Audi Audi Q5 2017-present Drivetrain Bolt Torque Specifications & Fastener Values
Audi Audi Q5 2017-present

Audi Audi Q5 2017-present Drivetrain Bolt Torque Specifications

This page provides detailed torque specifications for various bolts within the drivetrain system of the 2017-Present Audi Q5, including transmission, differential, and axle components.

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

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Torque Calculator

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Transmission

This section covers torque specifications for components related to the transmission, including mounting, fluid management, and internal components.

1

Transmission Mounting Bolts (to Engine Block)

M12 x 1.75
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Secures the transmission to the engine, essential for maintaining proper alignment and preventing vibration. Estimated value.
2

Transmission Mounting Bolts (to Subframe/Chassis)

M12 x 1.75
Important Notes
Secures the transmission to the chassis. Stretch bolts requiring additional angle tightening after reaching initial torque. Estimated value.
3

Transmission Drain Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Prevents leaks, ensuring correct transmission fluid level and pressure. Typically uses a new crush washer for sealing.
4

Transmission Fill Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Prevents leaks, maintaining the integrity of the transmission's seals. Typically uses a new crush washer.
5

Transmission Mechatronic Unit Bolts

M6 x 1.0
Torque Value
6 ft-lbs (8 N·m)
Important Notes
Secures the internal valve body of the transmission. Low torque required to prevent damage to delicate electronic components. Estimated value.
6

Output Shaft Flange Bolts

M10 x 1.5
Important Notes
Connects the transmission output to the driveshafts. May require stretch bolt procedures. Estimated value.

Transfer Case

This section details torque specs for the transfer case, a component specific to all-wheel-drive (Quattro) models, responsible for distributing power to the front and rear axles.

1

Transfer Case Mounting Bolts (to Transmission)

M12 x 1.75
Important Notes
Connects the transfer case to the transmission housing securely. Usually M12 stretch bolts requiring an additional angle after reaching initial torque. Estimated value.
2

Transfer Case Output Flange Bolts (Front Driveshaft)

M10 x 1.5
Important Notes
Connects the transfer case output to the front driveshaft. Usually M10, may require stretch bolt procedures. Estimated value.
3

Transfer Case Output Flange Bolts (Rear Driveshaft)

M10 x 1.5
Important Notes
Connects the transfer case output to the rear driveshaft. Usually M10, may require stretch bolt procedures. Estimated value.
4

Transfer Case Fill Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Prevents leaks and ensures proper fluid level. Typically uses a new crush washer.
5

Transfer Case Drain Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Prevents leaks and allows for fluid changes. Typically uses a new crush washer.

Driveshafts Axles

This section covers torque specs for driveshaft and axle components, critical for transmitting power from the transmission and transfer case to the wheels.

1

Driveshaft Bolts (Transmission Side)

M10 x 1.5
Important Notes
Connects the driveshaft to the transmission output flange. Usually M10 stretch bolts that need torque and angle tightening. Estimated value.
2

Driveshaft Bolts (Wheel Side)

M10 x 1.5
Important Notes
Connects the driveshaft to the wheel hub/bearing assembly. Usually M10 stretch bolts that need torque and angle tightening. Estimated value.
3

Center Support Bearing Bolts (Rear Driveshaft)

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the center support bearing of the driveshaft to the underbody of the vehicle. Estimated value.

Differential

This section covers torque specifications for the front and rear differentials, which allow the wheels to rotate at different speeds, especially during turns.

1

Differential Mounting Bolts (to Subframe/Chassis)

M12 x 1.75
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Secures the differential to the chassis, crucial for load bearing and driveline alignment. Estimated value.
2

Differential Cover Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the differential cover to the differential housing, important for preventing fluid leaks. Torque is critical for preventing warping or leaks. Estimated value.
3

Differential Fill Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Prevents leaks and allows for fluid level checks. Typically uses a new crush washer.
4

Differential Drain Plug

M18 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Prevents leaks and allows for fluid changes. Typically uses a new crush washer.
5

Ring Gear Bolts

M12 x 1.75
Important Notes
Secures the ring gear to the differential carrier. Often M12 stretch bolts. Estimated value.

Wheel Hub Bearing

This section covers torque specifications for components related to the wheel hub and bearing assembly, critical for wheel retention and safe vehicle operation.

1

Wheel Hub/Bearing Assembly Bolts (to Knuckle)

M14 x 1.5
Important Notes
Secures the wheel hub/bearing assembly to the steering knuckle or axle housing. Often large M14 stretch bolts with angle tightening. Estimated value.
2

Axle Nut/Bolt (Front)

M24 x 1.5
Important Notes
Secures the driveshaft to the wheel hub/bearing assembly. This is a critical, high-torque fastener that often requires a specific tightening procedure and a new bolt each time. Estimated value. **SAFETY CRITICAL FASTENER.**
3

Axle Nut/Bolt (Rear)

M24 x 1.5
Important Notes
Secures the driveshaft to the wheel hub/bearing assembly. This is a critical, high-torque fastener that often requires a specific tightening procedure and a new bolt each time. Estimated value. **SAFETY CRITICAL FASTENER.**

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 are correct torque specifications important for drivetrain bolts?

