Acura TLX 2015-2020 8DCT Transmission Transmission Torque Specifications & Bolt Torque Values
Acura TLX 2015-2020

Acura TLX 2015-2020 8DCT Transmission Torque Specifications

Detailed torque specifications for all bolts associated with the 8-speed dual-clutch transmission (8DCT) used in the 2015-2020 Acura TLX. Includes torque values for various transmission components and 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

8dct Transmission Mounting

Torque specifications for mounting the 8-speed dual-clutch transmission to the engine and chassis.

1

Transmission Mounting Bolts

M12 x 1.75
Torque Value
47 ft-lbs (64 N·m)
Important Notes
These bolts secure the transmission housing to the engine block and/or chassis. Ensure proper alignment before tightening.
2

Transmission Bell Housing Bolts

M10 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
These bolts secure the bell housing to the engine block. Value is an estimate. Use a criss-cross pattern to ensure even tightening.

8dct Transmission Case

Torque specifications for the transmission case and related components.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
6 ft-lbs (8 N·m)
Important Notes
These bolts secure the transmission oil pan to the transmission case. Use a cross tightening sequence to prevent leaks. This is 71 in-lbs converted to ft-lbs and rounded
2

Transmission Drain Plug

M18 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Ensure drain plug is properly sealed with a new crush washer or o-ring before torquing. If no washer is visible, inspect carefully for a recessed o-ring and replace if necessary.
3

Transmission Fill Plug

M18 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Ensure fill plug is properly sealed with a new crush washer or o-ring before torquing. If no washer is visible, inspect carefully for a recessed o-ring and replace if necessary.

8dct Mechatronics Clutch Actuation

Torque specifications for the mechatronics unit and clutch actuator components.

1

Mechatronics Unit Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
These bolts secure the mechatronics unit to the transmission housing. Torque value is an estimate. Over-tightening can damage the unit.
2

Clutch Actuator Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
These bolts secure the clutch actuator components to the transmission housing. Torque value is an estimate. Over-tightening can damage the unit.

8dct Driveline

Torque specifications for the driveline components connected to the 8DCT.

1

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Value
47 ft-lbs (64 N·m)
Important Notes
These bolts secure the drive axles to the transmission output flanges. Ensure proper alignment before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Value
177 ft-lbs (240 N·m)
Important Notes
This nut secures the axle to the wheel hub. Proper torque is essential for wheel bearing and cv joint life. Always use a new nut if called for by the service manual.

8dct Cooling

Torque specifications for the transmission cooler line fittings.

1

Transmission Cooler Line Fittings

Varies by fitting type - Example: M16 x 1.5 for banjo
Torque Value
18 ft-lbs (24 N·m)
Important Notes
This torque is an estimate and may vary depending on the fitting type. Ensure fitting is correctly seated before tightening. Always use new sealing washers where required.

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 using the correct torque specification important for the 8DCT transmission?

Using the correct torque specification ensures proper clamping force on components, preventing leaks, loosening, and damage. Under-torquing can lead to fluid leaks or bolts backing out, potentially causing catastrophic transmission failure. Over-torquing can damage threads, deform components, or weaken fasteners, also resulting in failure. It's especially critical on the 8DCT due to its precision design.

Q2

What type of lubricant or anti-seize should be used on the 8DCT transmission bolts?

Generally, clean threads are sufficient for most transmission fasteners. However, if a specific lubricant is called out in the service manual (e.g., for a bolt going into aluminum), use only the manufacturer-recommended lubricant. Never use generic anti-seize compounds unless explicitly stated, as they can alter torque values. For bolts that go into fluid-filled areas, ensure the lubricant or sealant is compatible with transmission fluid.

Q3

What happens if I strip a bolt during installation or removal?

Stripping a bolt during installation or removal can be a serious issue. If the threads in the transmission case are stripped, it can require a specialized repair, such as using a Heli-Coil or Time-Sert thread repair kit. For a stripped bolt, carefully remove it, clean the threads on both the bolt and the hole and use a replacement bolt that meets OEM specifications. Prevention is best. Using the correct tools and applying smooth pressure are vital when working on the 8DCT.

Q4

Do I need to replace the bolts when servicing the 8DCT?

