Chrysler Prowler 1997-2002 42LE Transmission Transmission Torque Specifications & Bolt Torque Values
Chrysler Prowler 1997-2002

Chrysler Prowler 1997-2002 42LE Transmission Torque Specifications

Detailed torque specifications for all bolts related to the 42LE automatic transmission in the 1997-2002 Chrysler Prowler.

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 Mounting

Bolts securing the transmission to the engine and vehicle chassis.

1

Transmission Mounting Bolts

M12 x 1.75
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Secures the transmission housing to the engine and/or vehicle frame/crossmember. Ensure proper alignment before tightening.
2

Transmission Bellhousing Bolts to Engine

M12 x 1.75
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Connects the transmission bellhousing to the engine block. Ensure proper alignment of the transmission before tightening.

Oil Pan

Bolts securing the transmission oil pan to the transmission case.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
Secures the transmission oil pan to the case. Use a cross-tightening pattern. 105 in-lbs converted to ft-lbs

Drain Fill Plugs

Bolts/plugs for draining and filling transmission fluid.

1

Transmission Drain/Fill Plug

M20 x 1.5
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Secures the drain and fill plugs. Do not over-tighten to avoid damage.

Valve Body

Bolts securing the valve body to the transmission case.

1

Transmission Valve Body Mounting Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
Secures the valve body to the transmission case. Use a cross-tightening pattern. 105 in-lbs converted to ft-lbs

Solenoids

Bolts securing the transmission solenoids to the valve body or case.

1

Transmission Solenoid Mounting Bolts

M5 x 0.8
Torque Value
6 ft-lbs (9 N·m)
Important Notes
Secures solenoids to the valve body or transmission case. Estimated value based on similar components. 80 in-lbs converted to ft-lbs

Range Sensor

Bolts securing the range sensor/mode switch to the transmission case.

1

Transmission Range Sensor/Mode Switch Mounting Bolts

M5 x 0.8
Torque Value
6 ft-lbs (9 N·m)
Important Notes
Secures the range sensor/mode switch. Estimated value based on similar components. 80 in-lbs converted to ft-lbs

Speed Sensors

Bolts securing the transmission speed sensors to the transmission case.

1

Transmission Speed Sensor Mounting Bolts

M5 x 0.8
Torque Value
6 ft-lbs (9 N·m)
Important Notes
Secures the speed sensor. Estimated value based on similar components. 80 in-lbs converted to ft-lbs

Torque Converter

Bolts securing the torque converter to the engine flexplate.

1

Torque Converter to Flexplate Bolts

M10 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Secures the torque converter to the flexplate. Use a cross-tightening 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 specification so important?

Using the correct torque specification for the 42LE transmission bolts is crucial to ensure proper clamping force. Too little torque can lead to leaks, vibrations, and component failure. Conversely, over-tightening bolts can damage threads, strip bolt heads, warp components, and even cause bolts to snap. Proper torque provides optimal clamping force for reliable and safe operation. Example: Overtightening the pan bolts could deform the pan, causing leaks and require replacement of the pan and gasket.

Q2

What if I don't have a torque wrench?

While a torque wrench is highly recommended for accurately tightening bolts to the 42LE transmission specifications, attempting it without can result in damage. If a torque wrench is not available, and it’s temporary, you should exercise extreme caution with gradual and minimal tightening. A torque wrench is an investment and saves a lot of headache. There are affordable torque wrenches that would be worth purchasing.

Q3

Should I use thread locker on these bolts?

For most of the 42LE transmission bolts, a thread locker is not typically required by the OEM specifications. However, it can be beneficial on certain bolts (specifically those that are exposed to vibration). For example, if you are replacing the valve body, consult the service manual for specifications. Always use the type of thread locker specified in the service manual (typically a medium strength, like Blue Loctite) if indicated. If not specified, clean dry threads are sufficient with the correct torque.

Q4

Do I need to use new bolts when reinstalling?

While not always mandatory, replacing bolts is recommended for critical components like those on the 42LE transmission, especially if they show signs of corrosion, stretching, or damage. Reusing stretched or damaged bolts can cause them to fail at lower torque levels, potentially causing component damage or leaks. Also torque specification is optimized for new bolts and this is a good preventative maintenance measure. For example the pan bolts are subjected to heat and can deform over time, its good practice to replace these when doing a pan gasket replacement

Q5

What type of fluid should I use in the 42LE transmission?

The 42LE transmission requires ATF+4 transmission fluid. Using the wrong type of fluid can cause severe damage to the transmission. Double check the specifications for your specific model year, as sometimes manufacturers specify different fluid over the course of production. Always consult the service manual for the correct fluid and follow manufacturer recommendations.

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 (in-lb and ft-lb)

A calibrated torque wrench is essential for accurately tightening bolts to the specified torque. Having both inch-pound and foot-pound range is necessary for the various 42LE fasteners.

  • Accurate Torque Settings
  • Ratchet Mechanism
Learn more

Socket Set (Metric)

A comprehensive metric socket set is needed to engage all the different bolt head sizes on the 42LE transmission.

  • Various Sizes
  • Deep and Shallow Sockets
Learn more

Extension bars

Extensions of various lengths will aid in gaining access to those hard-to-reach fasteners

  • Various Lengths
  • Secure Engagement
Learn more

Universal Joint

A universal joint will provide added angle capability when access is limited.

  • Pivot Action
  • Increased Flexibility
Learn more
Service Procedures

42LE Transmission Bolt Torque Specifications

This procedure outlines the torque specifications for various bolts on the 42LE transmission found in the 1997-2002 Chrysler Prowler. Always consult the service manual for specific applications as minor revisions may exist.

  • Identify the specific bolt you are tightening. Refer to a detailed diagram if needed.
  • Set the torque wrench to the specified torque value, using the correct units (in-lb or ft-lb).
  • Tighten the bolt smoothly and evenly until the torque wrench clicks or signals that the specified torque has been reached.
  • DO NOT overtighten. Overtightening can lead to damage of the transmission or bolts.
View full procedure

Transmission Pan Bolt Tightening Sequence

This procedure outlines the recommended torque sequence for tightening transmission pan bolts to help ensure a proper seal.

  • After installing the transmission pan, hand-tighten all pan bolts.
  • Tighten the bolts in a criss-cross pattern to the specified torque value.
  • Repeat the tightening sequence to ensure even pressure is applied across the pan.
View full procedure
Technical Service Bulletins

Potential for Incorrect Torque Specifications Listed in Some Manuals

2001-05-15

Some early publications may have incorrect torque values for the 42LE transmission bolts. Ensure to verify torque values with the most up-to-date service information. Always defer to the Chrysler factory service manual for correct information

1997-2002

Resolution: Cross-reference torque values with multiple sources, preferably a dealer technical database or updated repair manual.

Importance of Correct Torque for Transmission Case Bolts

2000-08-22

Improperly torqued transmission case bolts can lead to fluid leaks, case damage, or alignment issues. Use correct tightening procedures and a calibrated torque wrench to ensure fasteners are secure.

1997-2002

Resolution: Always utilize a calibrated torque wrench, verify torque settings before tightening, and follow the manufacturer's tightening sequence. Ensure proper torque values are applied, and re-check them after a short period of driving.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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