Correct torque ensures proper clamping force, preventing bolts from loosening due to vibration or stress during vehicle operation. Under-torquing can lead to joint failure, while over-torquing can stretch or break bolts, potentially causing severe damage to drivetrain components and even vehicle control loss. For example, improperly torqued driveshaft bolts can lead to vibration issues, joint failure, and even separation, which could be catastrophic.

Q2

What happens if I don't use a torque wrench?

Using a torque wrench is crucial. 'Eyeballing' tightness or using a regular wrench can lead to inconsistent torque application. This inconsistency can cause uneven wear on components, increase the risk of bolt failure, and may even cause damage to the threaded holes. For example, differential bolts tightened without a torque wrench can lead to casing leaks, uneven gear meshing, and premature wear.

Q3

Are torque specs different for new vs. used bolts?

In most cases, torque specifications are the same for new and used bolts, *provided* the used bolts are in good condition. However, it is highly recommended to replace bolts specified as 'torque-to-yield' (TTY) or 'stretch bolts' during removal. TTY bolts are designed to stretch when tightened to a specified torque and should be replaced as they might lose clamping force if reused. Reusing these can cause joint failure. Checking for any damage to threads and ensuring they are clean is a must. If used bolts are corroded or have damaged threads, they should not be reused.

Q4

What should I do if a bolt feels like it is not tightening properly?

If a bolt does not feel like it is tightening properly, it could indicate stripped threads or a damaged bolt. Stop tightening immediately. Attempting to force the bolt further can damage threads or the component. Inspect the bolt and the threaded hole for damage. If either are damaged, it must be addressed – either by replacing the bolt, repairing threads, or by replacing the component with the damaged threaded hole.

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 within the range specified for drivetrain components.

  • Click-type mechanism for accurate torque application
  • Reversible ratcheting head
  • Wide torque range (e.g., 20-200 ft-lbs)
Learn more

Torque Wrench (3/8" Drive)

A calibrated torque wrench capable of measuring torque values within the range specified for smaller drivetrain components.

  • Click-type mechanism for accurate torque application
  • Reversible ratcheting head
  • Wide torque range (e.g., 5-80 ft-lbs)
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets, including standard and deep sockets, suitable for various drivetrain bolts.

  • Variety of sizes from 8mm to 24mm or larger
  • 6-point and 12-point sockets
  • Durable construction
Learn more

Universal Joint (Swivel)

A universal joint to aid in reaching bolts in awkward locations.

  • Allows access to fasteners at an angle
  • Durable construction
  • Compatible with socket set
Learn more

Extension Bars (Various Lengths)

Extension bars of different lengths to help access fasteners in recessed locations.

  • 3"-12" lengths
  • Compatible with socket set
  • Durable construction
Learn more
Service Procedures

Front Axle Bolt Torque Procedure

Procedure for torquing the bolts securing the front axle components, including hub bolts and CV joint bolts.

  • Identify the specific bolts requiring torque adjustment based on the repair.
  • Clean bolt threads using wire brush and thread cleaning spray if necessary.
  • Apply correct torque value specified by manufacturer using a calibrated torque wrench, per a star tightening pattern.
  • Recheck all torque values after completing the initial torque procedure.
View full procedure

Rear Axle Bolt Torque Procedure

Procedure for torquing the bolts securing the rear axle components, including hub bolts and differential bolts.

  • Consult repair manual to identify the specific bolts and their torque specifications.
  • Clean bolt threads using wire brush and thread cleaning spray if necessary.
  • Tighten all bolts per manufacturer specified torque values, often in multiple stages and a star tightening pattern.
  • Verify all torque values after completing the torque procedure.
View full procedure

Driveshaft Bolt Torque Procedure

Procedure for torquing the bolts securing the driveshaft to the transmission and differential.

  • Identify all driveshaft fasteners and torque specifications.
  • Clean all bolt threads using wire brush and thread cleaning spray if necessary.
  • Apply correct torque value specified by manufacturer using a calibrated torque wrench.
  • Verify all torque values after completing the torque procedure.
View full procedure

Transmission Mount Bolt Torque Procedure

Procedure for torquing the bolts that hold the transmission mounts in place.

  • Identify all transmission mount bolts and their respective torque values.
  • Clean bolt threads using wire brush and thread cleaning spray if necessary.
  • Tighten all bolts to their specified torque values using a calibrated torque wrench
  • Verify torque value on all bolts.
View full procedure
Technical Service Bulletins

Updated Torque Specification for Rear Differential Bolts

2020-05-15

A revision to the torque specifications for the rear differential bolts was issued to address reported loosening issues. This bulletin provides the updated values.

2017-2019

Resolution: Replace affected bolts with new ones and torque to the revised specification: Replace bolts with torque-to-yield (TTY) bolts and use the updated torque spec (initial torque, then angle specification)

Driveshaft Bolt Loosening Issue

2021-11-20

Certain driveshaft bolts may loosen over time due to inadequate clamping force. This bulletin details a procedure for proper tightening and torque.

2018-2020

Resolution: Replace driveshaft bolts with new bolts and use the updated torque spec (initial torque, then angle specification).

Front CV Joint Bolt Torque Variation

2022-07-01

A clarification on the torque procedure for the front CV joint bolts has been released. Due to variations in bolt types a stepped torque procedure is specified.

2017-2022

Resolution: Use the specific torque sequence (stage 1, stage 2, final torque) for the specific CV joint bolt being installed.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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