While not always required, it's good practice to replace certain bolts, especially stretch bolts or those prone to corrosion, when disassembling components of the 8DCT. Consult the Acura service manual for specific recommendations. Replace any bolts that show signs of damage, wear, or corrosion to prevent future issues. Always refer to the maintenance guidelines in your service manual for the most up-to-date recommendations.

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 calibrated torque wrench capable of measuring torque values within the specified range for the 8DCT transmission bolts.

  • Accurate torque measurement
  • Click-type mechanism for precise application
Learn more

Torque Wrench (3/8" Drive)

A smaller torque wrench for accessing some of the smaller bolts on the transmission.

  • Accurate torque measurement
  • Smaller drive size for accessing hard-to-reach places.
Learn more

Socket Set (Metric)

A comprehensive socket set with metric sizes that match the various bolt heads on the 8DCT transmission.

  • Variety of socket sizes
  • Durable construction
Learn more

Extension Bars

Various length extension bars to reach bolts in recessed areas of the transmission.

  • Provides increased reach
  • Allows access in tight spots
Learn more

Universal Joint Adapter

A swivel adapter that allows the socket to reach fasteners at an angle.

  • Enables angled access
  • Facilitates torque application in awkward spaces
Learn more
Service Procedures

8DCT Transmission Case Bolt Torque Procedure

Procedure for tightening the bolts that secure the transmission case halves together on the 8DCT transmission. Always follow a proper torque sequence.

  • Locate all transmission case bolts.
  • Using a 1/2" drive torque wrench, set the torque to 54 Nm (40 lb-ft).
  • Tighten the transmission case bolts in a cross-pattern sequence to ensure even clamping force.
  • Recheck torque on all bolts to ensure proper tightening.
  • Verify that the transmission case is completely sealed and there are no gaps.
  • Visually inspect the area for any leaks after reassembly.
View full procedure

8DCT Transmission Pan Bolt Torque Procedure

Procedure for tightening the transmission pan bolts on the 8DCT. Use a proper sequence.

  • Locate all transmission pan bolts.
  • Using a 3/8" drive torque wrench, set the torque to 12 Nm (9 lb-ft).
  • Tighten the transmission pan bolts in a cross-pattern sequence to ensure even clamping force.
  • Recheck torque on all bolts to ensure proper tightening.
  • Verify that the transmission pan is completely sealed and there are no gaps.
  • Visually inspect the area for any leaks after reassembly.
View full procedure

8DCT Mechatronics Unit Bolt Torque Procedure

Procedure for tightening the bolts securing the mechatronics unit to the 8DCT. Refer to a service manual for specific torque and sequence.

  • Locate all mechatronics unit bolts.
  • Using a 3/8" drive torque wrench, set the torque to 10 Nm (7 lb-ft).
  • Tighten the bolts in the specified torque sequence.
  • Recheck torque on all bolts to ensure proper tightening.
  • Verify the mechatronics unit is properly installed and secured.
  • Visually inspect the area for any leaks or misalignments.
View full procedure

8DCT Transmission Fluid Drain and Fill Bolt Torque Procedure

Procedure for tightening the fill and drain bolts. Use new crush washers.

  • Locate the fluid drain plug and the fill plug.
  • Using the specified size socket, remove the drain plug and allow the fluid to completely drain.
  • Install the drain plug using a new crush washer, and torque to 39 Nm (29 lb-ft) using a 1/2" torque wrench.
  • Locate the fluid fill plug and remove it.
  • Fill the transmission with new transmission fluid using the fill plug hole.
  • Install the fill plug using a new crush washer and torque to 39 Nm (29 lb-ft) using a 1/2" torque wrench.
View full procedure
Technical Service Bulletins

8DCT Transmission Case Bolt Re-Torque Procedure

2016-05-10

Some early production 8DCT transmissions may require a re-torque of the transmission case bolts due to potential issues with sealing.

2015-2016 Acura TLX

Resolution: Perform a re-torque of the transmission case bolts using the specified procedure and torque of 54 Nm (40 lb-ft) in a cross-pattern sequence.

8DCT Transmission Pan Leak Diagnostic

2017-02-22

Diagnostic procedure for cases of transmission pan leaks that can occur due to improper torque application.

2015-2017 Acura TLX

Resolution: Inspect the pan surface and pan gasket. Ensure proper pan bolt torque of 12 Nm (9 lb-ft) using a proper cross-pattern torque sequence. Replace the gasket if necessary.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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