RAM Ram 4500 2008-2015 Drivetrain Bolt Torque Specifications & Fastener Values
RAM Ram 4500 2008-2015

RAM Ram 4500 2008-2015 Drivetrain Bolt Torque Specifications

Detailed drivetrain bolt torque specifications for the 2008-2015 Ram 4500, including transmission, transfer case, and axle 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

Engine

The engine is the heart of the vehicle, and proper torque ensures its components are properly secured.

1

Flywheel Bolts

M14 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Proper torque ensures the flywheel is properly seated and the engine's rotational energy is transferred to the transmission.

Transmission

The transmission is responsible for transferring the engine's rotational energy to the drivetrain.

1

Transmission Mounting Bolts

M12 x 1.25
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Proper torque ensures the transmission is properly aligned and supported.
2

Transmission Oil Pan Bolts

M8 x 1.0
Torque Value
115 in-lbs (13 N·m)
Important Notes
Proper torque ensures the oil pan is properly sealed and the transmission's lubrication system is maintained.

Driveshaft

The driveshaft is responsible for transferring the transmission's rotational energy to the differential.

1

Propeller/Drive Shaft Bolts

M14 x 1.5
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Proper torque ensures the shaft is properly seated and the drivetrain's rotational energy is transferred to the wheels.
2

Driveshaft Center Bearing Bolts

M10 x 1.25
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Proper torque ensures the bearing is properly seated and the drivetrain's rotational energy is transferred to the wheels.

Differential

The differential is responsible for transferring the drivetrain's rotational energy to the wheels.

1

Differential Drain/Fill Plug

M12 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Proper torque ensures the plug is properly sealed and the differential's lubrication system is maintained.
2

Differential Cover Bolts

M10 x 1.25
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Proper torque ensures the cover is properly sealed and the differential's lubrication system is maintained.

Transfer Case

The transfer case is responsible for transferring the transmission's rotational energy to the drivetrain.

1

Transfer Case Drain/Fill Plug

M12 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Proper torque ensures the plug is properly sealed and the transfer case's lubrication system is maintained.
2

Transfer Case Mounting Bolts

M12 x 1.25
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Proper torque ensures the transfer case is properly aligned and supported.

Axles

The axles are responsible for transferring the drivetrain's rotational energy to the wheels.

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Value
70 ft-lbs (95 N·m)
Important Notes
Proper torque ensures the axles are properly seated and the drivetrain's rotational energy is transferred to the wheels.
2

CV Joint/Axle Nut

M20 x 1.5
Torque Value
185 ft-lbs (251 N·m)
Important Notes
Proper torque ensures the CV joint is properly seated and the drivetrain's rotational energy is transferred to the wheels.

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 drivetrain bolts on my 2008-2015 Ram 4500?

The recommended torque specification for the drivetrain bolts on your 2008-2015 Ram 4500 can be found in the repair manual or on the manufacturer's website. It's essential to follow the specified torque values to ensure proper installation and prevent damage to the drivetrain components.

Q2

How often should I check the drivetrain bolt torque specifications on my Ram 4500?

It's recommended to check the drivetrain bolt torque specifications every 12,000 to 15,000 miles or as specified in the repair manual. Additionally, if you notice any unusual noises, vibrations, or performance issues, you should inspect the drivetrain bolts and re-torque them as needed.

Q3

Can I use a impact wrench to tighten the drivetrain bolts on my Ram 4500?

While an impact wrench can be convenient, it's not recommended for tightening drivetrain bolts. Impact wrenches can apply too much force, which can damage the threads or strip the bolts. Instead, use a torque wrench to ensure accurate and controlled tightening.

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 for applying accurate torque values

  • Digital display
  • Adjustable torque range
Learn more

Socket Set

A set of sockets for various bolt sizes

  • Chrome vanadium steel
  • Metric and SAE sizes
Learn more

Breaker Bar

A long, flexible bar for applying extra torque

  • Heat-treated steel
  • Comfort grip handle
Learn more
Service Procedures

Drivetrain Bolt Torque Specification

A step-by-step guide to applying the correct torque values to drivetrain bolts

  • Locate the drivetrain bolts
  • Apply the correct torque value using a torque wrench
  • Verify the torque value using a breaker bar
View full procedure

Transfer Case Bolt Replacement

A step-by-step guide to replacing transfer case bolts

  • Raise the vehicle and remove the transfer case
  • Remove the old bolts and replace with new ones
  • Apply the correct torque value using a torque wrench
View full procedure
Technical Service Bulletins

Drivetrain Bolt Torque Specification Update

2012-07-15

An update to the drivetrain bolt torque specification for 2008-2015 Ram 4500 models

2008-2015 Ram 4500

Resolution: Apply the updated torque values to the drivetrain bolts

Transfer Case Bolt Failure

2010-03-01

A technical bulletin regarding transfer case bolt failure on 2008-2015 Ram 4500 models

2008-2015 Ram 4500

Resolution: Replace the transfer case bolts with new ones and apply the correct torque value

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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