Acura TL 2004-2008 Drivetrain Bolt Torque Specifications & Fastener Values
Acura TL 2004-2008

Acura TL 2004-2008 Drivetrain Bolt Torque Specifications

This page provides detailed torque specifications for drivetrain bolts on the 2004-2008 Acura TL, including transmission, driveshaft, and differential components.

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

Drivetrain Flywheel

Torque specifications for the flywheel and related components.

1

Flywheel Bolts

M10 x 1.25
Torque Value
76 ft-lbs (103 N·m)
Important Notes
Tighten in a crisscross pattern.

Drivetrain Clutch

Torque specifications for the clutch components.

1

Clutch Pressure Plate Bolts

M8 x 1.25
Torque Value
19 ft-lbs (26 N·m)
Important Notes
Tighten in a crisscross pattern. Ensure proper alignment of the clutch disc.

Drivetrain Transmission

Torque specifications for the transmission and related components.

1

Transmission Mounting Bolts

M12 x 1.75
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Tighten in a sequence that pulls the transmission evenly to the engine. Check alignment after installation.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a crisscross pattern to ensure even gasket compression.
3

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use a new sealing washer for the drain plug. Ensure the threads are clean before installing.
4

Transmission Output Shaft Flange Nut/Bolt

M10 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Ensure the flange is properly seated before tightening. This torque spec is estimated.

Drivetrain Drive Axle

Torque specifications for the drive axle and related components.

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Tighten in a crisscross pattern.
2

CV Joint/Axle Nut

M22 x 1.5
Torque Value
181 ft-lbs (245 N·m)
Important Notes
Ensure the nut is properly engaged on the threads. Use a new nut if specified by the manufacturer.

Drivetrain Propeller Shaft

Torque specifications for the propeller shaft and related components.

1

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Value
43 ft-lbs (58 N·m)
Important Notes
Tighten in a crisscross pattern.

Drivetrain Differential

Torque specifications for the differential and related components.

1

Differential Drain/Fill Plug

M18 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use a new sealing washer for the drain plug. Ensure the threads are clean before installing.
2

Differential Mounting Bolts

M12 x 1.75
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Tighten in a sequence that pulls the differential evenly to the chassis/subframe. This value is an estimate.
3

Ring Gear Bolts

M12 x 1.5
Torque Value
80 ft-lbs (108 N·m)
Important Notes
Tighten in a crisscross pattern to evenly distribute clamping force.
4

Pinion Gear Nut

M24 x 1.5
Torque Value
130 ft-lbs (176 N·m)
Important Notes
This nut preloads the pinion bearings. Proper torque is critical for proper operation. This value is estimated.

Drivetrain Transfer Case

Torque specifications for the transfer case and related components.

1

Transfer Case Drain/Fill Plug

M18 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use a new sealing washer for the drain plug. Ensure the threads are clean before installing.

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?

Using the correct torque specification ensures that bolts are tightened to the appropriate tension. Under-torquing can lead to bolts loosening over time, causing component failure or damage. Over-torquing can stretch or break bolts, damage threads, and compromise the integrity of the assembly. For example, over-torquing a driveshaft bolt could lead to premature failure of the joint.

Q2

What should I do if I accidentally over-torqued a bolt?

If you suspect you have over-torqued a bolt, it's best to replace it, especially critical drivetrain bolts. Over-torquing can stretch or weaken the bolt. For a driveshaft bolt, for instance, this could lead to failure under load. Remove the bolt, inspect the threads on both the bolt and the receiving hole, and replace with a new bolt torqued to the specification.

Q3

Do I need to use new bolts each time I reassemble components?

It's generally recommended to use new bolts, especially for critical drivetrain components. Bolts can stretch and weaken with each use, and reusing them can compromise the assembly. This is especially important for torque-to-yield bolts where a single time use is required. Some components like the drive shaft, for example, may specifically require new fasteners.

Q4

What type of lubricant should I use on drivetrain bolts?

The type of lubricant, if any, is crucial for achieving the correct torque. Some bolts require clean, dry threads, while others may specify a particular oil or anti-seize compound. Always refer to the factory service manual for specific instructions related to the fastener being installed. Using an incorrect lubricant can lead to inaccurate torque values and potential issues with the assembly.

Q5

How often should I check the torque on drivetrain bolts?

