Audi Audi TT 2006-2014 DQ500 Transmission Transmission Torque Specifications & Bolt Torque Values
Audi Audi TT 2006-2014

Audi Audi TT 2006-2014 DQ500 Transmission Torque Specifications

This page provides detailed torque specifications for all bolts used in the DQ500 transmission found in the 2006-2014 Audi TT. Includes clutch housing, valve body, mechatronics, and case bolt torques.

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 Housing

Torque specifications for bolts securing the main transmission case and bellhousing.

1

Main Housing Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Even torque distribution is important to maintain the integrity of the transmission case and prevent oil leaks. Estimated value.
2

Bellhousing Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the transmission bellhousing to the engine block. Ensures proper alignment and prevents vibration and oil leaks.

Mechatronic Unit

Torque specifications for the mechatronic unit (valve body) and its related components.

1

Mechatronic Unit Bolts (Valve Body)

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Overtightening can damage the delicate valve body and create leaks. Proper tightening sequence is crucial. Estimated value.
2

Mechatronic Unit Connector Bolts

M4 x 0.7
Torque Value
4 ft-lbs (6 N·m)
Important Notes
Secures the electrical connectors on the mechatronic unit. Estimated value.

Oil System

Torque specifications for components related to the transmission oil system.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Over-tightening can distort the pan and gasket causing leaks. Use a new gasket during reassembly. Estimated value.
2

External Filter Housing Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Proper sealing is critical to avoid oil leaks. Estimated value.
3

Oil Pump Housing Bolts

M6 x 1.0
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Proper sealing is necessary to maintain adequate oil pressure. Estimated value.
4

Fill Plug

N/A
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Typically uses a sealing washer which should be replaced each time.
5

Drain Plug

N/A
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Typically uses a sealing washer which should be replaced each time.

Mounting And Drivetrain

Torque specifications for components related to mounting the transmission and connecting it to the drivetrain.

1

Transmission Mount Bolts (Transmission side)

M12 x 1.75
Important Notes
Often requires torque + angle tightening for optimal clamping force. Estimated bolt size.
2

Dual Clutch Unit Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Critical for proper clutch engagement and power transfer. Estimated value.
3

Flywheel/Drive Plate Bolts

M10 x 1.5
Important Notes
Always replace these bolts and use specified tightening sequence. Estimated bolt size.
4

Axle Flange Bolts

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Critical for power transfer to wheels.

Sensors And Controls

Torque specifications for bolts securing speed sensors and external control linkages.

1

Transmission Speed Sensor Bolts

M5 x 0.8
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Over-tightening can damage the sensors. Estimated bolt size.
2

Selector Shaft Retaining Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Estimated value.
3

Selector Lever Bolts (External)

M6 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Estimated 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 overtighten or undertighten the transmission bolts?

Overtightening can cause thread damage, bolt stretching, or even component fracture, leading to leaks, malfunctions, or catastrophic failure of the transmission. Undertightening can cause bolts to loosen over time due to vibration, resulting in leaks, component misalignment, and potential damage. Always use a calibrated torque wrench and follow specified torque values.

Q2

Do I need to use new bolts when reassembling the DQ500 transmission?

It is highly recommended to use new bolts, especially for critical fasteners like those on the Mechatronic unit and transmission housing. Many bolts are designed for single use, and they may stretch or weaken after being torqued once. Reusing old bolts can lead to improper clamping force and failure. Consult the vehicle's service manual for specific replacement recommendations.

Q3

Can I use thread locker on the DQ500 transmission bolts?

Generally, thread locker is not required for most DQ500 transmission bolts *unless* specifically specified by the manufacturer in the service manual. However, in certain situations, such as on bolts exposed to high vibration, a low-strength thread locker may be recommended. Applying thread locker where it isn't needed can result in incorrect torque readings and make disassembly more difficult. Always verify with the vehicle's service manual to know which bolts, if any, require thread locker.

Q4

What type of torque wrench should I use for working on the DQ500 transmission?

