Chrysler 300 2005-2010 W5A580 Transmission Transmission Torque Specifications & Bolt Torque Values
Chrysler 300 2005-2010

Chrysler 300 2005-2010 W5A580 Transmission Torque Specifications

Detailed torque specifications for bolts used in the W5A580 transmission found in the 2005-2010 Chrysler 300. Includes pan bolts, valve body bolts, and bellhousing 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

Transmission Mounting

Bolts securing the transmission housing to the vehicle's frame or crossmember.

1

Transmission Mounting Bolts

M12 x 1.75
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Ensure the transmission is properly supported during installation. Use a thread lubricant compatible with your vehicle's specifications.

Transmission Oil Pan

Bolts securing the transmission oil pan to the transmission case.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Use a crisscross tightening sequence to ensure even pressure. Do not overtighten, as this may distort the pan and cause leaks.

Transmission Drain Fill Plugs

Bolts securing the transmission fill and drain plugs.

1

Transmission Drain/Fill Plug

M18 x 1.5
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Use a new crush washer or seal each time these plugs are reinstalled. Ensure the threads are clean before installation.

Bellhousing

Bolts connecting the bellhousing to the engine and securing the inspection cover.

1

Transmission Bellhousing Bolts to Engine

M12 x 1.75
Torque Value
38 ft-lbs (51 N·m)
Important Notes
Torque value is an estimated average and might vary. It is imperative to verify the correct value in your vehicle's service manual for your engine type (V6/V8). Use a thread lubricant compatible with your vehicle's specifications.
2

Bellhousing Inspection Cover Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten. This value is an estimated average. It is important to consult your service manual for the specific torque value for your transmission.

Torque Converter

Bolts securing the torque converter to the flexplate.

1

Torque Converter Bolts

M10 x 1.5
Torque Value
33 ft-lbs (44 N·m)
Important Notes
This value is an estimated average. Exact values must be confirmed with the service manual for your engine type and transmission. Ensure the bolts and flexplate surfaces are clean. Apply a thread locker if specified in the service manual. Use a crisscross pattern. DO NOT use an impact gun.

Valve Body

Bolts securing the valve body to the transmission case and securing the internal transmission filter.

1

Transmission Valve Body Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten using a specified sequence if provided in the service manual. This value is an estimated average. Proper torque is critical for valve body operation and preventing leaks within the transmission. Do not over-tighten these bolts.
2

Transmission Internal Filter Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Ensure proper filter orientation. Do not over-tighten these bolts as they can strip easily.

Output Shaft

Bolt securing the transmission output shaft/yoke.

1

Transmission Output Shaft/Yoke Bolt

M12 x 1.75
Torque Value
50 ft-lbs (68 N·m)
Important Notes
Consult the service manual to confirm the correct specification for your vehicle. Use a new bolt if specified by the manufacturer.

Cooler Lines

Fittings connecting the transmission cooler lines to the transmission housing.

1

Transmission Cooler Line Fittings

Varies Based on Fitting Type
Torque Value
18 ft-lbs (24 N·m)
Important Notes
This torque is an estimated average for standard fittings. Ensure all fittings are clean and undamaged. Torque values may vary based on the type of fitting used (e.g., banjo bolt, flare fitting). Always refer to your vehicle's service manual for the exact value for your type of fitting.

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 can lead to several problems. First, it can strip the threads in the transmission case, rendering the bolt hole unusable. This often requires expensive repairs like thread inserts or, in severe cases, case replacement. Second, excessive torque can cause the bolt to stretch or break, potentially leading to transmission leaks or component failure. Finally, it can crush the gasket or sealing material, again leading to leaks. Always use a calibrated torque wrench and the specified torque values.

Q2

Can I reuse the transmission pan bolts?

While you *can* reuse the transmission pan bolts in many cases, it is generally recommended to replace them, especially if they are showing any signs of corrosion, stretching, or damage. The small cost of new bolts is a good investment to prevent leaks and ensure proper sealing. For example, if a bolt is already stretched from previous installation, it might not achieve proper clamp load even when torqued correctly, leading to oil leaks.

Q3

Do I need to use threadlocker on transmission bolts?

Typically, threadlocker is not required for most transmission bolts, including the pan bolts and valve body bolts, on the w5a580. Torque specs are designed to create sufficient clamping force. However, if you are experiencing recurring issues with bolts loosening, or if it's specified in your service manual for a specific bolt, a light threadlocker (e.g., Loctite 242 or equivalent) can be used *sparingly*. Applying too much threadlocker can prevent correct torque application and complicate removal in the future.

Q4

What type of fluid should I use in the W5A580 transmission?

The W5A580 transmission in a 2005-2010 Chrysler 300 requires Mopar ATF+4 transmission fluid or a fluid specifically certified to meet the ATF+4 specification. Using the wrong fluid can cause significant damage to the transmission, leading to premature wear, shifting issues, and even complete failure. For example, Dexron or Mercon fluid are not compatible and will cause problems in the W5A580.

Q5

What is the purpose of the transmission pan gasket and why is it important?

The transmission pan gasket creates a seal between the transmission pan and the transmission case, preventing fluid leaks. It's crucial to install the gasket correctly and to use a new one with every pan removal. Failure to do so will lead to leaks and low fluid levels that can severely damage the transmission. For instance, if an old, hardened gasket is reused it's more likely to leak because it may no longer conform to the sealing surfaces.

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 torque wrench for accurate bolt tightening

  • Range: 10-100 ft-lbs
  • 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-handled breaker bar for added leverage

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

W5A580-Transmission Bolt Torque Specification

Procedure for tightening transmission bolts to specification

  • Step 1: Locate the transmission bolts and ensure they are clean and free of debris
  • Step 2: Apply a small amount of threadlocker to the bolts
  • Step 3: Tighten the bolts in a star pattern to the specified torque value (see chart)
  • Step 4: Verify the torque value using a torque wrench
View full procedure

Transmission Pan Removal and Installation

Procedure for removing and installing the transmission pan

  • Step 1: Raise the vehicle and support it with jack stands
  • Step 2: Remove the transmission pan bolts and carefully lower the pan
  • Step 3: Inspect the pan and replace the gasket if necessary
  • Step 4: Reinstall the pan and tighten the bolts to the specified torque value
View full procedure
Technical Service Bulletins

W5A580-Transmission Bolt Torque Specification Update

2007-02-15

Update to the transmission bolt torque specification to prevent premature wear

2005-2007 Chrysler 300

Resolution: Update the torque specification to 30 ft-lbs for all transmission bolts

Transmission Pan Leak Repair

2009-05-01

Procedure for repairing a transmission pan leak

2005-2010 Chrysler 300

Resolution: Replace the transmission pan gasket and tighten the bolts to the specified torque value

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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