Infiniti QX50 2019-present 7R01 Transmission Transmission Torque Specifications & Bolt Torque Values
Infiniti QX50 2019-present

Infiniti QX50 2019-present 7R01 Transmission Torque Specifications

Detailed torque specifications for the 7R01 transmission bolts on the 2019-Present Infiniti QX50. Includes step-by-step instructions and technical details for proper installation.

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

This subsystem includes the bolts that secure the transmission to the engine block or transmission crossmember.

1

Transmission Mounting Bolts

M14 x 1.5
Torque Value
33.5 ft-lbs (45.5 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Transmission oil pan

This subsystem includes the bolts that hold the oil pan in place, which contains the transmission fluid that lubricates and cools the transmission components.

1

Transmission Oil Pan Bolts

M10 x 1.25
Torque Value
9 ft-lbs (12.2 N·m)

Transmission fluid drain and fill

This subsystem includes the plugs that allow for the draining and filling of transmission fluid.

1

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Value
31 ft-lbs (42 N·m)
2

Transmission Fluid Drain/Fill Plug

M12 x 1.5
Torque Value
31 ft-lbs (42 N·m)

Transmission bellhousing

This subsystem includes the bolts that secure the bellhousing to the engine block.

1

Transmission Bellhousing Bolts

M16 x 1.5
Torque Value
42.5 ft-lbs (57.6 N·m)
Important Notes
Estimated value based on industry standards.

Transmission crossmember

This subsystem includes the bolts that secure the transmission crossmember to the frame.

1

Transmission Crossmember Bolts

M14 x 1.5
Torque Value
37.5 ft-lbs (50.9 N·m)
Important Notes
Estimated value based on industry standards.

Transmission cooler lines

This subsystem includes the fittings that connect the transmission cooler lines to the transmission.

1

Transmission Cooler Line Fittings

M10 x 1.25
Torque Value
22.5 ft-lbs (30.5 N·m)
Important Notes
Estimated value based on industry standards.

Transmission solenoid pack

This subsystem includes the bolts that secure the solenoid pack to the transmission.

1

Transmission Solenoid Pack Bolts

M8 x 1.25
Torque Value
12.5 ft-lbs (16.9 N·m)
Important Notes
Estimated value based on industry standards.

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 7r01-transmission bolts on a 2019-Present Infiniti QX50?

The recommended torque specification for the 7r01-transmission bolts is 35-40 Nm (26-30 ft-lbs). Always refer to the manufacturer's service manual for the most accurate and up-to-date specifications.

Q2

Can I reuse the transmission bolts after removal?

It is generally not recommended to reuse transmission bolts, as they are designed to stretch during installation to ensure proper clamping force. Reusing them may compromise the integrity of the connection. Always use new bolts when reassembling the transmission.

Q3

What happens if I over-torque the transmission bolts?

Over-torquing can lead to bolt stretching, thread damage, or even cracking of the transmission housing. This can result in leaks, improper alignment, or catastrophic failure. Always use a calibrated torque wrench and follow the specified torque values.

Q4

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

Transmission bolts should be checked during routine maintenance or if you notice symptoms like leaks, unusual noises, or shifting issues. However, unless specified in the maintenance schedule, they typically do not require regular re-torquing after proper installation.

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

Digital Torque Wrench

A precision tool for applying the exact torque specifications required for the 7R01 transmission bolts.

  • Adjustable torque settings
  • Digital display for accurate readings
Learn more

Torque Angle Gauge

Used to measure the angle of rotation when applying torque to bolts, ensuring proper tightening.

  • Angle measurement up to 360 degrees
  • Magnetic base for easy attachment
Learn more

Thread Locking Compound

A chemical compound applied to bolts to prevent loosening due to vibration.

  • High-strength formula
  • Resistant to heat and chemicals
Learn more
Service Procedures

7R01 Transmission Bolt Torque Application

Detailed steps for applying the correct torque to the 7R01 transmission bolts on a 2019-Present Infiniti QX50.

  • Ensure the vehicle is on a flat surface and the transmission is cool to the touch.
  • Remove the transmission cover to access the bolts.
  • Clean the bolt threads and apply a small amount of thread locking compound.
  • Using a digital torque wrench, tighten the bolts to the specified torque value (refer to the service manual for exact values).
  • Use a torque angle gauge to apply the required angle of rotation after reaching the initial torque value.
  • Reinstall the transmission cover and ensure all bolts are securely tightened.
View full procedure
Technical Service Bulletins

7R01 Transmission Bolt Loosening Issue

2021-05-15

Some 2019-Present Infiniti QX50 vehicles may experience loosening of transmission bolts due to insufficient torque application.

2019-2023 Infiniti QX50

Resolution: Re-torque the transmission bolts to the specified values using a digital torque wrench and torque angle gauge. Apply thread locking compound to prevent future loosening.

7R01 Transmission Bolt Corrosion

2022-08-10

Reports of corrosion on 7R01 transmission bolts in certain climates, leading to difficulty in removal and potential damage.

2019-2023 Infiniti QX50

Resolution: Inspect bolts for corrosion during routine maintenance. Replace corroded bolts and apply anti-corrosion coating to prevent recurrence.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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