Audi Audi S6 2006-2011 Drivetrain Bolt Torque Specifications & Fastener Values
Audi Audi S6 2006-2011

Audi Audi S6 2006-2011 Drivetrain Bolt Torque Specifications

Comprehensive list of torque specifications for drivetrain bolts on the 2006-2011 Audi S6 (C6) model, including transmission, differential, and axle 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

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Torque Calculator

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Transmission

Torque specifications for the 09E 6-speed automatic transmission, including case, valve body, and mounting components.

1

Transmission Case Bolts (Smaller)

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the transmission case halves together. Critical for maintaining transmission fluid seal and structural integrity.
2

Transmission Case Bolts (Larger)

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Secures the transmission case halves together, specifically where higher stress is present. Critical for maintaining transmission fluid seal and structural integrity.
3

Valve Body Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Attaches the valve body to the transmission. Proper torque ensures correct valve body function and prevents leaks.
4

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (9.5 N·m)
Important Notes
Secures the oil pan to the transmission case. Proper torque prevents leaks and maintains the oil seal. Use a new gasket if required.
5

Torque Converter Bolts

M10 x 1.25
Important Notes
Secures the torque converter to the flexplate. Essential for transferring engine power to the transmission. **Safety Critical** - Angle torque is important for proper bolt stretch and preventing loosening. Always use new bolts.
6

Transmission Mount Bolts

M10 x 1.5
Torque Value
40 ft-lbs (55 N·m)
Important Notes
Attaches the transmission to the vehicle chassis. Essential for securing the transmission and isolating vibrations.
7

Transmission Mount Bracket Bolts to Transmission

M12 x 1.75
Torque Value
60 ft-lbs (80 N·m)
Important Notes
Secure the mounting bracket to the transmission housing. Estimated value.
8

Transmission Mount Bracket Bolts to Chassis

M12 x 1.75
Torque Value
60 ft-lbs (80 N·m)
Important Notes
Secure the mounting bracket to the vehicle frame. Estimated value.
9

Output Flange Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Connects the output flange to the driveshaft. Critical for transferring rotational force.

Front Differential

Torque specifications for the front differential, which is integrated with the transmission on this model.

1

Differential Housing Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the differential case halves. Maintains gear alignment and fluid seal.
2

Differential Cover Bolts

M6 x 1.0
Torque Value
7 ft-lbs (9.5 N·m)
Important Notes
Secures the differential cover. Prevents leaks and maintains the fluid seal.
3

Ring Gear Bolts

M12 x 1.5
Important Notes
Secures the ring gear to the differential case. Crucial for proper power transfer and differential operation. **Safety Critical**. Always use new bolts.
4

Pinion Flange Nut

M22 x 1.5
Important Notes
Secures the pinion flange, affecting bearing preload. Crucial for proper differential operation and avoiding premature failure. **Safety Critical**. Requires specialized tool for tightening. Angle torque specification can vary, but 45 degrees is a good estimate. Verify using a service manual.
5

Driveshaft to Differential Input Flange

M10 x 1.5
Torque Value
40 ft-lbs (55 N·m)
Important Notes
Secure the driveshaft to the differential input.

Rear Differential

Torque specifications for the rear differential, including housing, cover, and mounting components.

1

Differential Housing Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the differential housing halves. Maintains gear alignment and fluid seal.
2

Differential Cover Bolts

M6 x 1.0
Torque Value
7 ft-lbs (9.5 N·m)
Important Notes
Secures the differential cover. Prevents leaks and maintains the fluid seal.
3

Ring Gear Bolts

M12 x 1.5
Important Notes
Secures the ring gear to the differential case. Crucial for proper power transfer and differential operation. **Safety Critical**. Always use new bolts.
4

Pinion Flange Nut

M22 x 1.5
Important Notes
Secures the pinion flange, affecting bearing preload. Crucial for proper differential operation and avoiding premature failure. **Safety Critical**. Requires specialized tool for tightening. Angle torque specification can vary, but 45 degrees is a good estimate. Verify using a service manual.
5

Rear Differential Mount Bolts

M10 x 1.5
Torque Value
40 ft-lbs (55 N·m)
Important Notes
Mounts the rear differential to the vehicle chassis. Estimated value.
6

Driveshaft to Differential Input Flange

M10 x 1.5
Torque Value
40 ft-lbs (55 N·m)
Important Notes
Secure the driveshaft to the differential input.

Driveshaft

Torque specifications for the driveshaft components, including center support bearing and flange bolts.

1

Center Support Bearing Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the center support bearing to the vehicle chassis, critical for reducing driveshaft vibration. Estimated value.
2

Driveshaft Flange Bolts

M10 x 1.5
Torque Value
40 ft-lbs (55 N·m)
Important Notes
Connects the driveshaft to the transmission/differential flanges. Essential for power transfer.

Axles

Torque specifications for the axle components, including CV joint bolts and axle nuts.

1

Inner CV Joint Bolts

M10 x 1.5
Torque Value
40 ft-lbs (55 N·m)
Important Notes
Secures the inner CV joint to the transmission or differential output flange. Critical for power transfer to the wheels. Often uses a triple square drive.
2

Outer CV Joint Axle Nut

M24 x 1.5
Important Notes
Secures the wheel hub to the axle. Critical for maintaining wheel bearing preload and axle security. **Safety Critical**, Always use new nut.
3

Suspension to Axle Carrier Bolts

M12 x 1.75
Torque Value
60 ft-lbs (80 N·m)
Important Notes
Attaches the suspension components to the axle carrier. Estimated value.

Wheel Hubs

Torque specifications for wheel hub and bearing components.

1

Wheel Bearing Bolts

M14 x 1.5
Important Notes
Secure the wheel bearing assembly. Critical for wheel bearing preload and wheel security. **Safety Critical** Always use new bolts. Sizes may vary. Verify using a service manual

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 crucial?

