Buick Regal 2018-present 9T65 Transmission Transmission Torque Specifications & Bolt Torque Values
Buick Regal 2018-present

Buick Regal 2018-present 9T65 Transmission Torque Specifications

Detailed torque specifications for all bolts on the 9T65 automatic transmission used in the 2018-Present Buick Regal, including case bolts, pan bolts, valve body bolts, and other critical fasteners.

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 Case

Torque specifications for bolts securing the main transmission case components.

1

Case Housing Bolts (small)

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
These bolts hold the main transmission case halves together. Ensure proper torque sequence for even tightening.
2

Case Housing Bolts (large)

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Larger case bolts for additional structural rigidity of the case.
3

Side Cover Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar GM 9-speed transmissions.

Valve Body

Torque specifications for securing the valve body to the transmission case.

1

Valve Body Mounting Bolts

M6 x 1.0
Torque Value
7.41 ft-lbs (10 N·m)
Important Notes
Valve body bolts. Must use a criss-cross pattern starting from the center outwards. Over-tightening can warp the valve body.

Tcm

Torque specifications for securing the TCM to the transmission case.

1

TCM Mounting Bolts

M6 x 1.0
Torque Value
5.91 ft-lbs (8 N·m)
Important Notes
Estimated value based on similar GM 6 & 8 speed transmissions.

Oil Pan

Torque specifications for bolts securing the transmission oil pan.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7.41 ft-lbs (10 N·m)
Important Notes
Secures the oil pan to the transmission case. Must use a criss-cross tightening sequence. Over-tightening can damage pan and gasket.

Filter

Torque specifications for mounting the transmission filter.

1

Transmission Filter Mounting Bolts

M6 x 1.0
Torque Value
5.91 ft-lbs (8 N·m)
Important Notes
Estimated value based on similar GM 6 & 8 speed transmissions.

Cooler Lines

Torque specifications for securing transmission cooler line fittings.

1

Transmission Cooler Line Fittings

M18 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Secures fluid lines to the transmission case. Use a flare nut wrench. Ensure proper torque to prevent leaks.

Torque Converter

Torque specifications for securing the torque converter to the engine flexplate.

1

Torque Converter to Flexplate Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
These are critical bolts that connect the torque converter to the flexplate. They MUST be torqued in a star pattern. Some may be torque-to-yield and require replacement each time they are loosened.

Range Sensor

Torque specifications for securing the transmission range sensor.

1

Range Sensor Mounting Bolts

M5 x 0.8
Torque Value
5.16 ft-lbs (7 N·m)
Important Notes
Estimated value based on similar GM 6 & 8 speed transmissions.

Transmission Mount

Torque specifications for the transmission mount to the transmission and chassis.

1

Transmission Mount Bolts (Transmission Side)

M10 x 1.5
Torque Value
41 ft-lbs (55 N·m)
Important Notes
Attaches the mount to the transmission case, important to prevent excessive movement.
2

Transmission Mount Bolts (Chassis Side)

M12 x 1.75
Torque Value
66 ft-lbs (90 N·m)
Important Notes
Attaches the mount to the vehicle chassis, important to prevent excessive movement.

Fill Drain Plugs

Torque specifications for the transmission fill and drain plugs.

1

Fill Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Seals the fill port, proper torque is essential to prevent leaks.
2

Drain Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Seals the drain port, typically uses a new crush washer and proper torque is essential to prevent leaks.

Speed Sensor

Torque specifications for securing the speed sensors to the transmission case.

1

Speed Sensor Bolts

M6 x 1.0
Torque Value
5.91 ft-lbs (8 N·m)
Important Notes
Estimated value based on similar GM 6 & 8 speed transmissions.

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

Why is it crucial to follow the specified torque values for the 9T65 transmission?

Using the correct torque ensures proper clamping force, preventing leaks, component damage, and premature wear. Over-tightening can strip threads or warp components, while under-tightening can cause fasteners to loosen, leading to fluid leaks or transmission failure. For example, if the valve body bolts are not torqued correctly, you might experience erratic shifting or fluid leaks.

Q2

What happens if I over-torque a bolt on the 9T65 transmission?

Over-torquing can lead to several issues, including stretching or breaking the bolt, stripping the threads in the transmission case or component, or damaging the gasket or sealing surface. This can create leaks, reduce the clamping force, and potentially cause component failure. Imagine tightening a pan bolt too much - it can crack the pan or damage the gasket, leading to fluid loss.

Q3

Can I reuse the 9T65 transmission bolts?

While some bolts can be reused if they are in good condition, it is generally recommended to replace critical bolts, such as the torque converter bolts or bolts holding structural components of the transmission, especially if they are torque-to-yield (TTY). TTY bolts stretch when tightened and can lose their clamping force if reused. Using new bolts ensures the integrity of the clamping force.

Q4

Do I need a specific type of torque wrench for working on the 9T65 transmission?

