Acura TL 2004-2008 H5 Transmission Transmission Torque Specifications & Bolt Torque Values
Acura TL 2004-2008

Acura TL 2004-2008 H5 Transmission Torque Specifications

Detailed torque specifications for all bolts on the H5 automatic transmission found in the 2004-2008 Acura TL. Includes bell housing, case, pan, 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 Mounting

Torque specifications for mounting the H5 transmission to the engine and chassis.

1

Transmission Mounting Bolts

M12 x 1.25
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Ensure bolts are of correct grade and length. Clean threads before installation.

H5-transmission Case

Torque specifications for the H5 transmission case bolts.

1

Transmission Case Bolts (8mm)

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Estimated value. Check service manual for specific locations. Apply in a gradual, even pattern
2

Transmission Case Bolts (10mm)

M10 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Estimated value. Check service manual for specific locations. Apply in a gradual, even pattern

H5-transmission Oil Pan

Torque specifications for the H5 transmission oil pan bolts.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Use a new gasket. Tighten bolts in a criss-cross pattern.

H5-transmission Drain Fill

Torque specifications for the H5 transmission drain and fill plugs.

1

Transmission Drain Plug

M18 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use a new sealing washer. Do not over-tighten.
2

Transmission Fill Plug

M18 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use a new sealing washer. Do not over-tighten.

H5-transmission Drive Axle

Torque specifications for drive axle and CV joint components.

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Ensure proper seating of the axle flange to the transmission output.
2

CV Joint/Axle Nut

M22 x 1.5
Torque Value
181 ft-lbs (245 N·m)
Important Notes
Use a new nut if necessary. Ensure proper seating of the CV joint.

H5-transmission Shift Linkage

Torque specifications for the H5 transmission shift linkage components.

1

Shift Linkage Bolts/Nuts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Estimated value, specific locations may vary. Refer to service manual.

H5-transmission Clutch Fork

Torque specifications for the H5 transmission clutch fork bolts.

1

Manual Transmission Clutch Fork Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Estimated value. Ensure clutch fork moves freely.

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 overtighten the transmission bolts?

Overtightening bolts can stretch or break them, potentially damaging the transmission housing or the threads within the engine block. This can lead to fluid leaks, misalignments, and costly repairs. It is crucial to use a properly calibrated torque wrench and adhere to the specified torque values.

Q2

Can I use thread locker on the transmission bolts?

While some fasteners might benefit from thread locker, it's generally NOT recommended for the main transmission housing bolts on the H5. These bolts are designed to maintain a specific clamping force and using thread locker can interfere with this. However, using thread locker on smaller components, like pan bolts, might be appropriate, but always consult the factory service manual for specific instructions.

Q3

Do I need to replace the transmission bolts when servicing the transmission?

While not always necessary, it is generally recommended to replace torque-to-yield bolts and bolts that have been stressed when servicing the transmission. If you are unsure or the vehicle has high mileage, replacing the bolts will remove potential issues when the unit is reinstalled. Inspect the bolts for damage, stretching, or corrosion. If any issues are present, replace them with new bolts that meet the factory specs. This can help ensure proper clamping force and prevent future issues.

Q4

How often should I check transmission bolt torque?

Under normal use, checking the torque on transmission bolts is not part of routine maintenance. However, if the transmission has been recently removed and reinstalled, it’s good practice to recheck the torque after a short drive cycle. Also, if you experience fluid leaks from the mating surface of the engine and transmission, checking the torque can be part of the diagnostic procedure.

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 1/2 inch drive torque wrench capable of measuring torque within the required ranges for the H5 transmission bolts.

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

Socket Set (10mm, 12mm, 14mm, 17mm)

A set of sockets including the specific sizes commonly used on the H5 transmission casing and mounting bolts.

  • Various sizes to accommodate all bolts
  • Durable construction
Learn more

Extension Bars (3 inch, 6 inch)

Extension bars to allow access to recessed or difficult to reach bolts.

  • Provides additional reach
  • Increases flexibility in tool use
Learn more

Universal Joint Socket

A universal joint socket to access bolts at an angle.

  • Allows for angled access
  • Prevents rounding of bolts
Learn more
Service Procedures

H5 Transmission Case Bolt Torque Procedure

This procedure outlines the steps for properly torquing the bolts on the H5 transmission case.

  • Identify the specific bolt locations and sizes.
  • Consult the service manual for the correct torque specification for each bolt (typically 22 ft-lbs or 30 Nm for the case bolts and bell housing bolts)
  • Attach the appropriate socket to the torque wrench.
  • Set the torque wrench to the specified value.
  • Apply the socket to the bolt.
  • Slowly tighten the bolt until the torque wrench clicks.
  • Repeat steps 3-6 for all case bolts in a criss-cross pattern.
  • Double-check torque values to ensure proper tightening.
View full procedure

H5 Transmission Mounting Bolt Torque Procedure

This procedure outlines the steps for properly torquing the H5 transmission mounting bolts.

  • Identify the specific transmission mount bolt locations.
  • Consult the service manual for the correct torque specification for each bolt (typically around 47 ft-lbs or 64Nm).
  • Attach the appropriate socket to the torque wrench.
  • Set the torque wrench to the specified value.
  • Apply the socket to the bolt.
  • Slowly tighten the bolt until the torque wrench clicks.
  • Repeat steps 3-6 for all mounting bolts.
  • Double-check torque values to ensure proper tightening.
View full procedure
Technical Service Bulletins

Excessive Transmission Case Bolt Loosening

2007-03-15

Some 2004-2006 Acura TL models have reported issues with excessive loosening of transmission case bolts. This can lead to fluid leaks and potential damage.

2004-2006 Acura TL

Resolution: Inspect all transmission case bolts for proper torque. If bolts are loose, re-torque them to the specified values. Consider using thread locking compound for added security, but it is not required.

Transmission Mounting Bolt Corrosion Issues

2008-09-22

Certain regions experience high rates of corrosion on transmission mounting bolts, potentially affecting torque retention. Corrosion may cause the transmission to sag over time.

2004-2008 Acura TL

Resolution: Inspect transmission mounting bolts for corrosion. If severe, replace with new, genuine Acura bolts and use anti-seize compound during reinstallation. Ensure proper torque is applied after replacement.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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