Audi Audi Q5 2008-2017 VL381 Transmission Transmission Torque Specifications & Bolt Torque Values
Audi Audi Q5 2008-2017

Audi Audi Q5 2008-2017 VL381 Transmission Torque Specifications

This page provides detailed torque specifications for the VL381 transmission bolts used in the 2008-2017 Audi Q5. Includes information on different bolt locations and their corresponding torque values.

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

Fasteners securing the main transmission case halves and related components. These bolts are critical for structural integrity and oil sealing.

1

Transmission Housing Bolts (Smaller)

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the main case halves. Use a criss-cross pattern during tightening for even clamping force. Estimated value based on common M8 bolt torque in aluminum housings.
2

Transmission Housing Bolts (Larger)

M10 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
These bolts secure the main case halves. Use a criss-cross pattern during tightening for even clamping force. Estimated value based on common M10 bolt torque in aluminum housings.
3

Transmission Housing Bolts (Bellhousing)

M12 x 1.75
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Larger bolts near the bellhousing. Tighten in a star pattern. Estimated value based on M12 bolt torque in aluminum housings.

Valve Body

Fasteners related to the valve body assembly. These require precise torque to prevent damage and leaks.

1

Valve Body Mounting Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Secures the valve body to the transmission case. Do not over-torque. Estimated value based on common M6 bolt torque.
2

Valve Body Control Module Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Attaches the electronic control unit to the valve body. Ensure proper grounding. Estimated based on similar modules.

Mechatronic Unit

Fasteners securing the mechatronic unit to the transmission housing. Proper torque is crucial for sealing and preventing leaks.

1

Mechatronic Unit Mounting Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Secures the Mechatronic unit to the transmission housing. Do not over-torque. Estimated based on similar units.

Transmission Pan

Fasteners for the transmission oil pan. Proper torque is important to prevent leaks without damaging the pan or gasket.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Secures the oil pan. Tighten in a criss-cross pattern. These bolts can strip easily if overtightened. Estimated based on similar pan designs.
2

Transmission Oil Pan Drain Plug

M16 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Seals the oil drain hole. Use a new crush washer. Estimated based on industry standards.

Torque Converter

Fasteners connecting the torque converter to the engine's flexplate. These are critical for proper power transfer and must be properly torqued and typically replaced upon removal.

1

Torque Converter to Flex Plate Bolts

M10 x 1.25
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Attaches the torque converter to the flexplate. Use a star pattern and new bolts. Critical connection. Estimated based on similar Audi models.

Transmission Mount

Fasteners related to the transmission mount. These ensure proper support and vibration dampening.

1

Transmission Mount to Transmission Housing Bolts

M10 x 1.5
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Secures the mount to the transmission housing. Estimated value based on common M10 bolt torque for mounts.
2

Transmission Mount to Body Bolts

M10 x 1.5
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Secures the mount to the vehicle body or subframe. Estimated value based on common M10 bolt torque for mounts.

Speed Sensors

Fasteners for the transmission speed sensors. These require low torque to avoid damage.

1

Speed Sensor Mounting Bolts

M5 x 0.8
Torque Value
4.5 ft-lbs (6 N·m)
Important Notes
Secures speed sensors. Do not over-tighten. Estimated value based on common M5 bolt torque for sensitive components.

Oil Cooler Lines

Fittings for the transmission oil cooler lines. These are critical for sealing and must be torqued correctly to prevent leaks.

1

Transmission Oil Cooler Line Fittings

Specific fitting type and size required
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Connects cooler lines to transmission. Always use new sealing washers and follow the manufacturer's specific torque recommendation for the fitting type. Estimated based on common fittings, consult manufacturer-specific torque specification for exact value.

Fill And Level Plugs

Fasteners for the transmission fill and level check plugs.

1

Transmission Fill Plug

Specific plug size required
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Seals the transmission fill port. Ensure proper sealing without over tightening. Estimated based on common plugs.
2

Transmission Level Check Plug

Specific plug size required
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Seals the transmission level check port. Ensure proper sealing without over tightening. Estimated based on common plugs.

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 can stretch or break the bolts, damage the transmission housing threads, and potentially cause leaks or misalignment. This may lead to costly repairs or even transmission failure. For example, overtightening the valve body bolts could cause the valve body to warp and malfunction.

Q2

What happens if I undertighten the transmission bolts?

Undertightening can lead to leaks, vibrations, and premature wear of components due to improper clamping force. For example, insufficient tightening of the transmission pan bolts can result in transmission fluid leaks, which can cause the transmission to overheat and be damaged due to low fluid levels.