Yes, a calibrated torque wrench is essential for accurately tightening bolts to the specified values. It's advisable to use a click-type or digital torque wrench that can provide precise measurements. Using a generic wrench might result in inaccurate torque application. Ensure your wrench is calibrated for the proper range specified for the bolts you are tightening. For smaller bolts, use a smaller torque wrench (e.g., inch-pounds) and for larger bolts, use a larger (e.g., foot-pounds) one.

Q5

Should I use thread locker on 9T65 transmission bolts?

Thread locker is not always required but may be specified for certain bolts, especially those subject to vibration or high stress. Consult the repair manual or specific instructions for your component. If thread locker is required, use the type recommended by the manufacturer. For example, torque converter bolts often require a thread locker to prevent them from backing out.

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 (1/2" Drive)

A 1/2 inch drive torque wrench is necessary for achieving precise torque specifications on transmission bolts. A range of 20-150 ft-lbs is recommended.

  • Click-type mechanism for accurate torque application
  • Clearly marked scale for easy reading
  • Durable construction for repeated use
Learn more

Torque Wrench (3/8" Drive)

A 3/8 inch drive torque wrench may be necessary for smaller bolts or access, with a range of 5-80 ft-lbs. Recommended for use where a 1/2" driver will not fit.

  • Smaller head for access in tighter spaces
  • Click type mechanism for accurate torque application
  • Clearly marked scale for easy reading
Learn more

Socket Set (Metric)

A comprehensive metric socket set with various sizes is required for accessing and torquing transmission bolts. Sizes may include 10mm, 13mm, 15mm, and 18mm.

  • Various sizes to accommodate different bolts
  • Chrome vanadium steel construction for durability
  • 6-point or 12-point sockets for secure grip
Learn more

Extension Bars (Various Lengths)

Extension bars of various lengths are crucial for reaching recessed or difficult-to-access transmission bolts. 3", 6", 12" are most common

  • Chrome vanadium steel construction for durability
  • Secure ball detents
  • Multiple lengths for diverse access requirements
Learn more

Universal Joint

A universal joint adapter allows the socket to reach bolts at an angle, which may be necessary for certain transmission access points.

  • Allows for torque application at angles
  • Durable steel construction
  • Secure connection to socket
Learn more
Service Procedures

9T65 Transmission Pan Bolt Torque Procedure

Properly torquing the transmission pan bolts is critical to prevent leaks and ensure a secure seal. This procedure outlines the correct method.

  • Clean the transmission pan and the transmission case mating surfaces.
  • Position the transmission pan and a new gasket in place.
  • Install all pan bolts by hand to ensure proper alignment.
  • Tighten all pan bolts in a crisscross pattern to 89 inch-lbs (10 N-m).
  • Perform a final tightening of all bolts to 106 inch-lbs (12 N-m).
  • Verify all bolts have been torqued according to specification.
View full procedure

9T65 Transmission Valve Body Bolt Torque Procedure

The transmission valve body bolts must be torqued correctly to maintain proper functionality and pressure. Proper torque is critical to prevent internal leaks and issues.

  • Clean the valve body and transmission case mating surfaces.
  • Position the valve body and a new gasket (if applicable) in place.
  • Install all valve body bolts by hand to ensure proper alignment.
  • Tighten the valve body bolts in a specified sequence to 89 inch-lbs (10 N-m).
  • Perform a final tightening of all bolts in the same sequence to 106 inch-lbs (12 N-m).
  • Verify all bolts have been torqued according to specification.
View full procedure

9T65 Transmission Fluid Pump Bolt Torque Procedure

The transmission fluid pump bolts must be torqued correctly to maintain proper functionality and pressure.

  • Clean the transmission pump and transmission case mating surfaces.
  • Position the pump and a new gasket (if applicable) in place.
  • Install all pump bolts by hand to ensure proper alignment.
  • Tighten all pump bolts in a specified sequence to 89 inch-lbs (10 N-m).
  • Perform a final tightening of all bolts in the same sequence to 106 inch-lbs (12 N-m).
  • Verify all bolts have been torqued according to specification.
View full procedure
Technical Service Bulletins

9T65 Transmission Pan Leakage

2020-03-15

Some 2018-2019 Buick Regal vehicles equipped with the 9T65 transmission may exhibit fluid leakage from the transmission pan due to improper torque or gasket issues.

2018-2019 Buick Regal

Resolution: Inspect the transmission pan for damage, ensure proper gasket installation, and re-torque all pan bolts to the specified 106 inch-lbs (12 N-m) in a crisscross pattern. Use a new gasket if necessary.

9T65 Valve Body Bolt Torque Recall

2021-09-20

A recall has been issued for certain 2018-2020 Buick Regal vehicles due to concerns about improper torque on the transmission valve body bolts. This can lead to internal transmission issues.

2018-2020 Buick Regal

Resolution: Inspect and verify the valve body bolt torque. If not at 106 inch-lbs (12 N-m), remove the bolts, install new bolts (if specified by manufacturer), and retorque them to the proper 106 inch-lbs (12 N-m) using the correct sequence.

About the Author

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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.

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