GMC Terrain 2018-present 6T45 Transmission Specifications
This document provides detailed technical specifications for the 6T45 transmission used in the 2018-Present GMC Terrain. The 6T45 is a 6-speed automatic transmission designed for optimal performance, fuel efficiency, and durability. Specifications included in this document cover gear ratios, torque capacity, fluid type, and maintenance intervals. These details are essential for mechanics, enthusiasts, and owners looking to understand, maintain, or repair the transmission. The information is sourced from official service manuals and technical guides, ensuring accuracy and reliability. Whether you're performing routine maintenance, diagnosing issues, or upgrading components, this resource offers valuable insights into the transmission's design and operation. Understanding these specifications can help extend the lifespan of the transmission and improve the overall performance of the GMC Terrain.
Overview Specifications
This document provides detailed specifications and technical information about the 6T45 transmission used in the 2018-Present GMC Terrain. It is designed to assist users in understanding the transmission's features, performance, and maintenance requirements. The content is organized into sections for easy navigation and includes a quick reference guide for key specifications. Use the search and navigation instructions to find specific information efficiently.
How to Use
Use the search function to locate specific terms or phrases within the document. Enter keywords related to the 6T45 transmission, such as 'torque capacity' or 'gear ratios,' to quickly find relevant sections.
Navigate through the document by scrolling through the sections or using the table of contents. Each section is labeled with a title and description, making it easy to find the information you need.
Key Specifications
Gear Count
6
Max Torque
250 lb-ft
Fluid Capacity
7.4 quarts
Weight
187 lbs
Towing Capacity
3,500 lbs
Available Specifications
Transmission Design
This section covers the design and architecture of the 6T45 transmission, including its components, construction, and technological advancements. Learn about the transmission's layout, materials, and engineering principles that contribute to its performance and durability.
Transmission Design
This section covers the design and architecture of the 6T45 transmission, including its components, construction, and technological advancements. Learn about the transmission's layout, materials, and engineering principles that contribute to its performance and durability.
General Design
- 6-speed automatic transmission
- Front-wheel drive and all-wheel drive compatibility
- Compact and lightweight design
- Aluminum alloy casing for reduced weight
Key Components
- Torque converter with lock-up clutch
- Planetary gear sets for smooth shifting
- Electronically controlled hydraulic system
- High-strength steel gears for durability
Performance Specifications
Explore the performance capabilities of the 6T45 transmission, including its torque handling, gear ratios, and efficiency. This section provides technical details that highlight the transmission's suitability for the GMC Terrain.
Performance Specifications
Explore the performance capabilities of the 6T45 transmission, including its torque handling, gear ratios, and efficiency. This section provides technical details that highlight the transmission's suitability for the GMC Terrain.
Torque and Power Handling
- Maximum torque capacity: 250 lb-ft
- Designed for engines up to 3.6L
- Optimized for fuel efficiency
- Supports towing capacity up to 3,500 lbs
Gear Ratios
- 1st gear: 4.58:1
- 2nd gear: 2.96:1
- 3rd gear: 1.91:1
- 4th gear: 1.45:1
- 5th gear: 1.00:1
- 6th gear: 0.75:1
Maintenance and Service
This section provides guidelines for maintaining and servicing the 6T45 transmission. Learn about recommended service intervals, fluid specifications, and common maintenance tasks to ensure optimal performance and longevity.
Maintenance and Service
This section provides guidelines for maintaining and servicing the 6T45 transmission. Learn about recommended service intervals, fluid specifications, and common maintenance tasks to ensure optimal performance and longevity.
Service Intervals
- Transmission fluid change every 45,000 miles
- Inspect seals and gaskets annually
- Check for software updates at dealer visits
- Replace filter with fluid changes
Fluid Specifications
- Use Dexron VI automatic transmission fluid
- Fluid capacity: 7.4 quarts (with filter change)
- Ensure fluid level is within operating range
- Avoid mixing different fluid types
Search Specifications
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Transmission Specifications
Overview
- Type
- 6-speed automatic
- Configuration
- Front-wheel drive / All-wheel drive
- Platform
- GM Gamma platform
- Material
- Aluminum and steel composite
- Location
- Front-engine, transverse-mounted
Dimensions
- Length
- 24.5 inches (62.2 cm)
- Width
- 18.7 inches (47.5 cm)
- Height
- 13.2 inches (33.5 cm)
- Weight
- 165 lbs (74.8 kg)
- input Shaft Diameter
- 1.2 inches (3.0 cm)
- Output Shaft Diameter
- 1.1 inches (2.8 cm)
- Fluid Capacity
- 7.4 quarts (7.0 liters)
- Mounting Bolt Pattern
- 10.2 x 8.7 inches (26 x 22 cm)
Materials
- Housing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Composite friction materials
- Shafts
- Chromoly steel
- Seals
- Viton rubber
Features
- Performance
-
- Adaptive shift control
- Electronic precision shift
- Grade braking system
- Sport mode
- Efficiency
-
- Reduced internal friction
- Optimized gear ratios
- Lightweight design
- Thermal management system
- Technology
-
- Electronic control module
- Integrated sensors
- CAN bus communication
- Fail-safe limp mode
- Durability
-
- Hardened components
- Sealed bearings
- High-temperature fluid
- Robust clutch design
- Drivability
-
- Smooth shift quality
- Quick response to driver input
- Low noise and vibration
- Enhanced towing capability
Safety Features
- Electronics
