GMC Acadia 2017-2019 6T50 Transmission Transmission Torque Specifications & Bolt Torque Values
GMC Acadia 2017-2019

GMC Acadia 2017-2019 6T50 Transmission Torque Specifications

Detailed torque specifications for the 6T50 transmission bolts in the 2017-2019 GMC Acadia. Includes step-by-step instructions and critical tightening sequences.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

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.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

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.

Prevention:

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.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

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

Transmission Mounting

Bolts and components that secure the transmission to the vehicle chassis and engine block.

1

Transmission Mounting Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment of the transmission before tightening.
2

Transmission Bellhousing Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure a clean mating surface between the engine and transmission.

Oil Pan And Fluid Management

Components related to the transmission oil pan, drain/fill plugs, and fluid lines.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
8.8 ft-lbs (12 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Use a new sealing washer to prevent leaks.
3

Transmission Cooler Line Fittings

M12 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the fittings are properly aligned to avoid cross-threading.

Driveline Components

Bolts and nuts that secure the drive axles, CV joints, and propeller shaft to the transmission.

1

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Value
118 ft-lbs (160 N·m)
Important Notes
Ensure the axle is fully seated in the transmission before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Value
177 ft-lbs (240 N·m)
Important Notes
Use a new axle nut and stake it after tightening.
3

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Ensure the drive shaft is properly aligned with the transmission output flange.

Internal Transmission Components

Bolts and components inside the transmission, such as the valve body and torque converter.

1

Torque Converter Bolts

M8 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the torque converter is fully seated in the transmission before tightening.
2

Transmission Valve Body Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure the valve body is properly aligned with the transmission case.

Starter Motor

Bolts that secure the starter motor to the transmission housing.

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the starter motor is properly aligned with the transmission housing.

Shift Linkage

Bolts that secure the shift linkage to the transmission.

1

Transmission Shift Linkage Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the shift linkage is properly aligned with the transmission.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

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

1

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
2

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
3

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

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

What are the torque specifications for the 6T50 transmission pan bolts on a 2017-2019 GMC Acadia?

The torque specification for the 6T50 transmission pan bolts is 89 in-lbs (10 Nm). Ensure the pan surface and gasket are clean and properly aligned before tightening to avoid leaks.

Q2

How often should I check the torque on the 6T50 transmission bolts?

It is recommended to check the torque during routine maintenance or after any transmission service. For example, after replacing the transmission fluid or filter, recheck the torque to ensure proper sealing and component integrity.

Q3

Can over-tightening the transmission bolts cause damage?

Yes, over-tightening can strip threads, warp the transmission pan, or damage the gasket, leading to leaks. Always use a calibrated torque wrench and follow the manufacturer's specifications.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

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

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

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 precision tool used to apply a specific torque to bolts and nuts.

  • Adjustable torque settings
  • Calibration certificate included
Learn more

Socket Set

A set of sockets compatible with transmission bolts.

  • Metric sizes
  • Durable chrome vanadium construction
Learn more

Thread Locker

A chemical compound used to secure bolts and prevent loosening.

  • High-strength formula
  • Temperature resistant
Learn more
Service Procedures

6T50 Transmission Bolt Torque Specifications

Detailed steps to properly torque the bolts on the 6T50 transmission.

  • Ensure the vehicle is on a flat surface and the transmission is cool.
  • Remove the transmission pan and drain the fluid if necessary.
  • Identify the specific bolts requiring torque application (e.g., pan bolts, valve body bolts).
  • Use a torque wrench to apply the specified torque values: Pan bolts - 10 Nm (89 lb-in), Valve body bolts - 12 Nm (106 lb-in).
  • Reinstall the transmission pan and refill with the appropriate transmission fluid.
  • Test the vehicle to ensure proper operation.
View full procedure
Technical Service Bulletins

6T50 Transmission Bolt Loosening Issue

2018-05-15

Reports of transmission bolts loosening over time, leading to fluid leaks and performance issues.

2017-2019 GMC Acadia

Resolution: Apply thread locker to the specified bolts and ensure proper torque during reassembly.

6T50 Transmission Fluid Leak TSB

2019-03-22

Technical service bulletin addressing fluid leaks caused by improperly torqued transmission bolts.

2017-2019 GMC Acadia

Resolution: Inspect and retorque all transmission bolts to the manufacturer's specifications. Replace any damaged seals or gaskets.

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

Facebook Contact
15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
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.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

© 2025 GMC Specs. All rights reserved.

Privacy Policy Terms of Service