Audi Audi TTS 2015-present DQ250 Transmission Transmission Torque Specifications & Bolt Torque Values
Audi Audi TTS 2015-present

Audi Audi TTS 2015-present DQ250 Transmission Torque Specifications

Detailed torque specifications for the bolts used in the DQ250 transmission found in the 2015-Present Audi TTS (Mk3). Includes values for various housing and component 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

Transmission Mounting

Fasteners related to mounting the transmission to the engine block and the subframe.

1

Engine Side Mounting Bolts

M12 x 1.5
Important Notes
Angle torque is required after initial torque. Ensure proper thread engagement. Lubricate bolts with engine oil prior to installation.
2

Subframe Side Mounting Bolts

M12 x 1.5
Important Notes
Angle torque is required after initial torque. Ensure proper thread engagement. Lubricate bolts with engine oil prior to installation.

Transmission Case

Fasteners related to the main transmission case, including the oil pan, drain, and fill plugs.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Use a cross-pattern sequence. Avoid over-tightening to prevent oil pan distortion or leaks.
2

Transmission Oil Drain Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Use a new sealing washer. Do not over-tighten.
3

Transmission Oil Fill Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Use a new sealing washer. Do not over-tighten.

Mechatronics

Fasteners related to securing the mechatronic unit (valve body).

1

Mechatronic Unit Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Use a cross-pattern sequence. Avoid over-tightening to prevent damage to the electronic components. This is a delicate component.

Clutch Module

Fasteners related to securing the dual clutch module within the transmission.

1

Dual Clutch Module Bolts

M8 x 1.25
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Ensure proper alignment and even clamping force. These are high-stress bolts.

Shaft Flanges

Fasteners related to securing the driveshaft flanges to the input and output shafts.

1

Input Shaft Flange Bolt/Nut

M12 x 1.5
Important Notes
Angle torque is required after initial torque. This is a critical fastener for proper torque transfer.
2

Output Shaft Flange Bolt/Nut

M12 x 1.5
Important Notes
Angle torque is required after initial torque. This is a critical fastener for proper torque transfer.

Cooling System

Fasteners related to the transmission oil cooler lines.

1

Cooler Line Fittings

M12 x 1.5
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Do not over-tighten. Ensure proper alignment of lines to prevent leaks.

External Components

Fasteners related to securing external components to the transmission housing.

1

Starter Mounting Bolts

M10 x 1.5
Torque Value
25 ft-lbs (35 N·m)
Important Notes
Ensure proper alignment of starter. Do not over tighten
2

Reverse Light Switch

M10 x 1.0
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure proper seating without damaging threads.

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 for my DQ250 transmission?

Using the correct torque specification is critical to ensure proper clamping force and prevent issues like bolt loosening, component failure, and fluid leaks. Over-torquing can damage threads or the transmission case, while under-torquing can lead to joint separation and catastrophic failure. For example, failing to properly torque the mechatronics unit bolts can lead to leaks and shifting problems.

Q2

What happens if I over-torque a bolt on my DQ250 transmission?

Over-torquing can cause several problems. It can stretch and weaken the bolt itself, potentially leading to failure. It can also damage the threads in the transmission case, rendering the component unusable without costly repairs. Additionally, over-torquing can deform components, causing leaks or misalignment issues. An example is over-torquing a pan bolt, leading to stripped threads and a leaking seal.

Q3

Can I use threadlocker on DQ250 transmission bolts?

Generally, yes, but refer to the specific repair manual for your model. Some bolts, particularly those in high-stress areas like the mechatronic unit, may require threadlocker (typically medium strength, such as Loctite 243) to prevent loosening due to vibration. It's crucial to use the correct grade and follow the application instructions. An example would be using a threadlocker on the valve body bolts, especially on a stage 2 or higher build where the transaxle is experiencing more stress.

Q4

Do torque specifications vary for different parts of the DQ250 transmission?

