GMC Terrain 2010-2017 Drivetrain Bolt Torque Specifications
Comprehensive torque specifications for drivetrain bolts on the 2010-2017 GMC Terrain. Includes engine mounts, transmission mounts, driveshaft bolts, and other relevant components. Essential for DIY repairs and professional maintenance.
Important Information
Safety guidelines and reference information for proper torque application
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
Quick Reference Guide
Common Torque Patterns
Star Pattern
Used for wheels and other circular bolt patterns
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
Common Mistakes to Avoid
Over-tightening
Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.
Always use a calibrated torque wrench and follow specifications exactly.
Incorrect Torque Sequence
Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
Clean and inspect all threads before assembly. Use new thread locker if specified.
Reusing TTY Bolts
Torque-to-yield bolts are designed to stretch and must not be reused.
Always replace TTY bolts with new ones. They are single-use only.
Dry vs. Lubricated
Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Torque Wrench (3/8" Drive)
Torque Wrench (1/2" Drive)
Angle Gauge
Torque Wrench Care
- Calibrate annually or after 5,000 clicks
- Store at lowest setting
- Keep clean and lubricated
Search Specifications
Search by component name, bolt size, or description
Torque Calculator
Convert between different torque units
Engine
The engine is the heart of the vehicle, and proper torque ensures the flywheel is properly seated and the engine's rotational energy is transferred to the transmission.
1 Flywheel Bolts
M12 x 1.5
Flywheel Bolts
M12 x 1.5Torque Value
Transmission
The transmission is responsible for transferring the engine's rotational energy to the wheels, and proper torque ensures the transmission is properly aligned and supported.
1 Transmission Mounting Bolts
M10 x 1.25
Transmission Mounting Bolts
M10 x 1.25Torque Value
2 Transmission Oil Pan Bolts
M8 x 1.25
Transmission Oil Pan Bolts
M8 x 1.25Torque Value
Important Notes
3 Transmission Crossmember Bolts
M14 x 1.5
Transmission Crossmember Bolts
M14 x 1.5Torque Value
Important Notes
Drivetrain
The drivetrain is responsible for transferring the transmission's rotational energy to the wheels, and proper torque ensures the drivetrain components are properly seated and secured.
1 Drive Axle/Half Shaft Bolts
M14 x 1.5
Drive Axle/Half Shaft Bolts
M14 x 1.5Torque Value
2 CV Joint/Axle Nut
M18 x 1.5
CV Joint/Axle Nut
M18 x 1.5Torque Value
3 Propeller/Drive Shaft Bolts
M14 x 1.5
Propeller/Drive Shaft Bolts
M14 x 1.5Torque Value
4 Drive Axle/Half Shaft Nut (at the wheel hub)
M18 x 1.5
Drive Axle/Half Shaft Nut (at the wheel hub)
M18 x 1.5Torque Value
Important Notes
Differential
The differential is responsible for transferring the drivetrain's rotational energy to the wheels, and proper torque ensures the differential components are properly seated and secured.
1 Differential Drain/Fill Plug
M12 x 1.5
Differential Drain/Fill Plug
M12 x 1.5Torque Value
2 Differential Cover Bolts
M10 x 1.25
Differential Cover Bolts
M10 x 1.25Torque Value
Important Notes
Transfer Case
The transfer case is responsible for transferring the drivetrain's rotational energy to the wheels, and proper torque ensures the transfer case components are properly seated and secured.
1 Transfer Case Drain/Fill Plug
M12 x 1.5
Transfer Case Drain/Fill Plug
M12 x 1.5Torque Value
2 Transfer Case Mounting Bolts
M12 x 1.5
Transfer Case Mounting Bolts
M12 x 1.5Torque Value
Important Notes
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Loose Components
Symptoms:
- Rattling or vibration noises
- Visible movement in components
- Uneven panel gaps
Solutions:
- Clean threads and mounting surfaces
- Replace damaged fasteners
- Apply proper torque in sequence
- Use thread locker if specified
Stripped Fasteners
Symptoms:
- Unable to achieve proper torque
- Fastener spins freely
- Visible thread damage
Solutions:
- Use thread repair kit if appropriate
- Install thread insert (HeliCoil)
- Replace component if threaded hole is damaged
- Upgrade to higher grade fastener if recommended
Overtightened Components
Symptoms:
- Cracked or deformed parts
- Broken fasteners
- Compressed gaskets or seals
Solutions:
- Replace damaged components
- Use new fasteners
- Follow proper torque sequence
- Verify correct torque specifications
Diagnostic Steps
Visual inspection, torque verification, thread assessment
Diagnostic Steps
Visual inspection, torque verification, thread assessment
Visual Inspection
Inspect the affected area for any visible signs of damage or wear
- Check for cracks or deformation
- Look for signs of excessive wear
- Verify proper fastener installation
Torque Verification
Verify the torque applied to the fasteners
- Check the torque wrench calibration
- Verify the torque specification
- Compare the applied torque to the specification
Thread Assessment
Assess the condition of the threads
- Check for signs of thread damage
- Verify the thread type and size
- Check for proper thread engagement
Prevention Guidelines
Best practices, maintenance tips, tool care
Prevention Guidelines
Best practices, maintenance tips, tool care
Best Practices
- Always follow the recommended torque specification
- Use the correct type and size of fasteners
- Verify the torque wrench calibration regularly
Maintenance Tips
- Regularly inspect the affected area for signs of wear or damage
- Replace damaged or worn-out components promptly
- Keep the work area clean and organized
Tool Care
- Regularly clean and maintain the torque wrench
- Store the torque wrench in a dry and secure location
- Verify the torque wrench calibration before each use
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 Why are torque specifications important for drivetrain components?
