Audi Audi RS3 2017-present DQ500 Transmission Transmission Torque Specifications & Bolt Torque Values
Audi Audi RS3 2017-present

Audi Audi RS3 2017-present DQ500 Transmission Torque Specifications

Comprehensive torque specifications for all bolts associated with the DQ500 transmission used in the 2017-Present Audi RS3 (8V and 8Y chassis). Includes bellhousing, mechatronics, pan, and external component 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

Bolts securing the transmission case halves, bell housing, and mounts.

1

Transmission Housing Bolts (Case Halves)

M12 x 1.75
Important Notes
These are torque-to-yield bolts. Replace if removed. Use a criss-cross pattern.
2

Bell Housing Bolts (Engine to Transmission)

M12 x 1.75
Torque Value
48 ft-lbs (65 N·m)
Important Notes
Ensure proper alignment before tightening.
3

Transmission Mount Bolts (To Body)

M10 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Use new bolts if specified by service manual.
4

Transmission Mount Bolts (To Transmission)

M10 x 1.5
Torque Value
29.5 ft-lbs (40 N·m)
Important Notes
Ensure mount is correctly aligned.

Mechatronic Unit

Bolts associated with mounting and securing the mechatronic unit and its components.

1

Mechatronic Unit Mounting Bolts (To Transmission Case)

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Do not overtighten. Use a calibrated torque wrench.
2

Mechatronic Unit Valve Body Bolts

M5 x 0.8
Torque Value
0.59 ft-lbs (8 N·m)
Important Notes
Estimated value. Use a low-range torque wrench. Tighten evenly.
3

Mechatronic Unit Connector Bolts

M4 x 0.7
Torque Value
0.17 ft-lbs (2.5 N·m)
Important Notes
Estimated value. Extremely low torque; use caution.

Differential Final Drive

Bolts related to the differential, ring gear, and drive flanges.

1

Differential Cover Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Use a new gasket or sealant, as specified.
2

Differential Ring Gear Bolts (To Differential Carrier)

M10 x 1.5
Important Notes
Estimated value. Torque-to-yield bolts; replace if removed.
3

Drive Flange Bolts (To Driveshaft)

M10 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Ensure proper alignment of drive shaft to flange.

Clutch Assembly

Bolts securing the dual clutch assembly

1

Dual Clutch Assembly Bolts

M8 x 1.25
Important Notes
Estimated value. Use a calibrated angle gauge. Tighten in a circular pattern.

Oil Pan Filter

Bolts securing the oil pan and filter housing.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Use a new gasket or sealant. Do not overtighten.
2

Transmission Oil Filter Housing Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Use a new O-ring or gasket.

Sensors

Bolts related to mounting sensors on the transmission.

1

Transmission Speed Sensor Bolts

M5 x 0.8
Torque Value
0.59 ft-lbs (8 N·m)
Important Notes
Estimated value. Do not overtighten. Use caution when working near sensors.
2

Temperature Sensor Bolts

M5 x 0.8
Torque Value
0.59 ft-lbs (8 N·m)
Important Notes
Estimated value. Use a low-range torque wrench.

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 the transmission bolts?

Overtightening bolts can lead to several issues, including stripped threads in the transmission case, bolt shearing, and uneven clamping force. This can damage the transmission housing, leading to fluid leaks, misalignment, and potentially requiring costly repairs or replacement of the transmission case itself. Always use a calibrated torque wrench and follow the specified torque values.

Q2

What happens if I undertighten the transmission bolts?

Undertightening bolts can result in insufficient clamping force, which may lead to components shifting, causing vibrations, leaks, and potentially complete bolt failure during operation. This could cause significant damage to the transmission and potentially other driveline components. This can be more dangerous than overtightening as it can cause bolts to come loose, creating a safety risk while driving.

Q3

Do I need to replace the transmission bolts every time they are removed?

