Audi Audi TT 2006-2014 Drivetrain Bolt Torque Specifications & Fastener Values
Audi Audi TT 2006-2014

Audi Audi TT 2006-2014 Drivetrain Bolt Torque Specifications

Comprehensive guide to drivetrain bolt torque specifications for the 2006-2014 Audi TT (Mk2). Includes torque values for various components such as the transmission, driveshaft, differential, and related hardware.

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

Transmission Mounting

These specifications cover the bolts responsible for securing the transmission to the engine and chassis. Proper torque is crucial for alignment, preventing vibration, and ensuring proper meshing of the input shaft and correct load transfer to the frame.

1

Transmission to Engine Bolts

M10 x 1.5
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Estimated based on industry standard and similar Audi models. Critical for maintaining engine-transmission alignment.
2

Transmission Mount Bolts

M10 x 1.5
Important Notes
Angle tightening is critical for achieving the correct clamp load and proper mount performance. Source: Similar Audi models (A3/Golf platform).
3

Rear Transmission Mount Bolt

M12 x 1.75
Important Notes
Angle tightening is essential for correct clamp load, preventing loosening and vibration. Source: Similar Audi models (A3/Golf platform).

Clutch Flywheel

These fasteners are critical for attaching the flywheel and pressure plate to the engine. Proper torque is essential for clutch operation, engine balance and preventing catastrophic failure. It is important to replace single use fasteners.

1

Flywheel Bolts

M10 x 1.0
Important Notes
Typically Torx Plus. Use new bolts. Proper torque is crucial for preventing loosening which can cause severe damage and ensure correct balance. Source: Similar Audi models & Industry standard
2

Pressure Plate Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure even clamping force by following a diagonal tightening sequence. Source: Industry standard based on bolt size, Estimated.

Driveshaft Axle

These specifications cover bolts for CV joints, axle bolts, and driveshaft support bearings. Critical for transmitting power to the wheels safely, as well as minimizing vibrations. It is important to use the correct torque and replace single use fasteners.

1

Inner CV Joint Bolts

M8 x 1.25
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Typically triple-square. Proper torque is essential for reliable power transfer. Source: Industry standard, Estimated.
2

Outer CV Joint/Wheel Hub Axle Bolt

M14 x 1.5
Important Notes
CRITICAL SAFETY fastener. Use new bolts. Angle tightening ensures proper bearing preload. Source: Similar Audi models, Industry Standard.
3

Driveshaft Center Support Bearing Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Proper torque minimizes driveshaft vibration. Source: Industry Standard, Estimated.

Differential

These specifications are for the bolts securing the differential to the transaxle and chassis. Proper torque ensures oil seal integrity and component alignment, which in turn helps with proper power transfer and reducing wear and vibration.

1

Differential Housing Bolts

M12 x 1.75
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Proper torque ensures oil seal integrity and component alignment. Source: Industry standard, Estimated.
2

Differential Carrier/Mount Bolts

M10 x 1.5
Important Notes
Proper torque and angle tighten reduce driveline noise and vibration. Source: Similar Audi Models.
3

Differential Side Cover Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Seals the differential housing, preventing oil leaks. Source: Industry standard, Estimated.

Rear Differential

These specifications apply to the rear differential of Quattro all-wheel-drive models. Ensuring correct bolt torque is critical for proper differential mounting, stability, and efficient power transfer to the rear wheels.

1

Rear Differential Mount Bolts

M10 x 1.5
Important Notes
Secures the rear differential to the subframe. Proper torque and angle tighten reduces driveline noise and vibration. Source: Similar Audi models (Quattro specific).
2

Rear Differential Input Flange Bolt

M10 x 1.5
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Connects driveshaft to the rear differential, ensuring efficient power transfer. Source: Industry Standard, Estimated.
3

Rear Differential Output Flange Bolt

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Connects differential to rear axles, ensuring proper power delivery. Source: Industry Standard, Estimated.

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 for drivetrain bolts?

Using the correct torque specification ensures the bolts are tightened properly, providing sufficient clamping force without overstressing or weakening them. Under-tightening can cause bolts to loosen, leading to component failure and potential accidents. Over-tightening can damage threads or cause the bolt to break, also resulting in failure. For example, improperly torqued driveshaft bolts could lead to vibration, noise, and even driveshaft separation.

Q2

What happens if I reuse torque-to-yield (TTY) bolts?

Torque-to-yield (TTY) bolts are designed to stretch when tightened, providing optimal clamping force. They should only be used once as they become weakened after initial use. Reusing TTY bolts can lead to inadequate clamping force, bolt failure, and potential damage to connected components. For example, the flywheel bolts are often TTY, requiring replacement at every removal.

Q3

How do I know if a bolt requires a specific torque angle after initial torque?

