Acura MDX 2007-2013 H6 Transmission Transmission Torque Specifications & Bolt Torque Values
Acura MDX 2007-2013

Acura MDX 2007-2013 H6 Transmission Torque Specifications

Detailed torque specifications for all bolts related to the H6 transmission assembly in the 2007-2013 Acura MDX, including bellhousing, pan, and mount bolts.

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 Case

Torque specifications for the main transmission case and related components.

1

Transmission Housing Bolts

M12 x 1.75
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even clamping pressure.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even gasket compression.
3

Torque Converter Housing Bolts

M12 x 1.75
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Tighten bolts in a star pattern, ensuring the torque converter housing is evenly seated.
4

Differential Carrier Bolts (if applicable)

M12 x 1.75
Torque Value
52 ft-lbs (70 N·m)
Important Notes
Tighten the differential carrier bolts in a criss-cross pattern to ensure proper and even clamping force. Estimated value, as the presence of the differential carrier can vary.
5

Side Cover Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Tighten the side cover bolts in a criss-cross pattern to ensure even clamping force. Estimated value, as the presence of a side cover can vary.

H6 Transmission Mount

Torque specifications for mounting the transmission to the chassis.

1

Transmission Mount Bolts (to Transmission)

M12 x 1.75
Torque Value
51 ft-lbs (69 N·m)
Important Notes
Ensure the mount is correctly aligned before tightening the bolts.

H6 Transmission Fluid System

Torque specifications for transmission fluid related components.

1

Transmission Fluid Drain Plug

M14 x 1.5
Torque Value
32 ft-lbs (44 N·m)
Important Notes
Use a new sealing washer when reinstalling the drain plug to ensure proper sealing.
2

Transmission Fluid Fill Plug

M14 x 1.5
Torque Value
32 ft-lbs (44 N·m)
Important Notes
Use a new sealing washer when reinstalling the fill plug to ensure proper sealing.
3

Transmission Cooler Line Fittings (Banjo Bolts)

M10 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Use new crush washers when reinstalling the banjo bolts to ensure a proper seal. Estimated value.

H6 Transmission Sensor And Controls

Torque specifications for sensors, solenoids, and linkages on the transmission.

1

Transmission Range Sensor Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Ensure correct alignment of the range sensor before tightening.
2

Shift Cable Bracket Bolts (to Transmission)

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Ensure shift cable bracket is properly aligned before tightening the bolts.
3

Solenoid Bolts (to Valve Body)

M5 x 0.8
Torque Value
6 ft-lbs (8 N·m)
Important Notes
Tighten the bolts evenly to avoid damaging the solenoid.
4

Transmission Control Module (TCM) Bolts

M6 x 1.0
Torque Value
7 ft-lbs (9 N·m)
Important Notes
Tighten these bolts carefully to avoid damaging the TCM. Estimated value.

H6 Transmission Internal Components

Torque specifications for internal components of the transmission.

1

Valve Body Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten the valve body bolts in a criss-cross pattern to avoid damage.
2

Transmission Input Shaft Bearing Retainer Bolts

M6 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure the retainer is properly positioned and the bolts are evenly torqued. Estimated value.
3

Transmission Output Shaft Bearing Retainer Bolts

M6 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure the retainer is properly positioned and the bolts are evenly torqued. Estimated value.
4

Transmission Internal Filter Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Ensure the filter is properly seated before tightening. Estimated value.

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 critical for transmission bolts?

Using the correct torque specification is crucial for several reasons. Under-torquing can lead to bolts loosening over time due to vibrations and stress, potentially causing leaks, component damage, or even catastrophic failure of the transmission. Over-torquing can stretch or break bolts, damage threads in the transmission case, or distort the mating surfaces, resulting in fluid leaks or component misalignment. Proper torque ensures even clamping force, creating a secure and reliable connection.

Q2

What type of lubricant, if any, should be used on the transmission bolts?

