80 transmission, including disassembly, reassembly, and troubleshooting procedures.
Technical Service Bulletin: 6L80 Transmission Updates
Coming SoonThis bulletin outlines software updates and common issues for the 6L80 transmission, along with recommended solutions from GMC.
6L80 Transmission Parts and Accessories Catalog
Coming SoonThis catalog lists OEM and aftermarket parts for the 6L80 transmission, including filters, gaskets, and upgrade kits.
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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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