While not always mandatory, it's highly recommended to replace torque-to-yield bolts, especially critical ones like those on the transmission, as they stretch when tightened. Reusing them can cause incorrect clamping force and may lead to failure. These bolts should be properly discarded after a single use. Always consult your service manual for specific instructions.

Q4

Can I use threadlocker on transmission bolts?

Generally, threadlocker is not required on most transmission bolts as they are designed for proper clamping force at specific torque levels. However, if the manufacturer specifies using threadlocker on certain bolts, then you should use the recommended type and quantity. Always follow the service manual guidelines. Applying threadlocker improperly may lead to an incorrect torque application or material issues.

Q5

How often should I check the transmission bolt torque?

Generally, checking the torque of transmission bolts isn't a routine maintenance task unless you have been performing repair work on the transmission or surrounding area. If you have performed repairs or replaced the transmission, it's a good idea to check them a few times within the first several hundred miles to ensure proper torque is maintained. Refer to the factory service schedule for regular inspection guidance.

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 capable of measuring torque values between 10 Nm and 100 Nm, suitable for larger bolts.

  • Click-type mechanism for accurate torque application
  • Reversible ratchet head
  • Clear torque scale for easy reading
Learn more

Torque Wrench (3/8" Drive)

A calibrated torque wrench capable of measuring torque values between 5 Nm and 50 Nm, suitable for smaller bolts.

  • Click-type mechanism for accurate torque application
  • Reversible ratchet head
  • Clear torque scale for easy reading
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets, including sizes commonly used on the DQ500 transmission.

  • Variety of sizes including 8mm, 10mm, 13mm, 16mm, 18mm, and 21mm
  • 6-point design for optimal grip
  • Durable construction for long-lasting use
Learn more

Extension Bars

Various length extensions to access hard to reach bolts.

  • 3/8" and 1/2" drive sizes
  • Allows access to recessed areas
  • Durable construction for long-lasting use
Learn more

Triple Square Bit Set

Set of triple square bits, including M8, M10, and M12 sizes commonly used on Audi Transmissions.

  • Specifically used for transmission bolts
  • High-strength steel construction
  • Variety of sizes for full coverage
Learn more
Service Procedures

Mechatronics Unit Bolt Torque Procedure

Procedure for tightening the bolts securing the Mechatronics Unit to the DQ500 transmission housing.

  • Ensure the transmission fluid is at the correct level.
  • Loosen all bolts slightly before tightening.
  • Tighten the bolts in a cross pattern to the specified torque of 8 Nm + 90 degrees.
  • Always use new bolts
View full procedure

Transmission Housing Bolt Torque Procedure

Procedure for tightening the bolts that hold the transmission case together.

  • Clean all mating surfaces of debris and old sealant
  • Apply new transmission sealant if required
  • Start all bolts by hand to avoid cross threading
  • Tighten bolts to specified torque of 45 Nm + 90 degrees.
  • Always use new bolts.
View full procedure

Transmission Mount Bolt Torque Procedure

Procedure for tightening the bolts that secure the transmission mount.

  • Start all bolts by hand to avoid cross threading
  • Tighten transmission bracket bolts to 40 Nm + 90 degrees.
  • Tighten transmission mount bolts to 70 Nm + 90 degrees.
  • Always use new bolts.
View full procedure
Technical Service Bulletins

DQ500 Mechatronic Unit Bolt Re-Torque Procedure

2020-07-15

Some instances of mechatronics bolt failures have been reported. This bulletin outlines a new torque procedure.

2017-2019 Audi RS3

Resolution: Re-torque mechatronics unit bolts to 8 Nm + 90 degrees using new bolts, and replace any damaged hardware.

DQ500 Transmission Housing Bolt Fatigue

2022-02-20

Some cases of transmission housing bolts cracking or shearing have been reported. This bulletin outlines proper procedure.

2017-2022 Audi RS3

Resolution: Inspect transmission housing bolts for fatigue or damage. Replace bolts and retorque to 45 Nm + 90 degrees.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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