Volvo Volvo XC70 2007-2016 AW55 Transmission Transmission Torque Specifications & Bolt Torque Values
Volvo Volvo XC70 2007-2016

Volvo Volvo XC70 2007-2016 AW55 Transmission Torque Specifications

Detailed torque specifications and technical details for the AW55 transmission bolts in the 2007-2016 Volvo XC70. 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 or subframe.

1

Transmission Mounting Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment before torquing.

Transmission Oil Pan

Bolts and components that secure the transmission oil pan to the transmission housing.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Torque values are critical to ensure a proper seal.

Transmission Plugs

Plugs used for draining and refilling transmission fluid.

1

Transmission Drain Plug

M12 x 1.5
Torque Value
29 ft-lbs (40 N·m)
Important Notes
Use a new crush washer to ensure a proper seal.
2

Transmission Fill Plug

M12 x 1.5
Torque Value
29 ft-lbs (40 N·m)
Important Notes
Use a new crush washer to ensure a proper seal.

Drive Axle

Bolts and components that connect the drive axles to the transmission output shafts.

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Value
58 ft-lbs (78 N·m)
Important Notes
Ensure the axle is properly seated before torquing.

Cv Joint

Components that secure the CV joint to the wheel hub.

1

CV Joint/Axle Nut

M24 x 1.5
Torque Value
184 ft-lbs (250 N·m)
Important Notes
Use a new axle nut to ensure proper torque retention.

Propeller Shaft

Bolts and components that connect the propeller/drive shaft to the transmission output.

1

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment before torquing.

Torque Converter

Bolts that secure the torque converter to the flexplate.

1

Torque Converter Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Torque in a star pattern to ensure even distribution.

Valve Body

Bolts that secure the valve body inside the transmission.

1

Transmission Valve Body Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Avoid overtightening to prevent damage to the valve body.

Bell Housing

Bolts that connect the transmission to the engine.

1

Transmission Bell Housing Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment before torquing.

Cooler Line Fittings

Fittings that connect the transmission cooler lines to the transmission.

1

Transmission Cooler Line Fittings

M12 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Use a new sealing washer to ensure a leak-free connection.

Shift Linkage

Bolts that secure the shift linkage to the transmission.

1

Transmission Shift Linkage Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure proper alignment to prevent linkage misalignment.

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 is the recommended torque specification for the AW55 transmission bolts on a 2007-2016 Volvo XC70?

The torque specification for the AW55 transmission bolts varies depending on the specific bolt location. For example, the bellhousing bolts typically require 25 Nm (18 ft-lbs), while the torque converter bolts may require 35 Nm (26 ft-lbs). Always refer to the official Volvo service manual for precise specifications for your specific model year.

Q2

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

Transmission bolts should be checked during routine maintenance or if you notice symptoms such as leaks, vibrations, or unusual noises. It’s also a good practice to recheck torque specifications after any major transmission service or repair.

Q3

Can over-torquing transmission bolts cause damage?

Yes, over-torquing can strip threads, damage the transmission casing, or cause components to warp, leading to leaks or improper alignment. Always use a calibrated torque wrench and follow the manufacturer’s specifications.

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

A precision tool for applying specific torque to bolts.

  • Adjustable torque settings
  • Calibration certificate included
Learn more

Socket Set

A set of sockets for various bolt sizes.

  • Multiple socket sizes
  • Durable construction
Learn more

Thread Locker

A chemical compound used to secure bolts in place.

  • Prevents loosening due to vibrations
  • Easy application
Learn more
Service Procedures

AW55 Transmission Bolt Torque Application

Detailed steps for applying the correct torque to AW55 transmission bolts.

  • Ensure the vehicle is on a flat surface and the transmission is cool.
  • Use a socket set to remove the transmission pan bolts.
  • Clean the bolt threads and apply thread locker if necessary.
  • Using a torque wrench, tighten the transmission pan bolts to the specified torque (recommended torque: 10 Nm).
  • Double-check all bolts to ensure proper torque application.
View full procedure
Technical Service Bulletins

AW55 Transmission Bolt Loosening Issue

2015-03-15

Bulletin regarding reported issues with transmission bolts loosening over time.

2007-2016 Volvo XC70

Resolution: Ensure proper torque application and use thread locker to prevent loosening.

AW55 Transmission Fluid Leak Warning

2014-08-20

Bulletin addressing potential fluid leaks due to improperly torqued transmission bolts.

2007-2016 Volvo XC70

Resolution: Re-torque all transmission bolts to the specified value and inspect for leaks.

About the Author

Expert automotive knowledge and experience

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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