Subaru Subaru Outback 2015-2019 TR690 Transmission Transmission Torque Specifications & Bolt Torque Values
Subaru Subaru Outback 2015-2019

Subaru Subaru Outback 2015-2019 TR690 Transmission Torque Specifications

Detailed torque specifications for the TR690 transmission bolts on the 2015-2019 Subaru Outback. Includes step-by-step instructions and technical details for proper installation and maintenance.

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 and engine block.

1

Transmission Mounting Bolts

M10 x 1.25
Torque Value
47 ft-lbs (63 N·m)
Important Notes
Ensure proper alignment of the transmission before tightening.
2

Transmission Bellhousing Bolts

M10 x 1.25
Torque Value
47 ft-lbs (63 N·m)
Important Notes
Ensure the transmission is properly aligned with the engine block.

Oil Pan

Bolts and components that secure the transmission oil pan and fluid-related fittings.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
5.9 ft-lbs (8 N·m)
Important Notes
Use a new gasket and ensure the sealing surface is clean.
2

Transmission Drain Plug

M14 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use a new crush washer to prevent leaks.
3

Transmission Fill Plug

M14 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use a new crush washer to prevent leaks.

Drivetrain Connections

Bolts and components that connect the transmission to the drivetrain, including axles, drive shafts, and CV joints.

1

Drive Axle/Half Shaft Bolts

M12 x 1.25
Torque Value
58 ft-lbs (78 N·m)
Important Notes
Ensure the axle is properly seated before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Value
152 ft-lbs (206 N·m)
Important Notes
Use a new cotter pin after tightening.
3

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Ensure the drive shaft is properly aligned before tightening.

Starter Motor

Bolts that secure the starter motor to the transmission housing.

1

Starter Motor Mounting Bolts

M8 x 1.25
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Ensure the starter motor is properly aligned with the flywheel.

Torque Converter

Bolts that secure the torque converter to the flexplate.

1

Torque Converter Bolts

M8 x 1.25
Torque Value
26 ft-lbs (35 N·m)
Important Notes
Ensure the torque converter is properly seated before tightening.

Shift Linkage

Bolts that secure the shift linkage to the transmission.

1

Shift Linkage Bolts

M6 x 1.0
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure the shift linkage is properly aligned for smooth operation.

Transmission Crossmember

Bolts that secure the transmission crossmember to the chassis.

1

Transmission Crossmember Bolts

M10 x 1.25
Torque Value
47 ft-lbs (63 N·m)
Important Notes
Ensure the crossmember is properly aligned before tightening.

Transmission Cooler

Fittings that connect the transmission cooler lines to the transmission.

1

Transmission Cooler Line Fittings

M12 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure the fittings are properly seated 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 torque specification for the TR690 transmission bolts on a 2015-2019 Subaru Outback?

The torque specification for the TR690 transmission bolts is typically 35-40 Nm (25-30 ft-lbs) for most bolts. However, always refer to the specific service manual for your vehicle, as torque values can vary depending on the bolt location and size.

Q2

Can I reuse the transmission bolts after removal?

It is generally recommended to replace transmission bolts after removal, as they are often torque-to-yield bolts designed for one-time use. Reusing them can compromise the integrity of the connection and lead to leaks or component failure.

Q3

How often should I check the torque on transmission bolts?

Transmission bolts should be checked during routine maintenance or if you notice symptoms like fluid leaks, unusual noises, or shifting issues. However, unless there is a specific issue, they typically do not require frequent re-torquing.

Q4

What tools are needed to torque the TR690 transmission bolts correctly?

You will need a calibrated torque wrench, a socket set that matches the bolt sizes, and a clean workspace. Ensure the torque wrench is set to the correct specification and that the bolts are tightened in the proper sequence to avoid uneven stress.

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 and attachments compatible with the transmission bolts.

  • Includes metric sizes
  • Durable construction
Learn more

Thread Locker

A chemical compound used to secure bolts and prevent loosening due to vibration.

  • High-strength formula
  • Temperature resistant
Learn more
Service Procedures

TR690 Transmission Bolt Torque Application

Detailed steps for properly torquing the transmission bolts on a 2015-2019 Subaru Outback with the TR690 transmission.

  • 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 specified.
  • Using a torque wrench, tighten the bolts in a crisscross pattern to the specified torque value.
  • Double-check the torque settings and ensure all bolts are properly secured.
  • Reinstall any removed components and test the vehicle for proper operation.
View full procedure
Technical Service Bulletins

TR690 Transmission Bolt Torque Specification Update

2018-05-15

Updated torque specifications for the TR690 transmission bolts to address potential loosening issues.

2015-2019 Subaru Outback

Resolution: Apply the updated torque specifications during service and use thread locker as recommended.

TR690 Transmission Bolt Inspection and Replacement

2017-11-20

Inspection and replacement guidelines for TR690 transmission bolts to prevent failure.

2015-2019 Subaru Outback

Resolution: Inspect bolts during routine maintenance and replace if signs of wear or damage are present.

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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  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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