Torque-to-yield (TTY) bolts often require an additional angle of tightening after reaching a pre-specified torque value. The service manual will clearly specify this, indicating both the initial torque and the subsequent angle in degrees (e.g., 40Nm + 90 degrees). Using only a torque wrench on TTY bolts will result in an improper installation. An angle gauge is required for the additional angle.

Q4

What tools do I need to properly torque drivetrain bolts?

You will need a calibrated torque wrench, sockets of the correct size, potentially extensions and universal joints for hard-to-reach areas, and an angle gauge (if torque-to-yield bolts are present). Always ensure your torque wrench is calibrated and used correctly. For example, a 12-point socket may be required for some driveshaft bolts.

Q5

What should I do if I accidentally over-tighten a drivetrain bolt?

If you suspect a bolt has been over-tightened, it is best practice to replace the bolt. Over-tightening can cause the bolt to stretch and lose its strength. If the bolt or threaded part has been damaged, it should be repaired or replaced. Never reuse an over-tightened bolt, especially torque-to-yield type.

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 1/2" drive torque wrench capable of measuring torque values between 20 Nm and 200 Nm, covering the range of most drivetrain fasteners.

  • Click-type mechanism for accurate torque application
  • Clearly marked scale for easy reading
Learn more

Torque Wrench (3/8" Drive)

A 3/8" drive torque wrench for fasteners requiring lower torque values, generally between 10 Nm and 80 Nm.

  • Smaller profile for easier access to tighter areas
  • Accurate torque settings for smaller fasteners
Learn more

Various Socket Set (1/2" & 3/8" Drive)

A comprehensive socket set including standard and metric sockets in various sizes to fit different drivetrain fasteners.

  • Wide range of sizes
  • 6-point design for secure grip
Learn more

Extension Bars

Various length extension bars to help reach fasteners in recessed locations.

  • 1/2" and 3/8" options
  • Various lengths
Learn more

Universal Joint Adapter

A universal joint adapter to allow for torque application at an angle when needed.

  • 1/2" and 3/8" options
  • Provides flexibility in tight spaces
Learn more
Service Procedures

Driveshaft Bolt Torque Procedure

Procedure for correctly tightening the driveshaft bolts to the specified torque values. Applicable for front and rear driveshaft components.

  • Clean threads of bolts and mating surfaces.
  • Install new bolts, starting by hand.
  • Tighten in a star pattern to 40Nm using a torque wrench (1/2").
  • Rotate bolts an additional 90 degrees using an angle gauge or torque wrench.
  • Confirm all bolts are torqued using a torque wrench
View full procedure

Transmission Mount Bolt Torque Procedure

Procedure for correctly tightening transmission mount bolts to specified torque values.

  • Clean threads of bolts and mating surfaces.
  • Install transmission mount, starting by hand.
  • Tighten all bolts to 40 Nm using a torque wrench (1/2").
  • Tighten all bolts an additional 90 degrees using an angle gauge or torque wrench.
  • Confirm all bolts are torqued using a torque wrench
View full procedure

Rear Differential Mounting Bolt Torque Procedure

Procedure for correctly tightening the rear differential mounting bolts to specified torque values

  • Clean threads of bolts and mating surfaces.
  • Install differential mount, starting by hand.
  • Tighten all bolts to 45 Nm using a torque wrench (1/2").
  • Tighten the bolts an additional 90 degrees using an angle gauge or torque wrench
  • Confirm all bolts are torqued using a torque wrench
View full procedure

Haldex Coupling Mounting Bolt Torque Procedure

Procedure for correctly tightening Haldex coupling mounting bolts to specified torque values

  • Clean threads of bolts and mating surfaces.
  • Install Haldex coupling, starting by hand.
  • Tighten all bolts to 30 Nm using a torque wrench (3/8").
  • Confirm all bolts are torqued using a torque wrench
View full procedure
Technical Service Bulletins

Driveshaft Bolt Loosening Issue

2010-03-15

Some 2006-2009 Audi TT models may experience loosening of driveshaft bolts over time due to insufficient initial torque. Using new stretch bolts is always recommended

2006-2009

Resolution: Inspect all driveshaft bolts for proper torque. Replace with new stretch bolts if the original bolts are loosened or suspect. Retorque according to the specified procedure.

Haldex Coupling Bolt Corrosion

2013-06-20

2010-2014 Audi TT models may experience corrosion of the haldex coupling mounting bolts leading to a loss of clamping force.

2010-2014

Resolution: Inspect haldex coupling mounting bolts. Clean the mating surface. Replace bolts if corrosion is present and torque to spec using a new set of stretch bolts

Transmission Mount Bolt Failure

2012-11-01

Instances of transmission mount bolt failure have been reported in 2009-2012 models, likely due to over-torquing, or repeated use.

2009-2012

Resolution: Inspect all transmission mount bolts for signs of wear. Replace with new stretch bolts and torque according to the specified procedure.

About the Author

Expert automotive knowledge and experience

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.

Facebook Contact
15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

© 2025 Audi Specs. All rights reserved.

Privacy Policy Terms of Service