Volkswagen Volkswagen Passat 2015-present DQ380 Transmission Transmission Torque Specifications & Bolt Torque Values
Volkswagen Volkswagen Passat 2015-present

Volkswagen Volkswagen Passat 2015-present DQ380 Transmission Torque Specifications

Detailed torque specifications for the DQ380 transmission bolts in the 2015-Present Volkswagen Passat. Includes bolt types, torque values, and tightening sequences.

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 Mounting

Bolts and components that secure the transmission to the vehicle's chassis, ensuring proper alignment and reducing vibrations.

1

Transmission Mounting Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to avoid misalignment.
2

Transmission Crossmember Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Estimated value based on similar mounting bolts.

Oil Pan

Bolts and components that secure the transmission oil pan, ensuring a leak-free seal and proper fluid containment.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure the gasket is properly seated before tightening.

Fluid Management

Plugs and components that allow for the draining and refilling of transmission fluid, ensuring proper lubrication and cooling.

1

Transmission Drain Plug

M12 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the sealing washer is replaced during installation.
2

Transmission Fill Plug

M12 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the sealing washer is replaced during installation.

Drivetrain

Bolts and components that connect the transmission to the drivetrain, ensuring smooth power transfer to the wheels.

1

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Ensure the axle is properly seated before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Value
148 ft-lbs (200 N·m)
Important Notes
Ensure the axle is properly seated before tightening.
3

Propeller/Drive Shaft Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the drive shaft is properly aligned before tightening.

Torque Converter

Bolts that secure the torque converter to the flexplate, ensuring smooth power transfer from the engine to the transmission.

1

Torque Converter Bolts

M10 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the torque converter is properly seated before tightening.

Bellhousing

Bolts that secure the transmission bellhousing to the engine block, ensuring proper alignment and preventing leaks.

1

Transmission Bellhousing Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the bellhousing is properly aligned with the engine block.

Shift Linkage

Bolts that secure the shift linkage to the transmission, ensuring precise gear selection and smooth operation.

1

Shift Linkage Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the shift linkage is properly aligned before tightening.

Control Module

Bolts that secure the TCM to the transmission, ensuring proper electrical communication and operation.

1

TCM Mounting Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure the TCM is properly seated before tightening.

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 are the torque specifications for the DQ380 transmission bolts?

The torque specifications for the DQ380 transmission bolts vary depending on the specific bolt and its location. For example, the transmission housing bolts typically require 40-50 Nm, while the drive flange bolts may require 80-90 Nm. Always refer to the official Volkswagen repair manual for precise values.

Q2

How often should I check the torque on my DQ380 transmission bolts?

It is recommended to check the torque on DQ380 transmission bolts during routine maintenance or after any significant repair work. For example, if the transmission has been removed and reinstalled, a torque check is essential to ensure proper assembly and prevent leaks or component failure.

Q3

Can I reuse the DQ380 transmission bolts?

Some bolts, such as those used for the transmission housing, can be reused if they are in good condition and not stretched. However, critical bolts like drive flange bolts are often single-use and should be replaced after removal to ensure proper clamping force and safety.

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

Digital Torque Wrench

A precision tool for applying accurate torque to bolts.

  • Adjustable torque settings
  • Digital display for precise readings
Learn more

Torque Angle Gauge

Used to measure the angle of rotation during torque-to-yield applications.

  • Magnetic base for easy attachment
  • Clear angle markings
Learn more

Thread Locking Compound

Ensures bolts remain secure after torque application.

  • High-strength formula
  • Resistant to vibration and temperature changes
Learn more
Service Procedures

DQ380 Transmission Bolt Torque Specifications

Detailed steps for applying the correct torque to DQ380 transmission bolts.

  • Clean all bolt threads and mating surfaces before installation.
  • Apply a small amount of thread locking compound to the bolt threads.
  • Hand-tighten all bolts to ensure proper alignment.
  • Use a digital torque wrench to tighten bolts to the specified torque value in a crisscross pattern.
  • For torque-to-yield bolts, use a torque angle gauge to achieve the required rotation after reaching the initial torque value.
View full procedure

DQ380 Transmission Mounting Bolt Replacement

Procedure for replacing and torquing transmission mounting bolts.

  • Lift the vehicle and secure it on jack stands.
  • Remove the underbody panels to access the transmission.
  • Loosen and remove the old mounting bolts using the appropriate tools.
  • Install new bolts and hand-tighten them.
  • Torque the bolts to the manufacturer's specifications using a digital torque wrench.
View full procedure
Technical Service Bulletins

DQ380 Transmission Bolt Loosening Issue

2021-03-15

Reports of transmission bolts loosening over time due to insufficient torque application.

2015-2023 Volkswagen Passat

Resolution: Ensure all transmission bolts are torqued to the correct specifications and use thread locking compound as recommended.

Updated Torque Specifications for DQ380 Transmission

2022-07-10

Revised torque specifications for certain DQ380 transmission bolts to improve reliability.

2015-2023 Volkswagen Passat

Resolution: Refer to the updated service manual for the revised torque values and apply them during service.

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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