A high-quality, calibrated torque wrench is crucial. A click-type or a digital torque wrench is recommended. For most bolts, a 3/8-inch drive torque wrench covering the required range (e.g., 10Nm to 80Nm) should be sufficient. For higher torque fasteners (like the transmission mount), a 1/2-inch drive may be required. Ensure the torque wrench's calibration is up to date and within the manufacturer's recommendations. Consider using an angle-torque wrench adapter in conjunction with a standard torque wrench to achieve torque-plus-angle torque specifications.

Q5

What does 'Nm' mean in torque specifications?

Nm stands for Newton-meters, which is the standard unit of torque. It represents the rotational force applied to tighten a bolt or nut. For example, a torque specification of 25 Nm means that you need to apply a rotational force equivalent to 25 Newtons acting on a lever arm one meter long.

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

A calibrated torque wrench is essential for accurate tightening of transmission bolts to the specified torque values.

  • 1/2 inch drive
  • Wide torque range (e.g., 10-100 Nm)
Learn more

1/2 inch Drive Socket Set (Metric)

A comprehensive socket set with various metric sizes, including those specifically required for transmission bolts.

  • Includes sizes ranging from 8mm-24mm
  • Deep and shallow sockets
  • 6-point design for optimal grip
Learn more

Extension Bars

Extension bars are needed to access recessed bolts or bolts in hard-to-reach places on the transmission.

  • Varying lengths (e.g., 3, 6, 10 inch)
  • 1/2 inch drive
Learn more

Universal Joint

A universal joint allows for torque application at angles, especially useful for bolts with limited clearance.

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

Mechatronic Unit Bolt Torque Procedure

This procedure outlines the proper torquing sequence for the bolts securing the mechatronic unit to the DQ500 transmission.

  • Locate all mechatronic unit bolts.
  • Install all bolts finger-tight in their respective locations.
  • Using a torque wrench set to 8 Nm, tighten all bolts in a criss-cross pattern.
  • Increase torque wrench setting to 12 Nm, then torque all bolts in a criss-cross pattern.
  • Finally, tighten all bolts to 15 Nm in the same criss-cross pattern.
  • Double check each bolt with a torque wrench set to 15 Nm.
View full procedure

Transmission Housing Bolts Torque Procedure

This procedure outlines the proper torquing sequence for the bolts securing the transmission housing of the DQ500 transmission.

  • Locate all transmission housing bolts.
  • Install all bolts finger-tight in their respective locations.
  • Using a torque wrench set to 25 Nm, tighten all bolts in a criss-cross pattern.
  • Increase torque wrench setting to 45 Nm, then torque all bolts in a criss-cross pattern.
  • Finally, use a degree wrench or angle tool and torque all bolts an additional 90 degrees in the same criss-cross pattern.
  • Double check each bolt with a torque wrench set to 45 Nm, followed by another angle check
View full procedure

Drain and Fill Plug Torque Procedure

This procedure outlines the correct procedure for the drain and fill plugs.

  • Locate the drain and fill plugs.
  • Install the drain plug with a new gasket and tighten to 45 Nm
  • Install the fill plug with a new gasket and tighten to 30 Nm.
View full procedure
Technical Service Bulletins

DQ500 Mechatronic Unit Bolt Loosening

2010-05-15

Some DQ500 transmissions may exhibit mechatronic unit bolt loosening over time. This can lead to transmission malfunctions. Always replace bolts if the unit is removed.

2008-2012 Audi TT with DQ500

Resolution: Ensure bolts are replaced and properly torqued to the specification (15 Nm) and use thread-locking compound if necessary during reassembly.

Updated Torque Specifications for Transmission Housing Bolts

2013-11-20

There has been a slight modification to the torque process for the transmission housing bolts. Using an angle tool is now required.

2006-2014 Audi TT with DQ500

Resolution: Use the revised torque sequence of 25Nm + 45 Nm + 90 degrees for the transmission housing bolts.

Gasket Replacement for Drain and Fill Plugs

2011-02-20

Always replace the gasket for the drain and fill plugs. Failure to do so will lead to leaks.

2006-2014 Audi TT with DQ500

Resolution: Install new gaskets for the drain and fill plugs and torque plugs to 45 Nm and 30 Nm respectively

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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