Volvo Volvo V50 2004-2012 AW55 Transmission Transmission Torque Specifications & Bolt Torque Values
Volvo Volvo V50 2004-2012

Volvo Volvo V50 2004-2012 AW55 Transmission Torque Specifications

Detailed torque specifications for the AW55 transmission bolts in the 2004-2012 Volvo V50. Includes bolt types, torque values, and installation tips.

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 chassis and engine block.

1

Transmission Mounting Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment of the transmission before tightening.
2

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.

Oil Pan And Fluid Management

Bolts and components related to the transmission oil pan, drain, and fill plugs.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Avoid overtightening to prevent damage to the gasket.
2

Transmission Drain Plug

M14 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Ensure the plug is properly sealed to prevent leaks.
3

Transmission Fill Plug

M14 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Ensure the plug is properly sealed to prevent leaks.

Drive Axle And Shafts

Bolts and components related to the drive axles, CV joints, and propeller/drive shafts.

1

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Value
118 ft-lbs (160 N·m)
Important Notes
Ensure the axle is properly seated before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Value
177 ft-lbs (240 N·m)
Important Notes
Ensure the CV joint is properly seated before tightening.
3

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Ensure the drive shaft is properly aligned before tightening.

Internal Components

Bolts and components related to the internal transmission assembly, including the torque converter and valve body.

1

Torque Converter Bolts

M8 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the torque converter is properly seated before tightening.
2

Transmission Valve Body Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Avoid overtightening to prevent damage to internal components.

External Components

Bolts and components related to external transmission systems, including the starter motor and shift linkage.

1

Starter Motor Mounting Bolts

M8 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the starter motor is properly aligned before tightening.
2

Transmission Shift Linkage Bolts

M6 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure the shift linkage is properly aligned before tightening.
3

Transmission Cooler Line Fittings

M12 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the fittings are properly sealed to prevent leaks.

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 2004-2012 Volvo V50?

The recommended torque specification for the AW55 transmission bolts on a 2004-2012 Volvo V50 is 30-40 Nm (22-30 ft-lbs) for the transmission pan bolts and 50-60 Nm (37-44 ft-lbs) for the transmission case bolts. It's essential to consult the repair manual or a trusted mechanic for specific torque values, as over-torquing can damage the transmission.

Q2

How often should I check the transmission fluid level and condition in my AW55 transmission?

It's recommended to check the transmission fluid level and condition every 30,000 to 60,000 miles. Low fluid levels or contaminated fluid can cause premature wear on the transmission components, leading to costly repairs. Always use the recommended transmission fluid type and consult the owner's manual for specific guidelines.

Q3

Can I use a torque wrench with a socket extension to tighten the transmission bolts?

Yes, but it's crucial to ensure the socket extension is securely attached to the torque wrench and the bolt. A loose extension can cause the torque wrench to slip, resulting in over-torquing or under-torquing the bolt. Always use a high-quality socket extension and follow the manufacturer's instructions.

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 accurate torque values

  • Range: 10-100 Nm
  • Accuracy: ± 2%
Learn more

Socket Set

A set of sockets for various bolt sizes

  • Sizes: 10mm, 12mm, 14mm
  • Material: Chrome Vanadium
Learn more

Breaker Bar

A long, flexible bar for applying extra torque

  • Length: 24 inches
  • Material: Steel
Learn more
Service Procedures

AW55 Transmission Bolt Torque Specification

Procedure for applying correct torque values to AW55 transmission bolts

  • Locate the AW55 transmission bolts
  • Apply the correct torque value (see specifications)
  • Tighten the bolts in a star pattern
View full procedure

AW55 Transmission Fluid Change

Procedure for changing the transmission fluid in the AW55 transmission

  • Drain the old transmission fluid
  • Install a new transmission fluid filter
  • Refill with new transmission fluid
View full procedure
Technical Service Bulletins

AW55 Transmission Bolt Torque Specification Update

2007-03-15

Updated torque specification for AW55 transmission bolts

2004-2012 Volvo V50

Resolution: Apply the updated torque value (see specifications)

AW55 Transmission Fluid Leaks

2009-09-01

Procedure for diagnosing and repairing AW55 transmission fluid leaks

2004-2012 Volvo V50

Resolution: Inspect the transmission for signs of leaks, and replace the seals or gaskets as necessary

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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