Generally, most transmission bolts for the H6 transmission on the 2007-2013 Acura MDX do not require additional lubricant on the threads unless specifically stated in the service manual. It is crucial to consult the Acura service manual for specific torque specifications, as they may include torque values with dry or lubricated threads. If lubrication is required, using the correct lubricant specified by Acura is highly recommended. Applying the wrong type can alter the torque reading and cause over or under tightening.

Q3

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

If you suspect a stripped bolt, immediately stop tightening. Attempting to torque a stripped bolt further can worsen the damage. First, assess the extent of the stripping. If it's minor, a thread repair kit might work. Otherwise, the bolt and possibly the mating component (i.e., transmission case) may need professional repair. Driving with a stripped bolt is unsafe and can lead to further damage. If the threads are in the transmission case it will require specialist repair and should not be attempted at home.

Q4

Should I replace transmission bolts every time I remove them?

While not always strictly necessary, it's often recommended to replace bolts that have been subjected to significant torque, especially if they are torque-to-yield bolts (check the Acura service manual for specific bolt type). Reusing bolts can be risky as they may have been stretched or weakened, which can cause issues in the future. For optimal performance and reliability, it is best practice to replace transmission bolts when working on the system.

Q5

What happens if I use a torque wrench improperly?

Improper torque wrench usage leads to inaccurate torque readings which could cause either under or over tightening. Example scenarios include, incorrectly setting the torque value, using an extension bar improperly, or failing to use the wrench in the correct axis. This will reduce reliability and increase risk of damage.

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 calibrated torque wrench is essential for accurate bolt tightening to prevent damage to the transmission case and components.

  • Measures torque in foot-pounds (ft-lbs) or Newton-meters (Nm)
  • Click-type or digital for accurate readings
Learn more

Socket Set

A socket set with appropriate sizes for transmission bolts.

  • Metric sizes
  • 6-point sockets recommended for better grip
Learn more

Extension Bars

Extension bars to reach recessed bolts around the transmission.

  • Various lengths
  • Swivel extensions for difficult angles
Learn more
Service Procedures

H6 Transmission Bolt Torque Procedure

This procedure outlines the proper steps for torquing bolts on the H6 transmission case of 2007-2013 Acura MDX models.

  • Identify the specific bolts to be torqued - (transmission case bolts, bellhousing bolts, etc.). Refer to a service manual or diagram for bolt locations.
  • Consult the appropriate torque specifications. Generally, transmission case bolts for the H6 transmission will require 33 ft-lbs(45 Nm). Always verify using specific service literature.
  • Use the appropriate socket size to fit the bolt head.
  • Set the torque wrench to the specified torque value.
  • Carefully tighten each bolt evenly. If multiple bolts are present, it is best to use a criss-cross pattern.
  • Torque each bolt to the specified value using a smooth, controlled motion. Do not jerk or overtighten.
  • Double-check all torqued bolts to ensure accuracy and consistency.
View full procedure

Transmission Mount Bolt Torque Procedure

Procedure for torquing transmission mount bolts

  • Identify the transmission mount bolt locations.
  • Consult the appropriate torque specifications for the transmission mount bolts - typically 47ft-lbs (64Nm).
  • Use the correct socket and any needed extensions.
  • Torque the bolts to the recommended value, often in a star pattern.
  • Double-check torque.
  • Inspect and replace damaged mounts as necessary.
View full procedure
Technical Service Bulletins

Transmission Case Bolt Loosening Issue

2010-06-15

Some 2007-2009 Acura MDX models have experienced issues with transmission case bolts loosening over time. This can lead to fluid leaks and potential transmission damage.

2007-2009

Resolution: Inspect transmission case bolts for proper torque. Re-torque to the specified value. Consider using a thread-locking compound on the bolts as a preventative measure for cases where bolts consistently loosen.

Torque Spec Correction: H6 Transmission

2011-02-28

A correction was issued for the H6 transmission housing bolts due to previous documentation errors. The specified torque is actually lower for the aluminum case.

2007-2013

Resolution: Always refer to the latest service literature to confirm torque specs. The correct specification for most case bolts is 33 ft-lbs (45Nm).

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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