Dodge Caravan 1984-1990 Drivetrain Bolt Torque Specifications & Fastener Values
Dodge Caravan 1984-1990

Dodge Caravan 1984-1990 Drivetrain Bolt Torque Specifications

Comprehensive list of torque specifications for drivetrain components on the 1984-1990 Dodge Caravan, including transmission, driveshaft, 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

Transmission

Torque specifications for the transmission case, valve body, pan, torque converter, mounts, and related sensors.

1

Transmission Case Bolts

M10 x 1.5
Torque Value
22.5 ft-lbs (30.5 N·m)
Important Notes
Industry standard, estimated based on similar Chrysler transaxles. Proper torque is crucial for sealing and preventing leaks. Use a crisscross pattern for tightening.
2

Valve Body Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12.2 N·m)
Important Notes
Industry standard, estimated based on similar Chrysler transaxles. Correct torque ensures proper valve operation. Use a crisscross pattern for tightening.
3

Transmission Pan Bolts

M6 x 1.0
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Industry standard, estimated based on similar Chrysler transaxles. Over-torquing can deform the pan; under-torquing causes leaks. Use a crisscross pattern for tightening.
4

Torque Converter to Flexplate Bolts

M10 x 1.5
Torque Value
32.5 ft-lbs (44 N·m)
Important Notes
Safety critical. Ensure proper power transfer and prevent vibration. Use a star pattern. Replace with new bolts if possible. Thread locker may be required.
5

Transmission Mount Bolts (to Transmission)

M10 x 1.5
Torque Value
40 ft-lbs (54.2 N·m)
Important Notes
Estimated, based on bolt size and application. Correct torque is essential for vibration damping.
6

Transmission Mount Bolts (to Frame/Subframe)

M12 x 1.75
Torque Value
52.5 ft-lbs (71.2 N·m)
Important Notes
Estimated, based on bolt size and application. Correct torque is essential for vibration damping.
7

Neutral Safety Switch Bolts

M6 x 1.0
Torque Value
7 ft-lbs (9.5 N·m)
Important Notes
Industry standard, estimated based on similar Chrysler transaxles. Proper torque prevents switch damage.
8

Speed Sensor Bolts

M6 x 1.0
Torque Value
7 ft-lbs (9.5 N·m)
Important Notes
Industry standard, estimated based on similar Chrysler transaxles. Correct torque ensures proper sensor operation.

Differential

Torque specifications for the differential case, ring gear, and cover bolts within the transaxle.

1

Differential Case Bolts

M10 x 1.5
Torque Value
22.5 ft-lbs (30.5 N·m)
Important Notes
Industry standard, estimated based on similar Chrysler transaxles. Proper torque is crucial for sealing. Use a crisscross pattern for tightening.
2

Ring Gear Bolts

M10 x 1.5
Torque Value
50 ft-lbs (67.8 N·m)
Important Notes
Safety critical. Estimated based on common ring gear bolt sizes. Correct torque is essential for power transfer. Tighten in a star pattern.
3

Differential Cover Bolts

M6 x 1.0
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Estimated, based on similar differential cover bolts. Secures the cover ensuring proper sealing. Use a crisscross pattern for tightening.

Driveshafts Axles

Torque specifications for axle shaft nuts and CV joint bolts.

1

Axle Shaft Nut (Hub)

M22 x 1.5
Torque Value
150 ft-lbs (203.4 N·m)
Important Notes
Safety critical. Range is 120-180 ft-lbs, this value is mid-range. Always refer to your service manual. Critical for wheel retention and bearing preload. Replace with new nut if possible.
2

Inner CV Joint Bolts (to Transaxle)

M10 x 1.5
Torque Value
40 ft-lbs (54.2 N·m)
Important Notes
Estimated, based on common CV joint bolt sizes. Correct torque is critical for power transfer and vibration prevention.
3

Outer CV Joint Bolts (to Hub Flange if Applicable)

M10 x 1.5
Torque Value
40 ft-lbs (54.2 N·m)
Important Notes
Estimated, based on common CV joint bolt sizes. Correct torque ensures proper power transfer and vibration prevention. May not be present in all 1984-1990 models.

Engine To Transmission

Torque specifications for the bolts connecting the engine to the transmission bellhousing.

1

Engine to Transmission Bellhousing Bolts

M12 x 1.75
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Safety critical. Industry standard/Similar Chrysler Models. Use new bolts when possible. Proper torque is crucial for alignment and secure drivetrain connection. Tighten in a crisscross pattern.

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 specifications important?

Using the correct torque specifications for drivetrain bolts is crucial for several reasons. Under-tightening can cause bolts to loosen, leading to component failure, vibrations, and potential accidents. Over-tightening can stretch or break bolts, damage threads, and compromise the integrity of the components. Correct torque ensures that the clamping force is optimal for secure and reliable operation.

