Cadillac ATS 2013-2019 Drivetrain Bolt Torque Specifications & Fastener Values
Cadillac ATS 2013-2019

Cadillac ATS 2013-2019 Drivetrain Bolt Torque Specifications

Detailed torque specifications for drivetrain bolts on the 2013-2019 Cadillac ATS, including transmission, driveshaft, differential, and axle components. This includes both standard and performance models.

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

Engine To Transmission

These specifications cover the fasteners connecting the engine to the transmission, including the flywheel and torque converter.

1

Flywheel Bolts

M10 x 1.25
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure. New bolts are recommended.
2

Torque Converter Bolts

M8 x 1.25
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Estimated torque value based on typical application. Confirm specific torque with service manual.
3

Transmission Mounting Bolts

M12 x 1.75
Torque Value
52 ft-lbs (70 N·m)
Important Notes
Ensure transmission is properly aligned before tightening.

Transmission

These specifications cover fasteners related to the transmission case and fluid management.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
8.8 ft-lbs (12 N·m)
Important Notes
Tighten in a cross pattern to prevent leaks. Use a new gasket or sealant as needed.
2

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Use a new sealing washer. Do not over-tighten.

Driveshaft And Axles

These specifications cover fasteners related to the driveshaft, axles, and their connections.

1

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Ensure proper alignment before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Value
118 ft-lbs (160 N·m)
Important Notes
Use a new nut and follow the specific tightening procedure for your vehicle.
3

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten evenly to prevent vibration.
4

Driveshaft Center Support Bearing Bolts

M10 x 1.5
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Estimated torque value; verify with service manual.

Differential

These specifications cover fasteners related to the differential housing and fluid management.

1

Differential Drain/Fill Plug

M18 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Use a new sealing washer.
2

Differential Case Bolts

M12 x 1.75
Torque Value
60 ft-lbs (81 N·m)
Important Notes
Estimated torque value; verify with service manual.
3

Differential Cover Bolts

M8 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Tighten in a cross pattern. Use a new gasket or sealant.
4

Pinion Flange Nut

M22 x 1.5
Torque Value
140 ft-lbs (190 N·m)
Important Notes
Estimated torque value; verify with service manual. This is a critical fastener for bearing preload.

Transfer Case

These specifications cover fasteners related to the transfer case housing and fluid management (AWD models only).

1

Transfer Case Drain/Fill Plug

M18 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Use a new sealing washer.

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

Why is it important to use the correct torque specifications for drivetrain bolts?

Using the correct torque specifications ensures proper clamping force, preventing bolts from loosening due to vibration, stress, and thermal expansion. Under-torquing can lead to component failure, while over-torquing can damage the bolt, threads, or the component itself. For example, an improperly torqued driveshaft bolt could lead to driveline vibration and potentially catastrophic failure.

Q2

What happens if I over-torque a drivetrain bolt?

Over-torquing can stretch or break the bolt, damage the threads in the component it's attached to, and potentially distort or deform the joined parts. This can lead to premature failure, requiring costly repairs. For example, over-torquing a differential cover bolt can crush the gasket, leading to leaks.

Q3

What happens if I under-torque a drivetrain bolt?

Under-torquing can allow the bolt to loosen over time due to vibration and stress. This leads to component movement, increased wear, and possible separation or failure. For example, an under-torqued transmission mount bolt could cause excessive movement and vibration, leading to damage of nearby components and increased NVH (noise, vibration, and harshness).

Q4

Should I use threadlocker on drivetrain bolts?

Generally, yes. Many drivetrain bolts are designed to be used with a medium-strength threadlocker (such as Loctite 242 or equivalent) to prevent them from loosening. Refer to the specific service manual for each component. Using threadlocker is especially important in areas exposed to high vibration, heat, and stress. A good example would be the bolts on the propeller shaft or driveshaft flange.

Q5

Do I need to replace drivetrain bolts every time they are removed?

Some drivetrain bolts are torque-to-yield (TTY) and must be replaced every time they are removed. These bolts are designed to stretch slightly when torqued to a specific specification and are not meant to be reused. Always consult the service manual for the specific component for whether new bolts are needed. Examples of TTY bolts are commonly found in components like axle flanges and differential ring gear bolts.

Q6

What type of torque wrench should I use for drivetrain work?

