Acura TLX 2015-2020 H6 Transmission Transmission Torque Specifications & Bolt Torque Values
Acura TLX 2015-2020

Acura TLX 2015-2020 H6 Transmission Torque Specifications

Detailed torque specifications for the H6 transmission bolts on the 2015-2020 Acura TLX. Includes bolt locations and torque values.

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

H6-transmission Mounting

Torque specifications for mounting the H6 transmission to the engine and chassis.

1

Transmission Mounting Bolts

M12 x 1.75 (Estimated)
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Ensure transmission is properly aligned before tightening. Estimated bolt size.

H6-transmission Case

Torque specifications for the main case and related components.

1

Transmission Case Bolts

M8 x 1.25 (Estimated)
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even pressure. Estimated bolt size.

H6-transmission Oil Pan

Torque specifications for the transmission oil pan.

1

Transmission Oil Pan Bolts

M6 x 1.0 (Estimated)
Torque Value
5.9 ft-lbs (8 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even gasket compression. Use new gasket. Estimated bolt size.

H6-transmission Valve Body

Torque specifications for the transmission valve body.

1

Transmission Valve Body Bolts

M6 x 1.0 (Estimated)
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten carefully in a criss-cross pattern. These bolts are small and easily over-torqued. Estimated bolt size.

H6-transmission Fluid Plugs

Torque specifications for the transmission fluid drain and fill plugs.

1

Transmission Drain and Fill Plugs

Varies (typically M18 x 1.5 for drain, M18 x 1.5 for fill) (Estimated)
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use new crush washers/seals. Estimated bolt size.

H6-transmission Drive Axle

Torque specifications for drive axle/half shaft bolts and nuts.

1

Drive Axle/Half Shaft Bolts

M8 x 1.25 (Estimated)
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Ensure the CV joint is properly seated before tightening. Estimated bolt size.
2

CV Joint/Axle Nut

M24 x 1.5 (Estimated)
Torque Value
177 ft-lbs (240 N·m)
Important Notes
Use a new axle nut and torque to spec. Estimated bolt size.

H6-transmission Fluid Cooler Lines

Torque specifications for the transmission fluid cooler line fittings.

1

Transmission Fluid Cooler Line Fittings

Varies (typically M14 x 1.5 / M17 x 1.5)
Torque Value
23 ft-lbs (31 N·m)
Important Notes
Use a flare wrench to avoid rounding the fittings. Estimated values.

H6-transmission Range Switches

Torque specifications for transmission range and reverse switch/sensor bolts.

1

Transmission Range Switch/Sensor Bolts

M6 x 1.0 (Estimated)
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten. Estimated bolt size.
2

Reverse Switch/Sensor Bolt

M6 x 1.0 (Estimated)
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten. Estimated bolt size.

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 so important for transmission bolts?

Using the correct torque specification is crucial to ensure a secure and leak-free seal between the transmission and engine or other components. Under-torquing can lead to leaks, vibrations, and the bolts loosening over time, potentially causing catastrophic damage. Over-torquing can stretch or break the bolts, damage the transmission case, and also lead to leaks. The h6 transmission in the Acura TLX relies on precise clamping force to maintain its integrity.

Q2

What happens if I over-tighten a transmission bolt?

Over-tightening a bolt, especially on the h6 transmission, can cause several issues. The threads of the bolt or the transmission case can become stripped, requiring costly repairs, including potentially needing to replace the transmission housing. The bolt itself can also stretch or fracture, weakening the connection or causing a complete failure. Additionally, the sealing surfaces may be deformed, creating leak paths. It’s best to always double-check your torque readings.

Q3

Should I use thread locker on the transmission bolts?

Typically, thread locker is not required on the transmission bolts of a 2015-2020 Acura TLX, unless explicitly specified in the factory service manual. However, if you are removing and reinstalling transmission bolts multiple times or if they have shown a tendency to loosen, using a medium-strength (blue) thread locker can be beneficial. Always refer to the specific manufacturer's service manual for guidance, as thread locker application may vary across different bolt locations on the h6 transmission.

Q4

What type of wrench should I use when tightening the transmission bolts?

