Chrysler Voyager 1984-1990

Chrysler Voyager 1984-1990 Drivetrain Bolt Torque Specifications

Detailed torque specifications for bolts related to the drivetrain components of the 1984-1990 Chrysler Voyager, including transmission, differential, and axles.

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 Case

Torque specifications for the main transmission case and related components, ensuring proper sealing and structural integrity.

1

Transmission Case Bolts

M10 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Secures the main transmission case halves. Critical for fluid retention and structural integrity. Torque evenly.
2

Transmission Case Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Secures various components to the transmission case. Proper torque prevents case distortion.
3

Transmission Pan Bolts

M6 x 1.0
Torque Value
10 ft-lbs (14 N·m)
Important Notes
Attaches the transmission oil pan to the transmission case. Use a criss-cross pattern. Overtightening can warp the pan.
4

Valve Body Bolts

M6 x 1.0
Torque Value
7 ft-lbs (9 N·m)
Important Notes
Secures the valve body. Accurate torque is crucial to prevent leaks and proper valve function. Estimated value.
5

Differential Carrier Bolts

M10 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Secures the differential carrier to the transmission housing. Critical for gear alignment.
6

Differential Cover Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Secures the differential cover to the carrier. Prevents leaks. Estimated Value.

Transmission Mounting

Specifications for mounting the transmission to the vehicle body and related components.

1

Transmission Mount Bolts

M10 x 1.5
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Secures the transmission mount to the body and transmission. Crucial for stability.

Torque Converter

Specifications for securing the torque converter to the engine's drive plate (flexplate).

1

Torque Converter Bolts to Drive Plate

M8 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Connects the torque converter to the engine's flexplate. Torque evenly in a star pattern.

Driveshafts Cv Axles

Torque values for CV axles and related fasteners, ensuring proper wheel connection and drivetrain performance.

1

CV Axle Nut (Front Wheel Drive)

M22 x 1.5
Torque Value
150 ft-lbs (203 N·m)
Important Notes
Secures the CV axle to the wheel hub. Always use a new nut. Critical for wheel retention.
2

CV Axle Bolts to Transmission Flange

M8 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Secures the inner CV joint flange to the transmission. Proper torque prevents vibration.

Engine To Transmission

Specifications for connecting the engine block to the transmission housing.

1

Engine to Transaxle Mounting Bolts

M12 x 1.75
Torque Value
65 ft-lbs (88 N·m)
Important Notes
Main bolts securing the engine to the transmission. Tighten in sequence. Critical for proper alignment.
2

Starter Motor Mounting Bolts

M10 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Secures the starter to the transmission housing. Estimated value.

Miscellaneous Drivetrain

Specifications for various drivetrain related components, sensors and linkages.

1

Speed Sensor Mounting Bolt

M6 x 1.0
Torque Value
7 ft-lbs (9 N·m)
Important Notes
Secures the vehicle speed sensor. Estimated value.
2

Shift Linkage Bolts

M6 x 1.0
Torque Value
10 ft-lbs (14 N·m)
Important Notes
Secures the shift linkage. Estimated value.

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 using the correct torque specification so important for drivetrain bolts?

Using the correct torque specification is crucial to ensure proper clamping force on the components. Overtightening can stretch or break bolts, causing component damage, premature wear, and potential failure. Undertightening can lead to loosening, which can also cause damage, vibration, and potentially dangerous situations. Imagine a lug nut not torqued correctly - it could come off while driving. Similarly, drivetrain components require specific torque for long-term reliability.

Q2

What happens if I don't have a torque wrench?

While it's highly recommended to use a torque wrench for drivetrain components, not having one can be a problem. 'Good and tight' is not acceptable for critical drivetrain fasteners. Improper torque can cause damage and potentially dangerous situations. While you might get away with it in some non critical areas, drivetrain components must be torqued to spec. If a torque wrench is absolutely unavailable, borrow or rent one rather than guessing. Always verify torque specs in the service manual.

Q3

Should I use threadlocker on drivetrain bolts?

The use of threadlocker (like Loctite) depends on the specific bolt and application. Some bolts are designed to be used with threadlocker, often to prevent loosening due to vibration. The Chrysler service manual for your year of Voyager will specify if threadlocker is needed. Never use threadlocker unless it is specified or you risk damaging the bolt or the component. It is recommended to always use new bolts that are pre-coated with thread locker when available.

Q4

How often should I check the torque on my drivetrain components?

Checking the torque on drivetrain components is recommended after any work is performed that requires their removal or loosening. For routine maintenance, it's a good practice to check torque after the first 50-100 miles following a repair. Then recheck during regular maintenance intervals. If you drive often in harsh conditions you may consider a more frequent check. Refer to your vehicles service manual for recommended maintenance intervals.