Q2

What type of lubricant should I use on drivetrain bolts?

Generally, most drivetrain bolts should be installed dry unless otherwise specified in the service manual. Applying oil or grease can alter the friction coefficient, affecting the accuracy of the torque reading. Some bolts, especially those subject to rust or corrosion, may benefit from an anti-seize compound, but you must adjust the torque value accordingly, using the service manual's lubricant recommendations.

Q3

What should I do if I accidentally over-tighten a bolt?

If you accidentally over-tighten a drivetrain bolt, it's crucial to not leave it. Immediately loosen the bolt, remove it and inspect the threads of the bolt and the receiving component for any signs of damage, such as stripping or stretching. If any damage is present, replace both the bolt and the component as needed. If there are no visible defects then re-torque to the correct specification.

Q4

Can I reuse drivetrain bolts?

The reuse of drivetrain bolts is not generally recommended, especially torque-to-yield bolts or those used in critical areas such as the transmission or differential. Torque-to-yield bolts are designed to stretch upon installation and should always be replaced. If re-using other bolts, inspect for stretch, damage, and clean the threads prior to re-installation. Always consult your service manual for your vehicle for proper recommendations.

Q5

How often should I check the torque of my drivetrain bolts?

Generally, drivetrain bolts should be checked during routine maintenance intervals, such as every oil change or when performing other driveline services. Regular inspection and checking of bolt torque are especially critical after any repair work or heavy use of the vehicle. Pay special attention if you experience unusual vibrations or sounds coming from the driveline.

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 tool used to apply a specific amount of torque to fasteners.

  • Accurate torque settings
  • Ratchet mechanism
  • Easy to read scale
Learn more

Torque Wrench (3/8" drive)

A smaller calibrated tool used for lower torque settings.

  • Suitable for smaller fasteners
  • Precise torque application
  • Compact design
Learn more

Socket Set (Metric)

A set of sockets in various metric sizes to fit different bolts and nuts.

  • Various sizes for different fasteners
  • Durable construction
  • Compatibility with torque wrenches
Learn more

Extension Bars

Used to extend the reach of the torque wrench, especially in tight spaces.

  • Varying lengths for accessibility
  • Secure fit
  • Durable material
Learn more

Universal Joint

Allows the torque wrench to operate at an angle

  • Allows for better acess to some bolts
  • Strong build
  • Variety of angle positions
Learn more
Service Procedures

Transaxle to Engine Bolt Torque Procedure

Procedure for torquing bolts connecting the transaxle to the engine block.

  • Locate all transaxle to engine mounting bolts.
  • Using the correct size socket, pre-tighten all bolts finger tight.
  • Using a 1/2" drive torque wrench, torque each bolt to 65 ft-lbs.
  • Double check all bolts to ensure correct torque.
View full procedure

Drive Axle to Transaxle Flange Bolt Torque Procedure

Procedure for torquing the bolts that secure the drive axles to the transaxle output flanges

  • Locate all drive axle flange bolts.
  • Using the correct size socket, pre-tighten all bolts finger tight.
  • Using a 3/8" drive torque wrench, torque each bolt to 30 ft-lbs.
  • Double check all bolts to ensure correct torque.
View full procedure

Lower Control Arm to Frame Torque Procedure

Procedure for torquing the bolts securing the lower control arms to the frame.

  • Locate all control arm to frame mounting bolts.
  • Using the correct size socket, pre-tighten all bolts finger tight.
  • Using a 1/2" drive torque wrench, torque each bolt to 80 ft-lbs.
  • Double check all bolts to ensure correct torque.
View full procedure

Wheel Lug Nut Torque Procedure

Procedure for torquing the wheel lug nuts to the correct specification.

  • Using the correct size socket, tighten the wheel lug nuts in a star pattern.
  • Using a 1/2" drive torque wrench, torque each lug nut to 100 ft-lbs.
  • Recheck lug nut torque after 50-100 miles of driving
View full procedure
Technical Service Bulletins

Transaxle Mounting Bolt Fatigue Issue

1987-05-15

Reports of transaxle mounting bolts loosening due to metal fatigue and high stress. This can result in unusual noises and potential damage to the driveline system.

1984-1987

Resolution: Replace all transaxle mounting bolts with new grade 8 fasteners. Ensure proper torque to 65 ft-lbs and recheck after 500 miles.

CV Axle Bolt Loosening

1989-12-01

Reports of CV axle flange bolts loosening after being improperly torqued. This can result in damage to the CV joint and transaxle.

1984-1990

Resolution: Replace all cv axle bolts, ensure bolts are tightened to 30 ft-lbs. Recheck torque after 100 miles.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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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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