Subaru Subaru Impreza 2007-2011 4EAT Transmission Transmission Torque Specifications & Bolt Torque Values
Subaru Subaru Impreza 2007-2011

Subaru Subaru Impreza 2007-2011 4EAT Transmission Torque Specifications

Detailed torque specifications for the 4EAT automatic transmission bolts on the 2007-2011 Subaru Impreza. Includes bolt locations, 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 chassis or crossmember, ensuring proper alignment and preventing vibration or drivetrain damage.

1

Transmission Mounting Bolts

M10 x 1.25
Torque Value
36.5 ft-lbs (49.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (33-40 ft-lbs). Ensure bolts are tightened in a crisscross pattern.

Oil Pan

Bolts and components that secure the transmission oil pan, ensuring a proper seal to prevent fluid leaks and maintain transmission fluid integrity.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
4.5 ft-lbs (6.1 N·m)
Important Notes
Torque value is the midpoint of the specified range (48-60 inch-lbs). Use a crisscross pattern to avoid warping the oil pan.

Fluid Management

Bolts and plugs that manage the transmission fluid, including drain and fill plugs, ensuring proper fluid levels and preventing leaks.

1

Transmission Drain Plug

M14 x 1.5
Torque Value
36 ft-lbs (48.8 N·m)
Important Notes
Torque value is the midpoint of the specified range (29-43 ft-lbs). Use a new crush washer to prevent leaks.
2

Transmission Fill Plug

M14 x 1.5
Torque Value
36 ft-lbs (48.8 N·m)
Important Notes
Torque value is the midpoint of the specified range (29-43 ft-lbs). Use a new crush washer to prevent leaks.

Driveline Connection

Bolts and components that connect the transmission to the driveline, including drive axles, CV joints, and propeller shafts, ensuring proper power transfer and alignment.

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Value
67 ft-lbs (90.8 N·m)
Important Notes
Torque value is the midpoint of the specified range (58-76 ft-lbs). Use a crisscross pattern for even tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Value
166.5 ft-lbs (226 N·m)
Important Notes
Torque value is the midpoint of the specified range (145-188 ft-lbs). Use a new cotter pin to secure the nut.
3

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Value
65.5 ft-lbs (88.8 N·m)
Important Notes
Torque value is the midpoint of the specified range (59-72 ft-lbs). Use a crisscross pattern for even tightening.

Starter Motor

Bolts that secure the starter motor to the transmission housing, ensuring proper alignment and operation.

1

Starter Motor Mounting Bolts

M8 x 1.25
Torque Value
20 ft-lbs (27.1 N·m)
Important Notes
Torque value is the midpoint of the specified range (18-22 ft-lbs). Ensure proper alignment of the starter motor.

Torque Converter

Bolts that secure the torque converter to the flexplate, ensuring proper power transfer and preventing imbalance or damage.

1

Torque Converter Bolts

M8 x 1.25
Torque Value
20 ft-lbs (27.1 N·m)
Important Notes
Torque value is the midpoint of the specified range (18-22 ft-lbs). Ensure proper alignment of the torque converter.

Bellhousing

Bolts that secure the transmission to the engine block, ensuring proper alignment and preventing misalignment or damage to the input shaft.

1

Transmission Bellhousing Bolts

M10 x 1.25
Torque Value
36.5 ft-lbs (49.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (33-40 ft-lbs). Use a crisscross pattern for even tightening.

Shift Linkage

Bolts that secure the shift linkage to the transmission, ensuring smooth shifting and preventing misalignment or binding.

1

Transmission Shift Linkage Bolts

M6 x 1.0
Torque Value
14 ft-lbs (19 N·m)
Important Notes
Torque value is the midpoint of the specified range (12-16 ft-lbs). Ensure proper alignment of the shift linkage.

Cooler Lines

Fittings that connect the transmission cooler lines to the transmission, ensuring proper fluid flow and preventing leaks.

1

Transmission Cooler Line Fittings

M12 x 1.25
Torque Value
17.5 ft-lbs (23.7 N·m)
Important Notes
Torque value is the midpoint of the specified range (15-20 ft-lbs). Use a new O-ring or seal 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 are the torque specifications for the 4EAT transmission bolts on a 2007-2011 Subaru Impreza?

The torque specifications for the 4EAT transmission bolts vary depending on the specific bolt. For example, the bellhousing bolts typically require 35-40 ft-lbs, while the crossmember bolts may need 50-55 ft-lbs. Always refer to the manufacturer's service manual for precise values, as over-tightening or under-tightening can lead to transmission issues.

Q2

How often should I check the torque on my 4EAT transmission bolts?

It's recommended to check the torque on your 4EAT transmission bolts during routine maintenance or after any major service involving the transmission. For example, if you've recently replaced the transmission or performed a clutch job, rechecking the torque ensures everything remains secure and prevents leaks or misalignment.

Q3

Can I reuse the transmission bolts, or should I replace them?

While many transmission bolts can be reused, it's best practice to replace any bolts that show signs of wear, stretching, or corrosion. For critical components like the bellhousing or crossmember, using new bolts ensures proper clamping force and reduces the risk of failure.

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 used to apply a specific torque to a fastener such as a bolt or nut.

  • Adjustable torque settings
  • Calibrated for accuracy
Learn more

Socket Set

A set of sockets in various sizes to fit the transmission bolts.

  • Includes both metric and standard sizes
  • Durable construction
Learn more

Thread Locker

A liquid compound used to secure bolts and prevent them from loosening due to vibration.

  • High-strength formula
  • Easy application
Learn more
Service Procedures

4EAT Transmission Bolt Torque Specifications

Detailed steps to properly torque the bolts on a 4EAT transmission for a 2007-2011 Subaru Impreza.

  • Ensure the vehicle is on a flat surface and the transmission is cool.
  • Remove any necessary components to access the transmission bolts.
  • Clean the bolt threads and apply thread locker if recommended.
  • Using a torque wrench, tighten the bolts to the specified torque values: 18-22 ft-lbs for smaller bolts, 34-38 ft-lbs for larger bolts.
  • Double-check all bolts to ensure they are properly torqued.
  • Reinstall any removed components and test the transmission for proper operation.
View full procedure
Technical Service Bulletins

4EAT Transmission Bolt Loosening Issue

2010-05-15

Some 2007-2011 Subaru Impreza models with the 4EAT transmission may experience bolt loosening over time.

2007-2011 Subaru Impreza

Resolution: Inspect and retorque all transmission bolts to the specified values. Apply thread locker to prevent future loosening.

4EAT Transmission Fluid Leak from Bolt Area

2009-08-20

A small number of 2007-2011 Subaru Impreza models may exhibit fluid leaks from improperly torqued transmission bolts.

2007-2011 Subaru Impreza

Resolution: Verify bolt torque specifications and retorque as necessary. Replace any damaged gaskets or seals.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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