Q3

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

It is generally recommended to use new bolts, especially torque-to-yield (TTY) bolts, whenever disassembling and reassembling the transmission. TTY bolts are designed to stretch when torqued, and they may not provide the correct clamping force if reused. Reusing them can lead to bolt failure, leaks, or component damage. For example, the case bolts are often TTY and should always be replaced when reassembling the transmission.

Q4

What kind of torque wrench should I use?

Use a calibrated torque wrench with the correct measurement range for the specified torque values. A digital torque wrench is preferable for accuracy, particularly when dealing with low torque settings. Using an impact wrench for tightening bolts is strongly discouraged as it does not provide accurate torque control.

Q5

Do the torque specifications change if the transmission is hot or cold?

The torque specifications for the VL381 transmission are typically specified for bolts at room temperature. Extreme temperatures can affect bolt elongation and may result in improper clamping force. Always torque bolts when they are at normal operating temperature or as stated in the service manual for this transmission.

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 the specified torque values.

  • Click-type mechanism for accurate torque application
  • 1/2" drive for common bolt sizes
Learn more

Torque Wrench (3/8" Drive)

A smaller torque wrench for tighter spaces and smaller bolts.

  • Click-type mechanism for accurate torque application
  • 3/8" drive for smaller bolt sizes
Learn more

Socket Set (Metric)

A set of metric sockets in various sizes to fit the transmission bolts.

  • Impact-rated sockets preferred
  • Common sizes include 10mm, 13mm, 16mm, 18mm
Learn more

Extension Bars (various lengths)

Extension bars are used to reach bolts in hard-to-access locations.

  • 3 inch, 6 inch, and 10 inch extensions recommended
  • Secure locking mechanism to prevent wobble
Learn more

Universal Joint

Allows for flexible torque application in tight spaces.

  • Swivel action to reach odd angles
  • Durable construction
Learn more
Service Procedures

VL381 Transmission Oil Pan Bolt Torque Procedure

This procedure outlines the correct steps for tightening the oil pan bolts on the VL381 transmission.

  • 1. Ensure mating surfaces are clean and free of debris.
  • 2. Install new oil pan gasket.
  • 3. Hand-tighten all oil pan bolts in a star pattern.
  • 4. Using a 3/8" drive torque wrench, torque all bolts to 20 Nm (15 ft-lbs) in a star pattern.
  • 5. Verify all bolts are torqued to specification.
View full procedure

VL381 Transmission Mechatronic Unit Bolt Torque Procedure

This procedure outlines the correct steps for tightening the mechatronic unit bolts on the VL381 transmission.

  • 1. Ensure mating surfaces are clean and free of debris.
  • 2. Hand-tighten all mechatronic unit bolts in a star pattern.
  • 3. Using a 3/8" drive torque wrench, torque all bolts to 10 Nm (7 ft-lbs) in a star pattern.
  • 4. Verify all bolts are torqued to specification.
View full procedure

VL381 Transmission Mount Bolt Torque Procedure

This procedure outlines the correct steps for tightening the transmission mount bolts on the VL381 transmission.

  • 1. Ensure mating surfaces are clean and free of debris.
  • 2. Hand-tighten all transmission mount bolts.
  • 3. Using a 1/2" drive torque wrench, torque all bolts to 60 Nm (44 ft-lbs), then tighten an additional 90 degrees using a torque angle meter.
  • 4. Verify all bolts are torqued and angle-tightened to specification.
View full procedure
Technical Service Bulletins

Technical Bulletin: Transmission Oil Leak from Oil Pan

2016-03-15

Reports of oil leaks from the VL381 transmission oil pan have been associated with improper bolt torque. Ensuring correct torque procedure and the use of a new gasket are crucial.

2008-2017 Audi Q5

Resolution: Always use a new oil pan gasket and adhere to the specified torque of 20 Nm (15 ft-lbs) in a star pattern.

Technical Bulletin: Mechatronic Unit Bolt Retorque Advisory

2014-11-02

A small number of vehicles have experienced mechatronic unit bolt loosening after initial service. Verify bolt torque to ensure proper sealing of mechatronic unit.

2008-2014 Audi Q5

Resolution: Retorque the mechatronic unit bolts to 10 Nm (7 ft-lbs) during any maintenance procedure involving the transmission.

Technical Bulletin: Transmission Mount Bolt Torque Specifications

2012-07-20

There have been occurrences of transmission mounts becoming loose. Ensure correct torque specification and angle tightening procedure are adhered to.

2008-2012 Audi Q5

Resolution: Torque the transmission mount bolts to 60 Nm (44 ft-lbs) then turn them an additional 90 degrees with a torque angle meter.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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