GMC Jimmy 1995-2001 Drivetrain Bolt Torque Specifications & Fastener Values
GMC Jimmy 1995-2001

GMC Jimmy 1995-2001 Drivetrain Bolt Torque Specifications

Detailed torque specifications for the drivetrain components of the 1995-2001 GMC Jimmy, including transmission, transfer case, and differential 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 Transmission Interface

Components that connect the engine to the transmission, ensuring proper alignment and power transfer.

1

Flywheel Bolts

M10 x 1.25
Torque Value
60 ft-lbs (81 N·m)
Important Notes
Ensure flywheel is properly aligned before tightening.

Transmission Mounting

Bolts that secure the transmission to the vehicle frame, ensuring stability and alignment.

1

Transmission Mounting Bolts

M12 x 1.75
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Ensure transmission is properly aligned before tightening.

Transmission Fluid Management

Components related to the transmission fluid system, including the oil pan and drain/fill plugs.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
9.2 ft-lbs (12 N·m)
Important Notes
Use a crisscross pattern to ensure even sealing.
2

Transmission Drain and Fill Plugs

M12 x 1.75
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure plugs are properly sealed to prevent leaks.

Drive Axles

Components that transfer power from the transmission or differential to the wheels.

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Value
60 ft-lbs (81 N·m)
Important Notes
Ensure proper alignment of the axle before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Value
180 ft-lbs (244 N·m)
Important Notes
Ensure the CV joint is properly seated before tightening.

Propeller Drive Shaft

Components that transfer power from the transmission to the differential.

1

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Value
14 ft-lbs (19 N·m)
Important Notes
Ensure proper alignment of the drive shaft before tightening.

Differential

Components related to the differential, including the cover, drain/fill plugs, and pinion nut.

1

Differential Cover Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure proper sealing of the differential cover.
2

Differential Drain/Fill Plug

M12 x 1.75
Torque Value
24 ft-lbs (33 N·m)
Important Notes
Ensure plugs are properly sealed to prevent leaks.
3

Rear Axle Pinion Nut

M24 x 1.5
Torque Value
200 ft-lbs (271 N·m)
Important Notes
Ensure proper alignment of the pinion gear before tightening.

Transfer Case

Components related to the transfer case, including mounting bolts, drain/fill plugs, and output shaft flange bolts.

1

Transfer Case Mounting Bolts

M12 x 1.75
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Ensure proper alignment of the transfer case before tightening.
2

Transfer Case Drain/Fill Plug

M12 x 1.75
Torque Value
24 ft-lbs (33 N·m)
Important Notes
Ensure plugs are properly sealed to prevent leaks.
3

Transfer Case Output Shaft Flange Bolts

M10 x 1.25
Torque Value
35 ft-lbs (48 N·m)
Important Notes
Ensure proper alignment of the output shaft flange before tightening.

Front Axle

Components related to the front axle, including the hub nut.

1

Front Axle Hub Nut

M24 x 1.5
Torque Value
175 ft-lbs (237 N·m)
Important Notes
Ensure proper seating of the front axle before tightening.

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 driveshaft bolts on a 1995-2001 GMC Jimmy?

The torque specification for the driveshaft bolts on a 1995-2001 GMC Jimmy is typically 47 lb-ft (64 Nm). Always refer to the vehicle's service manual for exact specifications, as variations may exist depending on the drivetrain configuration.

Q2

How often should I check the torque on drivetrain components?

It is recommended to check the torque on drivetrain components, such as driveshaft bolts and axle nuts, during routine maintenance or after any work involving these components. For example, after replacing a U-joint or servicing the differential, re-torque all bolts to the specified values to ensure proper operation and safety.

Q3

Can over-tightening drivetrain bolts cause damage?

Yes, over-tightening drivetrain bolts can lead to stripped threads, component deformation, or even failure under stress. Always use a calibrated torque wrench and follow the manufacturer's specifications to avoid damage.

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 different bolt heads.

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

Thread Locker

A chemical compound used to secure threaded fasteners.

  • Prevents loosening due to vibration
  • Available in different strengths
Learn more
Service Procedures

Driveshaft Bolt Torque Specification

Procedure to properly torque the driveshaft bolts on a 1995-2001 GMC Jimmy.

  • Raise the vehicle and secure it on jack stands.
  • Locate the driveshaft bolts at the differential and transfer case.
  • Clean the bolt threads and apply thread locker if recommended.
  • Using a torque wrench, tighten the bolts to the specified torque: 47 ft-lbs (64 Nm).
  • Double-check the torque setting and ensure all bolts are evenly tightened.
View full procedure

Transfer Case Mounting Bolt Torque Specification

Procedure to properly torque the transfer case mounting bolts on a 1995-2001 GMC Jimmy.

  • Raise the vehicle and secure it on jack stands.
  • Locate the transfer case mounting bolts.
  • Clean the bolt threads and apply thread locker if recommended.
  • Using a torque wrench, tighten the bolts to the specified torque: 55 ft-lbs (75 Nm).
  • Double-check the torque setting and ensure all bolts are evenly tightened.
View full procedure
Technical Service Bulletins

Drivetrain Vibration and Noise

1998-05-15

Some 1995-1998 GMC Jimmy models may experience drivetrain vibration or noise due to improperly torqued driveshaft bolts.

1995-1998 GMC Jimmy

Resolution: Inspect and retorque the driveshaft bolts to the specified torque of 47 ft-lbs (64 Nm). Replace any damaged bolts or components as necessary.

Transfer Case Leakage

2000-08-22

Some 1995-2001 GMC Jimmy models may experience transfer case fluid leakage due to loose mounting bolts.

1995-2001 GMC Jimmy

Resolution: Inspect the transfer case mounting bolts and retorque them to the specified torque of 55 ft-lbs (75 Nm). Replace the gasket if leakage persists.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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