Using the correct torque specification ensures proper clamping force. Too little torque can lead to fasteners loosening during operation, causing component failure. Too much torque can strip threads, damage components, and even cause bolt failure. For example, an overtightened driveshaft bolt could shear under load, leading to loss of power transfer and potentially hazardous situations.

Q2

Where can I find the exact torque specifications for my specific model year?

The most reliable source for torque specifications is the official Audi service manual for your 2006-2011 S6. Aftermarket repair manuals like Bentley or Haynes also provide torque values. However, always double-check against official Audi documentation when possible. Online databases and forums can be helpful, but verify their reliability against other sources.

Q3

What type of lubricant should be used on drivetrain fasteners?

Unless specifically noted otherwise by Audi, typically no lubricant is applied to drivetrain fasteners. Some manufacturers specify the use of threadlocker, such as Loctite, on certain fasteners. Always check the repair manual. Using the wrong lubricant can affect torque readings and clamping force, potentially leading to fastener failure. Never apply oil or grease to dry torque spec fasteners.

Q4

Should I replace bolts after removing them?

Many drivetrain bolts, especially those that are torque-to-yield (TTY) or stretch bolts, should be replaced every time they are removed. TTY bolts are designed to stretch upon tightening, and reusing them can lead to improper clamping and failure. Examples include driveshaft bolts and certain subframe bolts. Check the service manual for the specific bolt you are working with.

Q5

What does 'torque-to-yield' mean?

Torque-to-yield (TTY) or stretch bolts are designed to stretch beyond their elastic limit when tightened. This creates a very specific clamping force that is more accurate than simple torque. They must be replaced each time they are removed because they become permanently deformed. Many modern Audi drivetrain bolts are TTY.

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 is essential for applying precise torque to drivetrain bolts.

  • Wide torque range (typically 20-250 ft-lbs)
  • Click-type or digital display for accurate readings
  • 1/2" drive for compatibility with common sockets
Learn more

Torque Wrench (3/8" Drive)

A smaller torque wrench for lower torque applications within the drivetrain.

  • Lower torque range (typically 5-80 ft-lbs)
  • Click-type or digital display for accurate readings
  • 3/8" drive for smaller fasteners
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is required for various drivetrain bolt sizes.

  • Variety of sizes (typically 8mm-24mm)
  • 6-point design for secure grip
  • Standard and deep sockets for different access needs
Learn more

Various Extensions and Universal Joints

Extensions and universal joints are necessary to access hard to reach drivetrain bolts.

  • Variety of sizes and lengths
  • Durable construction
  • Allows access to difficult areas
Learn more
Service Procedures

Front Differential Bolt Torque Procedure

Procedure for torquing bolts on the front differential of the 2006-2011 Audi S6.

  • Locate all front differential mounting bolts.
  • Clean all bolts and mating surfaces.
  • Hand-tighten all bolts first.
  • Using the appropriate torque wrench and socket, torque the bolts to 45 Nm + 90 deg. (consult official repair manual for specific values).
  • Verify all bolts are tightened correctly.
View full procedure

Rear Differential Bolt Torque Procedure

Procedure for torquing bolts on the rear differential of the 2006-2011 Audi S6.

  • Locate all rear differential mounting bolts.
  • Clean all bolts and mating surfaces.
  • Hand-tighten all bolts first.
  • Using the appropriate torque wrench and socket, torque the bolts to 50 Nm + 90 deg (consult official repair manual for specific values).
  • Verify all bolts are tightened correctly.
View full procedure

Driveshaft Bolt Torque Procedure

Procedure for torquing bolts on the driveshaft of the 2006-2011 Audi S6.

  • Locate all driveshaft mounting bolts (both at the transmission and differential ends).
  • Clean all bolts and mating surfaces.
  • Hand-tighten all bolts first.
  • Using the appropriate torque wrench and socket, torque the bolts to 40 Nm (consult official repair manual for specific values).
  • Verify all bolts are tightened correctly.
View full procedure

Transmission Mounting Bolt Torque Procedure

Procedure for torquing bolts on the transmission mounts of the 2006-2011 Audi S6.

  • Locate all transmission mount bolts.
  • Clean all bolts and mating surfaces.
  • Hand-tighten all bolts first.
  • Using the appropriate torque wrench and socket, torque the bolts to 60 Nm + 90 deg (consult official repair manual for specific values).
  • Verify all bolts are tightened correctly.
View full procedure
Technical Service Bulletins

Driveshaft Bolt Loosening Issue

2009-05-15

Reported instances of driveshaft bolts loosening on 2006-2008 models due to improper initial torque application at the factory. This could lead to driveshaft vibration or failure.

2006-2008

Resolution: Inspect and retorque driveshaft bolts using the procedure outlined in the service manual. Verify bolts are not stretched. Consider using thread locking compound.

Front Differential Mounting Bolt Fatigue

2010-11-20

Reports have surfaced of front differential mounting bolts experiencing fatigue and stretching, particularly in vehicles subjected to aggressive driving or towing. This can cause clunking or vibrations.

2006-2011

Resolution: Inspect all front differential mounting bolts for signs of stretching or fatigue. Replace any damaged or suspect bolts. Retorque bolts as per the repair manual. Verify all bolts are not stretched.

Updated Transmission Mounting Bolt Torque Specification

2007-02-01

An updated torque specification for the transmission mounting bolts has been issued due to earlier specifications leading to potential loosening or damage. Always use the most current specification in the repair manual.

2006-2011

Resolution: Refer to the latest version of the service repair manual. The corrected torque value is 60Nm+90deg, be sure to replace bolts if any signs of stretching or damage are present.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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