Why are torque specifications important for drivetrain components?
Proper torque is crucial for maintaining the integrity of the drivetrain. Insufficient torque can lead to loose connections, potentially causing vibrations and failure under stress, like during acceleration or towing. Over-torquing can damage threads, weaken components, and in extreme cases, break parts, leading to costly repairs and even safety hazards. Imagine a loose axle bolt – it could cause a catastrophic failure while driving, leading to an accident.
Q2 What if I don't have the correct torque wrench?
What if I don't have the correct torque wrench?
Using a torque wrench that's calibrated and appropriate for the size and type of bolt is essential. Using a wrench that's too small or too large can result in insufficient or excessive torque. A digital torque wrench is recommended for accuracy. If you don't have the correct wrench, consult a qualified mechanic.
Q3 How often should I check drivetrain bolt torque?
How often should I check drivetrain bolt torque?
Regular checks are essential, especially after significant driving, towing, or maintenance. A good rule of thumb is to check all critical drivetrain bolts, like axle nuts, transmission mounts, and driveshaft bolts, at least every 10,000 miles. Frequent towing might necessitate more frequent checks.
Q4 What tools are needed for checking and adjusting drivetrain torque?
What tools are needed for checking and adjusting drivetrain torque?
A calibrated torque wrench that matches the specifications is mandatory. You'll also need appropriate sockets, extensions, and possibly impact wrenches (for certain applications). Proper safety glasses and gloves are also crucial for protection.
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature can significantly impact torque values and fastener behavior
Cold Weather
Effects:
- Increased material brittleness
- Higher torque required due to thread contraction
- Reduced thread lubricant effectiveness
Recommendations:
- Allow components to warm to room temperature when possible
- Consider using winter-grade thread lubricants
- Check torque values more frequently during winter months
Hot Weather
Effects:
- Thermal expansion of components
- Decreased friction in threads
- Accelerated lubricant breakdown
Recommendations:
- Check torque when components are at normal operating temperature
- Use temperature-resistant thread lockers
- Consider re-torquing after heat cycles
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Moisture and corrosion can affect fastener integrity and torque values
High Humidity
Effects:
- Accelerated corrosion formation
- Reduced friction coefficient
- Potential thread seizing
Prevention:
- Use corrosion-resistant fasteners
- Apply appropriate anti-seize compounds
- Maintain proper protective coatings
Salt Exposure
Effects:
- Rapid corrosion development
- Thread damage
- Seized fasteners
Prevention:
- Regular underbody washing
- Use of sacrificial anodes where appropriate
- Application of protective coatings
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Spring
- Inspect for winter damage
- Clean and protect exposed fasteners
- Check torque on critical components
Summer
- Monitor heat-affected components
- Check expansion-related loosening
- Inspect cooling system mounts
Fall
- Prepare for winter conditions
- Apply corrosion protection
- Verify all fasteners are properly torqued
Winter
- More frequent inspection of critical fasteners
- Check for salt damage
- Monitor suspension component torque
Related Resources
Tools, service procedures, and technical bulletins
Recommended Tools
Torque Wrench
A calibrated torque wrench is essential for accurate torque application.
- Accurate torque readings
- Various torque settings
- Durability for automotive use
Sockets and Extensions
Appropriate size sockets and extensions for access to various bolt locations.
- Multiple sizes for different bolts
- Various extensions for tight spaces
- Durable construction for repeated use
Impact Wrench (Optional)
For quicker tightening of bolts, but use caution to avoid over-torquing.
- High torque output
- Fast tightening speed
- Potential for over-torquing if not properly used
Gloves
Protect hands from grease, dirt, and potential hazards during the procedure.
- Slip-resistant grip
- Protection from contaminants
Service Procedures
Drivetrain Bolt Torque Sequence (2010-2017 GMC Terrain)
Proper sequence for tightening drivetrain bolts to prevent damage and ensure optimal performance.
- Ensure the vehicle is securely supported on jack stands.
- Refer to the specific torque specifications for each bolt location in the repair manual.
- Tighten all bolts in a star pattern, progressing from the center outwards.
- Repeat tightening in the same pattern to ensure even tension.
- Verify torque using a calibrated torque wrench.
- Consult the repair manual for additional details and diagrams.
Transmission Mount Bolt Torque Procedure
Specific procedure for tightening transmission mount bolts.
- Locate and identify the transmission mount bolts.
- Using a torque wrench, tighten each bolt to the specified torque value in a star pattern, working from the center outwards.
- Verify the torque of each bolt with a calibrated torque wrench.
- Double-check that the transmission mount is properly aligned.
- Lower the vehicle and test for any unusual noises or vibrations.
Technical Service Bulletins
Possible Transmission Mount Bolt Failure
2016-03-15Addresses potential issues with transmission mount bolts, leading to vibrations and noises.
Resolution: Ensure correct torque application for transmission mount bolts per the repair manual. Inspect for any damage to the mount itself.
Improper Torque Application in Drive Shaft Assembly
2014-10-27Highlights the importance of adhering to the recommended torque specifications for drivetrain components.
Resolution: Use a calibrated torque wrench to ensure correct torque application. Consult the repair manual for torque specifications.
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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.