Audi Audi A5 2016-present DL382 Transmission Transmission Torque Specifications & Bolt Torque Values
Audi Audi A5 2016-present

Audi Audi A5 2016-present DL382 Transmission Torque Specifications

Detailed torque specifications for all bolts associated with the DL382 transmission found in the 2016-Present Audi A5 (B9) platform. Includes transmission pan, valve body, and housing 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

Dl382-transmission Mounting

Torque specifications for mounting the DL382 transmission to the engine and chassis.

1

Transmission Mounting Bolts

M12 x 1.75
Torque Value
37 ft-lbs (50 N·m)
Important Notes
These are high strength bolts. Ensure proper tightening sequence is followed to avoid stress on the transmission and engine block.
2

Transmission Bellhousing Bolts to Engine Block

M12 x 1.75
Important Notes
These are high strength bolts that often require a final angle torque. Always refer to factory service manual for final angle specification.

Dl382-transmission Case

Torque specifications for components directly attached to the transmission case.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten to specified torque to prevent oil leaks and pan distortion. Use new gasket and sealant. Torque in a criss-cross pattern.
2

Differential Housing to Transmission Case Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
These are high strength bolts. Ensure proper tightening sequence is followed to avoid stress on the differential housing and transmission case.
3

Mechatronic Unit Mounting Bolts

M6 x 1.0
Important Notes
These bolts require a specific torque and angle procedure. Refer to the factory service manual for the final angle specification.
4

Clutch Actuator Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Torque to spec to ensure the clutch actuator is securely mounted.
5

Input Shaft Support Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the bolts are torqued evenly to secure the input shaft support.
6

Output Shaft Support Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure even torque to properly support the output shaft.

Dl382-transmission Valve Body

Torque specifications for the valve body within the DL382 transmission.

1

Valve Body Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Proper torque is critical for the valve body to function correctly and prevent leaks. Torque in a criss-cross pattern.

Dl382-transmission External Components

Torque specifications for components external to the transmission case.

1

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
These bolts are responsible for connecting the drive axles to the transmission. Proper torque ensures secure power transfer.
2

Transmission Cooler Line Fittings

M16 x 1.5
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Tighten to spec to avoid fluid leaks. Overtightening may cause damage to the fittings.
3

Transmission Fluid Drain/Fill Plug

M18 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Estimated value based on typical drain plugs. Always refer to manufacturer's specifications for specific torque values. Use new crush washer.

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 on the DL382 transmission can cause several issues. Primarily, it can lead to bolt stretching or shearing, which compromises their clamping force and can result in leaks, component misalignment, or even damage to the transmission housing. This can be a significant repair and a costly job. For example, overtightening the valve body bolts could cause its housing to crack, requiring replacement.

Q2

What happens if I undertighten the transmission bolts?

Undertightening transmission bolts is equally problematic. Insufficient torque will prevent proper clamping force, leading to leaks (especially around the pan or sealing surfaces), vibrations, and potential component movement. This can cause accelerated wear on the components and eventual failure. For instance, an under-torqued transmission pan will likely leak fluid, which can damage internal components and the parking brake. The car would eventually not be drivable.

Q3

Why are torque specifications so critical for the DL382 transmission?

Torque specifications are essential because the DL382 transmission is a complex system with tightly fitted components. The clamping force provided by each bolt is engineered to ensure proper operation, fluid sealing, and structural integrity. Deviating from these specifications can disrupt this balance. For instance, the bolts holding the Mechatronics unit need to be correctly torqued to prevent oil leaks from the hydraulic circuits, and the correct torque ensures consistent internal pressure.

Q4

Should I use threadlocker on the DL382 transmission bolts?

While most bolts on the DL382 transmission do not require threadlocker, it's always best to refer to the specific repair manual for your particular Audi A5 model year. Some fasteners, particularly those subject to vibration or potential loosening (like certain fill and drain plugs), might have a specific application requirement. Usually, if factory bolts have threadlocker on them, this needs to be replicated. Reusing old bolts with threadlocker is not advised.

Q5

Can I reuse old bolts?

It's generally advised against reusing bolts, especially torque-to-yield (TTY) bolts, as found in some areas of the DL382 transmission. TTY bolts are designed to stretch slightly upon tightening, achieving precise clamping force. Reusing these bolts can lead to incorrect torque and clamping force, or even bolt failure. Always replace them with new bolts with the same specification as your car's OEM bolts. These bolts are critical to the longevity and maintenance of the transmission. It's always recommended to use new bolts.

