Acura RDX 2007-2012 H5 Transmission Transmission Torque Specifications & Bolt Torque Values
Acura RDX 2007-2012

Acura RDX 2007-2012 H5 Transmission Torque Specifications

Detailed torque specifications for all bolts related to the H5 automatic transmission in the 2007-2012 Acura RDX. Includes bellhousing, pan, valve body, and other relevant 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

H5-transmission Case

Torque specifications for the H5 transmission case and related components.

1

Transmission Case Bolts (Housing Bolts)

M8 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on similar sized bolts. Tighten using a cross pattern to ensure even clamping force.
2

Transmission Mounting Bolts

M12 x 1.75
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the transmission to the engine block and/or subframe. Ensure proper alignment before tightening.
3

Shift Control Cable Bracket Bolts (to Transmission Case)

M6 x 1.0
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Ensure correct bracket positioning before tightening.

H5-transmission Oil Pan

Torque specifications for the H5 transmission oil pan and related components.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (9 N·m)
Important Notes
Tighten using a cross pattern to ensure even sealing pressure. Overtightening can damage the pan or gasket.

H5-transmission Fluid Plugs

Torque specifications for the H5 transmission fluid drain and fill plugs.

1

Transmission Drain and Fill Plugs

20mm x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Ensure proper sealing surface on the plug and case. Do not overtighten.

H5-transmission Drive Axle

Torque specifications for the H5 transmission drive axle and related components.

1

Drive Axle/Half Shaft Bolts (Inner CV Joint Flange)

M10 x 1.25
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Secures the inner CV joint flange to the transmission output flange. Ensure proper alignment.

H5-transmission Torque Converter

Torque specifications for the H5 transmission torque converter and related components.

1

Transmission Torque Converter Bolts/Nuts to Flexplate

M8 x 1.25
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Estimated torque value based on size. Tighten bolts evenly in a star pattern.

H5-transmission Internal Components

Torque specifications for H5 internal transmission components such as the valve body, sensors, etc.

1

Transmission Valve Body Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Estimated value for the valve body. Tighten bolts in a criss-cross pattern, working gradually to the final torque 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

What happens if I over-torque the transmission bolts?

Over-torquing can stretch or even break the bolts, potentially damaging the transmission housing and/or threads in the engine block/transmission case. This could lead to leaks, misalignment, and ultimately, significant repair costs. Always use a calibrated torque wrench to achieve the correct specification. For example, if a case bolt should be at 22 lb-ft, and is torqued to 35 lb-ft you risk damage, and may need to replace the bolt.

Q2

Can I reuse the transmission bolts?

While some bolts can be reused, it's generally recommended to replace transmission bolts, especially those involved in housing or critical component attachment, with new ones. Bolts can stretch after being torqued, which can affect their clamping force. Using new bolts ensures a proper seal and reliable holding power. Some bolts may be torque-to-yield (TTY) and MUST be replaced.

Q3

Do I need to use threadlocker on the transmission bolts?

It depends on the specific bolt and location. For most transmission housing bolts, a threadlocker is not usually specified by Acura, but for certain critical fasteners, a medium-strength threadlocker (such as Loctite 242) might be recommended by the manufacturer. Always consult the repair manual for the proper application of thread locker if needed, and follow the manufacturer's instructions carefully. For example, if specified, do not use red thread locker unless the manual states it, as it may be too hard to remove later.

Q4

What type of torque wrench should I use?

Use a calibrated torque wrench that is suitable for the range of torque specifications required for your work. For most transmission bolts on an H5 transmission, a 3/8" drive torque wrench with a range of 10-80 ft-lbs is usually suitable. Make sure your wrench is within calibration, as inaccurate readings can lead to improper tightening. It is generally recommended to have your torque wrench calibrated every year.

Q5

Why are there different torque specifications for different bolts on the H5 transmission?

Different torque specifications are used because different bolts are exposed to different shear and tension forces. These varying specifications accommodate different bolt sizes and material compositions, as well as the components they are securing. Improperly tightened bolts can lead to joint failure, leaks, and damage. A small bolt securing a sensor is very different than a large bolt holding the transmission case together.

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 inch Drive)

A calibrated torque wrench capable of measuring torque in the specified range for the H5 transmission bolts.

  • Accurate torque settings
  • Ratchet mechanism
  • 1/2 inch drive size
Learn more

Socket Set (10mm - 19mm)

A set of standard sockets necessary to fit the various bolt heads found on the H5 transmission.

  • Various sizes from 10mm to 19mm
  • 6-point sockets recommended
  • Deep well sockets for recessed bolts
Learn more

Extension Bars (Various Lengths)

Extension bars for reaching recessed bolts on the H5 transmission.

  • 1/2 inch drive size
  • Various lengths for accessibility
  • Sturdy construction
Learn more

Universal Joint

Universal joint adapter for accessing bolts at awkward angles.

  • 1/2 inch drive size
  • Durable construction
  • Smooth articulation
Learn more
Service Procedures

H5 Transmission Bell Housing Bolt Torque Procedure

Procedure for torquing the bolts connecting the transmission to the engine block.

  • Clean all bolt threads thoroughly.
  • Apply a light coating of engine oil to the bolt threads.
  • Install all bolts by hand.
  • Torque all bolts in a star pattern to 33 lb-ft (45 Nm).
  • Recheck torque of all bolts in the star pattern.
View full procedure

H5 Transmission Mount Bolt Torque Procedure

Procedure for torquing the bolts securing the transmission mounts to the chassis and transmission.

  • Clean all bolt threads thoroughly.
  • Install all bolts by hand.
  • Torque the upper mounting bolts to 47 lb-ft (64 Nm).
  • Torque the lower mounting bolts to 40 lb-ft (54 Nm).
  • Recheck torque of all bolts.
View full procedure

H5 Transmission Case Bolt Torque Procedure

Procedure for torquing the bolts securing the transmission case halves together.

  • Clean all bolt threads thoroughly.
  • Install all bolts by hand.
  • Torque all bolts to 22 lb-ft (30 Nm).
  • Recheck torque of all bolts.
View full procedure
Technical Service Bulletins

H5 Transmission Bell Housing Bolt Loosening

2010-05-15

Some 2007-2009 RDX models have exhibited bell housing bolt loosening due to thermal expansion/contraction cycling.

2007-2009

Resolution: Inspect bell housing bolts for proper torque at each oil change and re-torque to 33 lb-ft (45 Nm).

H5 Transmission Mount Bolt Failure

2011-12-01

A small number of 2010-2012 RDX models have reported premature failure of transmission mount bolts due to corrosion.

2010-2012

Resolution: Inspect transmission mount bolts for corrosion. Replace any corroded bolts and torque to specified values. Consider applying anti-seize compound to bolt threads.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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