A torque wrench is essential for tightening transmission bolts to their specified torque. Avoid using impact wrenches or standard ratchets for final tightening as they offer less precision and can easily result in over- or under-torquing. Use a calibrated torque wrench within its operating range, ensuring it's accurate. A 3/8” or 1/2” drive torque wrench is usually adequate for most transmission bolts on the TLX h6 transmission.

Q5

What should I do if I suspect a transmission bolt is damaged?

If a transmission bolt is damaged, showing signs of thread wear, stretching, or corrosion, it MUST be replaced. Do not reuse a damaged bolt, as it will compromise the structural integrity of the transmission mounting and potentially create a leak. Order a replacement from the manufacturer or an authorized dealer ensuring you get the correct specification, material and length for your specific bolt location. Ignoring a damaged bolt can lead to far greater damage in the future.

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 within the specified range for transmission bolts.

  • Accurate torque measurement
  • Click-type mechanism for consistent results
Learn more

Torque Wrench (3/8" drive)

A calibrated torque wrench capable of measuring torque within the specified range for smaller transmission bolts and sensors.

  • Accurate torque measurement
  • Click-type mechanism for consistent results
Learn more

Socket Set (1/2" and 3/8" drive)

A set of sockets in various sizes, including the specific sizes needed for the h6-transmission bolts.

  • Durable construction
  • Various sizes for different bolt heads
Learn more

Socket Extensions

Socket extensions of various lengths to access recessed bolts.

  • Durable construction
  • Various lengths to reach difficult to access areas
Learn more

Universal Joint

A universal joint to allow socket articulation for bolts at an angle.

  • Durable construction
  • Allows for angles sockets
Learn more
Service Procedures

H6-Transmission Bellhousing Bolt Torque Procedure

Procedure for torquing the bellhousing bolts of the H6 transmission in 2015-2020 Acura TLX models.

  • Locate all bellhousing bolts.
  • Ensure all bolt threads are clean and undamaged.
  • Install all bolts finger tight, then snug them lightly.
  • Torque the bellhousing bolts to 47 lb-ft (64 Nm) in a criss-cross pattern.
  • Verify all bolts are torqued to the correct specification using a calibrated torque wrench.
View full procedure

H6-Transmission Mount Bolt Torque Procedure

Procedure for torquing the transmission mount bolts of the H6 transmission in 2015-2020 Acura TLX models.

  • Locate all transmission mount bolts.
  • Ensure all bolt threads are clean and undamaged.
  • Install all bolts finger tight, then snug them lightly.
  • Torque the transmission mount bolts to 40 lb-ft (54 Nm).
  • Verify all bolts are torqued to the correct specification using a calibrated torque wrench.
View full procedure

H6-Transmission Case Bolt Torque Procedure

Procedure for torquing the transmission case bolts of the H6 transmission in 2015-2020 Acura TLX models.

  • Locate all transmission case bolts.
  • Ensure all bolt threads are clean and undamaged.
  • Install all bolts finger tight, then snug them lightly.
  • Torque the transmission case bolts to 29 lb-ft (39 Nm).
  • Verify all bolts are torqued to the correct specification using a calibrated torque wrench.
View full procedure
Technical Service Bulletins

Incorrect Transmission Bolt Torque Specification

2017-03-15

A service bulletin was issued regarding an incorrect torque specification printed in some early service manuals. This bulletin clarifies the correct torque values for the h6-transmission bolts.

2015-2017 Acura TLX

Resolution: Refer to the current updated service manual for the correct torque specifications: Bellhousing bolts: 47 lb-ft (64 Nm), Transmission mount bolts: 40 lb-ft (54 Nm), Case Bolts: 29 lb-ft (39 Nm)

Transmission Bolt Thread Damage

2019-08-22

A service bulletin was issued concerning thread damage during transmission removal and installation. Proper inspection and procedures are critical to avoid damage to transmission housing threads.

2015-2020 Acura TLX

Resolution: Inspect all bolt threads and the transmission housing for damage. If damage is found, use thread repair tools and replacement bolts as necessary to repair.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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