Q5

What if I think I may have overtightened a bolt?

If you suspect that you have overtightened a bolt, it's best to err on the side of caution. Loosen the bolt, and then retorque it to the correct specification with a calibrated torque wrench. Overtightened bolts can be weakened and can fail even if they don't show immediate damage. It is often better to replace a bolt you suspect has been overtightened than risk having it fail later.

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 calibrated tool for applying precise torque to fasteners.

  • Various torque ranges available to meet specification requirements
  • Click-type or dial-type options
  • Accuracy within +/- 3%
Learn more

Socket Set (Metric)

A set of sockets needed to fit the various bolt and nut sizes on the drivetrain.

  • Includes common sizes 10mm through 19mm
  • 6-point sockets are preferred to avoid rounding of fasteners
  • Deep and shallow sockets are necessary for accessing various areas
Learn more

Extension Bars

Used to reach fasteners in hard-to-access areas

  • Various lengths are needed for different applications
  • Can be used with u-joints to reach difficult angles
  • Must be sturdy and impact-rated
Learn more

U-Joint Adapters

Allow the torque wrench to be used at an angle.

  • Allows for accurate torque application at an angle
  • Must be high quality to prevent slippage or damage
  • Various sizes may be needed
Learn more
Service Procedures

Driveshaft Bolt Torque Procedure

Properly torquing the driveshaft bolts is crucial for maintaining driveline integrity and preventing vibration. Incorrect torque can cause premature wear and potential failure.

  • 1. Identify the specific driveshaft bolts (usually at the transmission and differential flanges).
  • 2. Clean the threads of the bolts and receiving holes.
  • 3. Install the bolts by hand ensuring they are properly threaded.
  • 4. Using the correct socket and torque wrench, tighten each bolt to 35 ft-lbs (47 N-m) for the transmission flange and differential flange on models equipped with a 2.2l or 2.5l engine and to 45 ft-lbs (61 N-m) on models with a 3.0l engine.
  • 5. Tighten the bolts in a crisscross pattern, gradually bringing them to the specified torque to ensure even pressure.
  • 6. Double check each bolt with the torque wrench for proper torque.
View full procedure

Transaxle Mount Bolt Torque Procedure

Correct torque on transaxle mount bolts ensures proper engine/transaxle alignment and reduces vibration. Improper torque can lead to premature mount failure and vibrations.

  • 1. Locate the transaxle mounting bolts (typically 4 to 6 bolts).
  • 2. Clean the threads of the bolts and the mounting surface.
  • 3. Install the bolts by hand ensuring they are properly threaded.
  • 4. Using the correct socket and torque wrench, tighten each bolt to 50 ft-lbs (68 N-m).
  • 5. Tighten the bolts in a crisscross pattern to ensure even pressure.
  • 6. Double check each bolt with the torque wrench for proper torque.
View full procedure

Differential Cover Bolt Torque Procedure

Proper torque of the differential cover bolts is essential for maintaining a leak-free seal and protecting the differential components.

  • 1. Locate the differential cover bolts (typically 8-12 bolts surrounding the differential cover).
  • 2. Clean the threads of the bolts and the mating surface of the differential and cover.
  • 3. Install the bolts by hand ensuring they are properly threaded.
  • 4. Using the correct socket and torque wrench, tighten each bolt to 20 ft-lbs (27 N-m).
  • 5. Tighten the bolts in a crisscross pattern to ensure even pressure and a uniform seal.
  • 6. Double check each bolt with the torque wrench for proper torque.
View full procedure
Technical Service Bulletins

Driveshaft Bolt Loosening Issue

1987-04-15

Reports have been received regarding premature loosening of driveshaft bolts. This issue may cause vibration and potential damage to the driveshaft and surrounding components if left unaddressed.

1984-1987

Resolution: Inspect and tighten driveshaft bolts to the correct torque specifications. Apply a small amount of medium-strength thread locker to the threads of the bolt before reinstallation. Check bolts regularly during service intervals.

Transaxle Mount Bolt Shear Investigation

1989-11-20

An investigation into reports of transaxle mount bolt shearing has revealed that bolts may be over-torqued during installation leading to failure. Proper torque is critical for longevity. Using an old torque wrench should be avoided.

1984-1990

Resolution: Ensure torque wrench is calibrated and only tighten bolts to the correct specification of 50 ft-lbs (68 N-m). Replace any suspect bolts with new high-quality fasteners during service.

About the Author

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Alan Montanye - Automotive Technical Specialist
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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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