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 inch Drive)

A high-quality torque wrench is essential for accurately tightening bolts to specification. A 1/2 inch drive is recommended for the typical torque range of DL382 transmission bolts.

  • Precise torque settings
  • Audible click when torque is reached
  • Reversible ratcheting head
Learn more

Torque Wrench (3/8 inch Drive)

A 3/8 inch drive torque wrench is helpful for smaller bolts and tight spaces often encountered around the transmission.

  • Precise torque settings
  • Audible click when torque is reached
  • Reversible ratcheting head
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is necessary for accessing all the various bolt heads on the DL382 transmission. Standard and deep sockets should be included.

  • Various sizes for different bolts
  • Durable construction
  • 6-point design for secure grip
Learn more

Extension Bars

Various length extension bars will help you access deeply recessed fasteners.

  • Multiple lengths available
  • Durable construction
Learn more

Universal Joint/Swivel Adapter

A universal joint will be needed to access fasteners at odd angles.

  • Allows access at angles
  • Durable construction
Learn more

Threadlocker (Medium Strength)

Medium-strength threadlocker (e.g., Loctite 243) may be required for certain bolts to prevent loosening due to vibration.

  • Prevents bolts from loosening
  • Medium strength allows for disassembly
Learn more
Service Procedures

DL382 Transmission Oil Pan Bolt Torque

Procedure for torquing the bolts on the DL382 transmission oil pan. Always use new bolts as they are one-time use only.

  • Clean all mating surfaces of the transmission case and oil pan.
  • Install new oil pan gasket.
  • Install oil pan with new bolts.
  • Torque oil pan bolts to 10 Nm + 90 degrees
View full procedure

DL382 Transmission Mechatronics Unit Bolt Torque

Procedure for tightening the bolts securing the Mechatronics unit to the transmission housing. Always use new bolts as they are one-time use only.

  • Install the Mechatronics unit with new bolts.
  • Tighten the bolts in a criss-cross pattern to a first stage torque of 10 Nm.
  • Tighten bolts in a criss-cross pattern a final additional 90 degree turn.
View full procedure

DL382 Transmission Mount Bolt Torque

Procedure for tightening the bolts that secure the transmission mounts to the vehicle frame and transmission housing.

  • Install transmission mounts with new bolts. Always use new bolts for engine/transmission mounts.
  • Torque transmission mount to engine block bolts to 40 Nm.
  • Torque transmission mount to body bolts to 40 Nm.
View full procedure

DL382 Transmission Fill Plug Torque

Procedure for torquing the DL382 transmission fill plug.

  • Install the fill plug with a new sealing ring.
  • Torque the fill plug to 30 Nm
View full procedure

DL382 Transmission Drain Plug Torque

Procedure for torquing the DL382 transmission drain plug.

  • Install the drain plug with a new sealing ring.
  • Torque the drain plug to 30 Nm.
View full procedure
Technical Service Bulletins

Technical Bulletin: DL382 Transmission Oil Leak at Mechatronics Unit

2018-07-15

Some 2016-2018 Audi A5 models equipped with the DL382 transmission may experience oil leaks at the Mechatronics unit interface. This can be due to incorrect bolt torque or damaged sealing components. This bulletin superceeds all prior techincal bulletins on this issue. Always use new bolts when reinstalling the Mechatronics unit.

2016-2018 Audi A5

Resolution: Inspect the Mechatronics unit gasket for damage. Ensure all mounting surfaces are clean. Replace the Mechatronics unit mounting bolts with new bolts and torque to 10 Nm + 90 degrees.

Technical Bulletin: DL382 Transmission Mount Bolt Failure

2021-03-20

Certain 2018-2021 Audi A5 models may exhibit premature transmission mount bolt failure due to over-torque during assembly or repeated stress. This may result in noise, vibration or mount failure. Always use new mount bolts when servicing a transmission mount. Discard used bolts.

2018-2021 Audi A5

Resolution: Inspect transmission mount bolts for signs of stress or damage. Replace all transmission mount bolts with new bolts torqued to 40 Nm. This bulletin supersedes all prior mount bolt bulletins.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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