Yes, torque specifications vary significantly depending on the specific bolt and component. The transmission pan bolts will have a much lower torque specification than the mechatronics unit bolts. The correct torque values are listed in the Audi repair manual or equivalent service documentation. Using the incorrect torque on even slightly different looking bolts could result in damage. For instance, the clutch pack cover bolts require a completely different torque specification than the differential bolts.

Q5

How often should I check the torque on my transmission bolts?

Unless specified by your service manual, routine torque checks on transmission bolts are not typically required during regular maintenance intervals. However, after any service that involves removing and reinstalling bolts, or after experiencing unusual noises/vibrations, rechecking the torque to spec is recommended to ensure proper function. If you have a performance build or your vehicle is tracked or raced, more frequent checks may be needed.

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 accurately tightening bolts to specification, ensuring proper clamping force and preventing damage.

  • Accurate torque measurement
  • Wide torque range
  • Click-type or digital display
Learn more

Torque Wrench (3/8" Drive)

A smaller torque wrench is ideal for smaller bolts and hard-to-reach places, ensuring accuracy where space is limited.

  • Accurate torque measurement
  • Compact design
  • Click-type or digital display
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is necessary to fit the various bolt heads on the DQ250 transmission.

  • Various sizes from 8mm to 19mm
  • 6-point and 12-point options
  • Deep and shallow sockets
Learn more

Extension Bars (Various lengths)

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

  • Multiple length options
  • Durable construction
  • Secure fit
Learn more

Universal Joint

A universal joint allows sockets to reach bolts at an angle, which is useful around obstructions.

  • Full range of motion
  • Durable construction
  • Secure fit
Learn more

Triple Square Bit Set (Metric)

Triple square bits are essential for several bolts on the DQ250, and using the correct bit is critical to prevent damage.

  • Sizes from M6 to M12
  • High strength construction
  • Precision fit
Learn more
Service Procedures

Mechatronic Unit Bolt Torque Procedure

Procedure for tightening the bolts that secure the mechatronic unit to the DQ250 transmission housing. Requires specific sequence and torque values.

  • Locate all mechatronic unit bolts.
  • Tighten bolts to the first stage torque in the correct sequence.
  • Tighten bolts to the final torque stage in the correct sequence.
  • Verify all bolts are torqued to specification.
View full procedure

Transmission Housing Bolt Torque Procedure

Procedure for tightening the bolts that secure the transmission housing components. Requires specific sequence and torque values for correct sealing and operation.

  • Locate all transmission housing bolts.
  • Tighten bolts to the first stage torque in the correct sequence.
  • Tighten bolts to the final torque stage in the correct sequence.
  • Verify all bolts are torqued to specification.
View full procedure

Oil Pan Bolt Torque Procedure

Procedure for tightening the bolts that secure the oil pan to the transmission case. Requires a specific sequence and torque value.

  • Locate all oil pan bolts.
  • Tighten bolts to the first stage torque in the correct sequence.
  • Tighten bolts to the final torque stage in the correct sequence.
  • Verify all bolts are torqued to specification.
View full procedure
Technical Service Bulletins

DQ250 Mechatronic Unit Bolt Loosening

2017-03-15

Some early DQ250 transmissions have experienced mechatronic unit bolt loosening due to improper initial torque during assembly or thermal cycling. This can lead to shift issues and transmission damage.

2015-2016 Audi TTS (and other VW Group Vehicles with the DQ250)

Resolution: Inspect and retorque the mechatronic unit bolts to the specified torque sequence and values using a calibrated torque wrench and the correct triple square bit. Use a fresh set of bolts as specified.

DQ250 Housing Bolt Corrosion Issues

2019-09-20

Reports of corrosion around the transmission housing bolt areas have been noted. This can cause bolt loosening over time.

2015-2019 Audi TTS (and other VW Group Vehicles with the DQ250)

Resolution: Inspect all housing bolt areas for corrosion. If corrosion is found, clean and use new bolts and the recommended anti-corrosion compound. Retorque bolts as specified.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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