Audi Audi RS4 2018-present DQ500 Transmission Transmission Torque Specifications & Bolt Torque Values
Audi Audi RS4 2018-present

Audi Audi RS4 2018-present DQ500 Transmission Torque Specifications

This page provides the torque specifications for bolts related to the DQ500 transmission used in the 2018-Present Audi RS4 (B9) model. Includes information on bellhousing bolts, pan bolts, and other critical fasteners.

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 main transmission case halves together. Proper torque is crucial for sealing and preventing distortion.

1

Main Case Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Estimated based on industry standard for M8 bolts in transmission housings. Tighten in a criss-cross pattern.

Mechatronic Unit

Bolts securing the Mechatronic unit to the transmission case. Over-tightening can damage the unit.

1

Mechatronic Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a specific sequence, typically from the center outwards. Estimated based on similar applications.

Transmission Mounts

Bolts securing the transmission to the vehicle's subframe and mount.

1

Transmission Mount Bolts (to Transmission Case)

M12 x 1.75
Important Notes
Angle tightening is required. Use new bolts. Estimated based on similar models.
2

Transmission Mount Bolts (to Subframe)

M12 x 1.75
Important Notes
Angle tightening is required. Use new bolts. Estimated based on similar models.

Fluid Plugs

Bolts for draining and filling transmission fluid, which require proper torque for sealing.

1

Transmission Drain Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Use a new crush washer. Estimated based on similar models.
2

Transmission Fill Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Use a new sealing washer. Estimated based on similar models.

Flywheel

Bolts connecting the transmission to the engine crankshaft. Critical for power transfer.

1

Flywheel/Drive Plate Bolts

M12 x 1.25
Important Notes
Angle tightening is required. Use new high-strength bolts. Estimated based on similar models and industry standards.

Input Shaft Housing

Bolts securing the input shaft housing. Proper torque prevents leaks and bearing misalignment.

1

Input Shaft Housing Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Estimated value, industry standard for M8 bolts. Tighten in a criss-cross pattern.

Differential Housing

Bolts securing the differential housing to the transmission case. Proper torque is critical for gear mesh.

1

Differential Housing Bolts

M10 x 1.5
Torque Value
26 ft-lbs (35 N·m)
Important Notes
Estimated value, industry standard for M10 bolts. Tighten in a criss-cross pattern.

Internal Clutch

Internal clutch pack bolts. These are generally not serviceable without factory procedures.

1

Internal Clutch Pack Bolts

N/A
Torque Value
0 ft-lbs (0 N·m)
Important Notes
These bolts are generally not designed to be serviceable and require specific factory procedures and tools. Reassembly procedures require new bolts and specialized procedures.

Oil Pump

Bolts securing the transmission's oil pump. Over-tightening can damage the pump housing.

1

Oil Pump Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Estimated value, similar application and bolt size. Tighten in a criss-cross pattern.

Oil Cooler Lines

Fittings connecting the transmission's oil cooler lines. Proper torque is essential to prevent leaks.

1

Oil Cooler Line Fittings (Transmission Side)

Varies (typically M14x1.5)
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Estimated value, industry standard for fluid fittings. Use appropriate new seals or crush washers.

Speed Sensors

Bolts securing the speed sensors to the transmission housing. Proper torque ensures accurate readings and prevents sensor damage.

1

Speed Sensor Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Estimated value, industry standard for M6 bolts in sensors.

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 it crucial to use the correct torque specifications on the DQ500 transmission?

Using the correct torque specifications for the DQ500 transmission bolts is crucial to ensure proper clamping force, preventing leaks, and maintaining the structural integrity of the transmission. Over-tightening can damage threads or components, while under-tightening can lead to loosening and potential failure. This is especially important in a high-performance vehicle like the RS4.

Q2

What happens if I over-torque a transmission bolt?

Over-torquing bolts on the DQ500 transmission can lead to several problems. It can stretch or break the bolt, strip the threads in the transmission housing, damage mating surfaces, and potentially cause internal component misalignment or failure. This can be costly to repair and require significant disassembly.

Q3

Can I re-use torque-to-yield bolts on the DQ500 transmission?

No, torque-to-yield (TTY) bolts on the DQ500 transmission *must not* be reused. These bolts are designed to stretch when torqued to their specification, and reusing them will compromise their clamping force and lead to potential failure. Always replace TTY bolts with new ones during reassembly.

Q4

Do I need to use a special torque wrench for these applications?