It is essential to use a calibrated torque wrench with the appropriate torque range for the bolts you are working on. A click-type torque wrench is recommended for most applications. When working on critical components, verify the accuracy of your torque wrench. A beam type is acceptable however requires a level of precision to use correctly. Remember to always check your torque wrench's calibration periodically and ensure it covers the required torque range. Using an improper wrench can lead to under or over torquing.

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 (1/2" Drive)

A calibrated torque wrench capable of measuring torque values from 20-150 lb-ft.

  • 1/2" drive for larger fasteners
  • Audible click when torque is reached
  • Capable of reading in both lb-ft and Nm
Learn more

Torque Wrench (3/8" Drive)

A calibrated torque wrench capable of measuring torque values from 5-80 lb-ft.

  • 3/8" drive for smaller fasteners
  • Audible click when torque is reached
  • Capable of reading in both lb-ft and Nm
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets, including deep and shallow sockets in the size ranges needed for drivetrain components.

  • Variety of sizes (10mm-24mm)
  • Both deep and shallow sockets
  • 6-point design for secure grip
Learn more

Wrench Set (Metric)

A comprehensive set of metric wrenches, including open-end and box-end wrenches in the size ranges needed for drivetrain components.

  • Variety of sizes (10mm-24mm)
  • Both open-end and box-end design
  • Chrome Vanadium for durability
Learn more

Extension Bars (Various Lengths)

Extension bars in various lengths to reach recessed bolts.

  • 3", 6", and 10" lengths
  • Allows access to difficult fasteners
  • Durable construction
Learn more

Universal Joint Adapter

A universal joint adapter to allow access to bolts at awkward angles.

  • Allows access to bolts at awkward angles
  • Durable construction
Learn more
Service Procedures

Driveshaft Bolt Torque Procedure

Procedure for properly torquing the driveshaft bolts on a 2013-2019 Cadillac ATS.

  • 1. Clean all mating surfaces and bolt threads.
  • 2. Install the driveshaft to the transmission output flange.
  • 3. Install bolts, and evenly tighten to 35 lb-ft (47 Nm) in a star pattern.
  • 4. Check and verify the torque to 35 lb-ft (47 Nm).
View full procedure

Rear Differential Mounting Bolt Torque Procedure

Procedure for properly torquing the rear differential mounting bolts on a 2013-2019 Cadillac ATS.

  • 1. Clean all mating surfaces and bolt threads.
  • 2. Install the rear differential to the frame.
  • 3. Install mounting bolts.
  • 4. Tighten the bolts to 74 lb-ft (100 Nm).
  • 5. Check and verify the torque to 74 lb-ft (100 Nm).
View full procedure

Rear Differential Cover Bolt Torque Procedure

Procedure for properly torquing the rear differential cover bolts on a 2013-2019 Cadillac ATS.

  • 1. Clean all mating surfaces and bolt threads.
  • 2. Install the rear differential cover using a new gasket or sealant.
  • 3. Install the differential cover bolts evenly.
  • 4. Tighten the bolts to 25 lb-ft (34 Nm).
  • 5. Check and verify the torque to 25 lb-ft (34 Nm).
View full procedure

Axle Nut Torque Procedure

Procedure for properly torquing the axle nut on a 2013-2019 Cadillac ATS.

  • 1. Clean all mating surfaces and threads.
  • 2. Install the axle.
  • 3. Install the new axle nut
  • 4. Tighten the axle nut to 155 lb-ft (210 Nm).
  • 5. Check and verify torque.
View full procedure
Technical Service Bulletins

Rear Differential Noise and Vibration

2016-03-15

Some 2013-2016 Cadillac ATS vehicles may experience noise and/or vibration from the rear differential. This may be due to incorrect bolt torque specifications or failed differential bushings.

2013-2016

Resolution: Inspect the rear differential mounting bushings, ensure proper torque of the mounting bolts to 74 lb-ft (100 Nm). If bushings are worn or damaged, replace them.

Driveshaft Vibration at High Speeds

2017-05-20

A vibration at higher speeds may be experienced on certain 2015-2017 Cadillac ATS models due to improper driveshaft installation or damaged universal joints.

2015-2017

Resolution: Check driveshaft bolts are torqued to 35 lb-ft (47 Nm), check driveshaft for damage and ensure U-joints are not binding. If issues persist, replace the driveshaft.

About the Author

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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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