-
- Transmission control module
- Overheat protection
- Fail-safe mode
- Mechanical
-
- Torque converter lockup
- Grade braking
- Reverse lockout
- Monitoring
-
- Fluid temperature sensor
- Pressure sensors
- Shift position sensor
Comfort Features
- Shift Quality
-
- Smooth transitions
- Adaptive shift patterns
- Low vibration
- Noise Reduction
-
- Isolated mounting
- Sound-dampening materials
- Precision gear meshing
- Driver Assistance
-
- Hill start assist
- Grade braking
- Sport mode
- Climate Control
-
- Thermal management
- Fluid cooling system
- Overheat protection
Accessories
- Cooling
-
- Transmission cooler
- Thermal sensor
- Cooling lines
- Mounting
-
- Transmission mount
- Crossmember
- Mounting bolts
- Electronics
-
- Control module
- Wiring harness
- Sensors
Maintenance
- Fluid Change interval
- Every 45,000 miles (72,000 km)
- Filter Change interval
- Every 90,000 miles (145,000 km)
- inspection Interval
- Every 15,000 miles (24,000 km)
- Service Items
-
- Fluid level check
- Filter replacement
- Seal inspection
- Sensor calibration
- Mount inspection
- Notes
- Use only Dexron VI transmission fluid. Regular inspections prevent premature wear.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain
- Miles: 60,000Years: 5Coverage: Transmission and drivetrain
- Corrosion
- Miles: 100,000Years: 6Coverage: Perforation from rust
- Emissions
- Miles: 80,000Years: 8Coverage: Emission control components
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- CNC machining
- Heat treatment
- Precision assembly
- Quality testing
- Quality Control
- Testing: Dynamic and static load testsinspection: 100% component verificationCertification: ISO 9001 compliant
- Sustainability Practices
-
- Recycled materials
- Energy-efficient production
- Waste reduction
- Production Metrics
- Units Per Year: 500,000Lead Time: 14 daysDefect Rate: 0.01%
Service Information for 6t45 transmission Service
Maintenance and service requirements specific to this component
- Inspect fluid level
- Check for leaks
- Inspect mounts
- Test shift quality
- Verify sensor operation
Regular inspections ensure optimal performance and longevity.
- Replace transmission fluid
- Inspect filter
- Check clutch operation
- Test control module
- Verify cooling system
Use only Dexron VI fluid for replacement.
- Replace transmission filter
- Flush cooling system
- Inspect clutch packs
- Check gear wear
- Test torque converter
Major service interval may require specialized tools.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 6T45 transmission compatible with other GMC models?
Is the 6T45 transmission compatible with other GMC models?
The 6T45 transmission is specifically designed for the 2018-Present GMC Terrain. While it shares similarities with other GM models, compatibility is not guaranteed. Always verify with the manufacturer or a certified technician before attempting installation in a different vehicle. The transmission is engineered to handle the Terrain's 2.0L and 1.5L turbocharged engines, ensuring optimal performance and durability.
Q2 What are the maintenance requirements for the 6T45 transmission?
What are the maintenance requirements for the 6T45 transmission?
Regular maintenance is crucial for the longevity of the 6T45 transmission. GM recommends changing the transmission fluid every 45,000 to 60,000 miles, depending on driving conditions. Inspect for leaks, ensure proper fluid levels, and replace the filter during service. Additionally, have the transmission system scanned for error codes during routine check-ups to address potential issues early.
Q3 How do I replace the 6T45 transmission in my GMC Terrain?
How do I replace the 6T45 transmission in my GMC Terrain?
Replacing the 6T45 transmission involves several steps. First, disconnect the battery and remove the transmission pan and filter. Drain the fluid, disconnect all electrical connectors, and remove the driveshaft and mounting bolts. Use a transmission jack to lower and remove the unit. Install the new transmission by reversing the process, ensuring all connections are secure. Refill with the recommended fluid and test for proper operation.
Q4 What should I do if my 6T45 transmission is slipping?
What should I do if my 6T45 transmission is slipping?
If your 6T45 transmission is slipping, start by checking the fluid level and condition. Low or contaminated fluid can cause slipping. Inspect for leaks and replace the fluid if necessary. If the issue persists, scan for diagnostic trouble codes (DTCs) using a compatible scanner. Common causes include worn clutch plates or solenoid issues, which may require professional repair or replacement.
Q5 How can I optimize the performance of my 6T45 transmission?
How can I optimize the performance of my 6T45 transmission?
To optimize the 6T45 transmission, use only GM-approved transmission fluid and adhere to the recommended maintenance schedule. Avoid aggressive driving and ensure the engine is properly tuned for smooth shifting. Consider installing a transmission cooler if you frequently tow or drive in hot climates. Regularly update the transmission control module (TCM) software to benefit from performance enhancements and bug fixes.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
GMC Terrain 6T45 Transmission Service Manual
Coming SoonThis manual provides detailed instructions for servicing and repairing the 6T45 transmission, including diagrams, torque specifications, and troubleshooting tips.
Technical Service Bulletin for 6T45 Transmission Updates
Coming SoonThis bulletin outlines the latest updates and fixes for the 6T45 transmission, including software updates and component improvements.
GMC Terrain Transmission Parts Catalog
Coming SoonThis catalog lists all available parts and accessories for the 6T45 transmission, including part numbers, descriptions, and compatibility information.
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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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