Yes, it is highly recommended to use a calibrated torque wrench when working on the DQ500 transmission. Using a non-calibrated wrench or relying on 'feel' can lead to improper tightening, which can cause leaks or damage. A torque wrench ensures accurate tightening to the specified values. A digital torque wrench is even more precise.

Q5

Are there any specific bolt tightening sequences I should follow when reassembling the DQ500?

Yes, following the correct tightening sequence is very important for the DQ500 transmission. Uneven tightening can cause distortions and leaks. Consult the repair manual for the specific tightening sequence for each component. Generally, a criss-cross pattern is recommended for evenly distributing the clamping force.

Q6

How often should I inspect the transmission bolts on my RS4?

While regular inspection of transmission bolts isn't typically part of standard maintenance, they should be inspected during major services or if any issues such as leaks or unusual noises are detected. If work is performed on the transmission, meticulous checks of all bolts are required prior to returning the vehicle to service.

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 with a 1/2" drive is essential for accurate bolt tightening to specified torques.

  • Calibrated for accuracy
  • Wide torque range (typically 20-200 Nm)
Learn more

Torque Wrench (3/8" drive)

A smaller calibrated torque wrench with a 3/8" drive is necessary for smaller bolts and accessing tight spaces.

  • Calibrated for accuracy
  • Suitable for lower torque ranges (typically 5-80 Nm)
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets (including hex and torx) in various sizes for different bolt heads on the DQ500 transmission.

  • Variety of sizes and types (hex, torx, standard)
  • Durable construction
Learn more

Extension Bars (Various lengths)

Extension bars provide extra reach when bolts are recessed or difficult to access.

  • Multiple lengths for versatility
  • Secure connection with sockets
Learn more

Universal Joint

A universal joint allows for torque application at an angle.

  • Flexibility to access angled fasteners
  • Durable construction
Learn more
Service Procedures

DQ500 Transmission Oil Pan Bolt Torque Procedure

This procedure outlines the steps to correctly tighten the bolts on the DQ500 transmission oil pan.

  • Clean the mating surfaces of the transmission case and oil pan.
  • Install a new oil pan gasket.
  • Install the oil pan and hand-tighten all bolts in a star pattern.
  • Using a 3/8" drive torque wrench, tighten the oil pan bolts to 10 Nm in a star pattern.
  • Verify each bolt is at the specified torque.
View full procedure

DQ500 Mechatronic Unit Bolt Torque Procedure

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

  • Clean the mating surfaces of the transmission and mechatronic unit.
  • Install a new gasket or seal if applicable.
  • Install the mechatronic unit and hand-tighten the bolts in a star pattern.
  • Using a 1/2" drive torque wrench, tighten the mechatronic unit bolts to 20 Nm + 90 degrees using the specified sequence.
  • Verify each bolt is torqued correctly.
View full procedure

DQ500 Transmission Mount Bolt Torque Procedure

This procedure describes the process for tightening the bolts securing the transmission mounts to the vehicle chassis and transmission.

  • Position the transmission mount and install the bolts.
  • Hand tighten all mounting bolts.
  • Using a 1/2" drive torque wrench, tighten the transmission-to-mount bolts to 60 Nm + 90 degrees
  • Using a 1/2" drive torque wrench, tighten the mount-to-chassis bolts to 70 Nm + 90 degrees.
  • Verify each bolt is torqued correctly.
View full procedure
Technical Service Bulletins

DQ500 Transmission Oil Leakage from Oil Pan

2020-03-15

Some cases of oil leakage from the DQ500 transmission oil pan have been reported. This issue can be resolved by ensuring the oil pan bolts are torqued to the correct specification.

2018-2020 RS4

Resolution: Replace the oil pan gasket and ensure the bolts are torqued to 10 Nm in a star pattern.

DQ500 Mechatronic Unit Bolt Loosening

2021-11-20

In some instances, bolts securing the mechatronic unit have been found to loosen over time, causing transmission issues. Proper torque procedure is essential to prevent this.

2018-2021 RS4

Resolution: Verify mechatronic unit bolts are torqued to 20 Nm + 90 degrees using the specified tightening sequence. Apply threadlocker if necessary.

DQ500 Transmission Mount Bolt Noise

2022-07-01

Reports of noises emanating from the transmission mount area have surfaced. Incorrect tightening of the mount bolts or reused hardware is the suspected cause.

2020-2022 RS4

Resolution: Ensure the transmission to mount bolts are torqued to 60 Nm + 90 degrees and the mount to chassis bolts to 70 Nm + 90 degrees. Always use new bolts if removed.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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