Drivetrain bolts should be checked periodically, especially after major repairs or if you have noticed any unusual noises or vibrations. As a general practice it is good to check them at every other oil change, or when you have to service other drivetrain components. If you've recently removed a component like the axles, it's wise to double-check the torque specifications after a few hundred miles of driving.

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 is essential for accurately tightening bolts to specified torque values. A 1/2 inch drive is recommended for most drivetrain components.

  • Wide torque range
  • Click-type mechanism for accurate measurement
  • Durable construction
Learn more

Torque Wrench (3/8 inch drive)

A smaller 3/8 inch drive torque wrench is useful for lower torque applications on smaller drivetrain components.

  • Lower torque range
  • Click-type mechanism for accurate measurement
  • Compact size
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets, including standard and deep sockets, is needed to fit various bolt and nut sizes in the drivetrain.

  • Various sizes to fit most bolts
  • Durable construction
  • 6-point design for secure grip
Learn more

Socket Extensions

Socket extensions of varying lengths are crucial for reaching bolts in recessed or difficult-to-access areas of the drivetrain.

  • Varying lengths
  • Durable construction
  • Secure connection
Learn more

U-Joint Adapter

A U-joint adapter, sometimes called a swivel adapter, allows for torque application at an angle when bolts are not aligned with the tool.

  • Allows angled torque application
  • Durable construction
  • Secure fit
Learn more
Service Procedures

Driveshaft Bolt Torque Procedure

This procedure outlines the process of torquing the driveshaft bolts on a 2004-2008 Acura TL. Proper torque is crucial for secure driveshaft connections and safe operation.

  • Locate the driveshaft bolts at the differential and transmission flanges.
  • Ensure the threads of bolts and receiving holes are clean.
  • Apply a light coating of anti-seize to the threads (optional, recommended for corrosion prevention).
  • Install the driveshaft bolts finger-tight.
  • Using the appropriate socket, tighten all bolts to half of the specified torque value, in a star pattern.
  • Tighten all bolts again to the full specified torque value, in a star pattern. Refer to specifications for exact value
  • Re-check the torque of all bolts after final tightening to verify they are properly tightened.
View full procedure

Transmission Mount Bolt Torque Procedure

This procedure outlines the process of torquing the transmission mount bolts on a 2004-2008 Acura TL. Proper torque is critical for maintaining proper engine and transmission alignment.

  • Locate the transmission mount bolts, both to the transmission and the body of the car.
  • Ensure the threads of bolts and receiving holes are clean.
  • Apply a light coating of anti-seize to the threads (optional, recommended for corrosion prevention).
  • Install the transmission mount bolts finger-tight.
  • Using the appropriate socket, tighten all bolts to half of the specified torque value.
  • Tighten all bolts again to the full specified torque value. Refer to specifications for exact value
  • Re-check the torque of all bolts after final tightening to verify they are properly tightened.
View full procedure

Differential Mounting Bolt Torque Procedure

This procedure outlines the process of torquing the differential mounting bolts on a 2004-2008 Acura TL. Proper torque is essential for differential stability and vibration reduction.

  • Locate the differential mounting bolts, both to the subframe and to the rear suspension components
  • Ensure the threads of bolts and receiving holes are clean.
  • Apply a light coating of anti-seize to the threads (optional, recommended for corrosion prevention).
  • Install the differential mounting bolts finger-tight.
  • Using the appropriate socket, tighten all bolts to half of the specified torque value.
  • Tighten all bolts again to the full specified torque value. Refer to specifications for exact value
  • Re-check the torque of all bolts after final tightening to verify they are properly tightened.
View full procedure
Technical Service Bulletins

Driveshaft Bolt Loosening Issue

2006-05-15

Some 2004-2006 Acura TL models may experience driveshaft bolt loosening due to improper initial torque during assembly. This can cause vibration and damage.

2004-2006

Resolution: Inspect driveshaft bolts for signs of looseness. Re-torque all bolts to the specified torque value using a calibrated torque wrench. Consider using new bolts and anti-seize compound. Follow the correct torque procedure.

Transmission Mount Vibration

2007-09-20

Excessive transmission mount movement or vibration on 2004-2008 Acura TL models. Could be due to bolts loosening.

2004-2008

Resolution: Inspect transmission mount bolts for correct torque. Replace mount if damaged. Ensure proper bolt torque is achieved.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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