Chrysler Pacifica 2017-present 845RE Transmission Transmission Torque Specifications & Bolt Torque Values
Chrysler Pacifica 2017-present

Chrysler Pacifica 2017-present 845RE Transmission Torque Specifications

Detailed torque specifications for re-transmission bolts on the 845RE transmission found in the 2017-Present Chrysler Pacifica. Includes various bolt locations and their respective torque values.

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

Specifications for bolts securing the transmission to the engine block and/or vehicle frame.

1

Transmission Mounting Bolts to Engine Block/Frame

M12 x 1.75
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Ensure proper alignment before tightening. Final torque should be applied in a star pattern to distribute pressure evenly.

Transmission Case

Specifications for bolts and plugs related to the transmission case and its components.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
Tighten bolts in a cross pattern to avoid distortion and ensure proper sealing. It's important to have a new gasket, ensuring proper sealing and preventing leaks. It is recommended to start from the center and work outwards.
2

Transmission Fluid Drain/Fill Plugs

M18 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Use new sealing washers to ensure a leak-free seal. Avoid over-tightening to prevent damage.
3

Transmission Fluid Level Check Plug

M12 x 1.5
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Use new sealing washers to ensure a leak-free seal. Avoid over-tightening to prevent damage.

Internal Components

Specifications for bolts securing components within the transmission housing.

1

Transmission Valve Body Bolts

M6 x 1.0
Torque Value
8.3 ft-lbs (11.3 N·m)
Important Notes
Tighten bolts in a cross pattern to ensure even pressure and prevent leaks.
2

Transmission Mechatronic Unit/TCM Bolts

M5 x 0.8
Torque Value
5.8 ft-lbs (8 N·m)
Important Notes
Tighten bolts in a cross pattern to ensure even pressure on the mechatronic unit and prevent damage.
3

Transmission Range Sensor Bolts

M5 x 0.8
Torque Value
5.8 ft-lbs (8 N·m)
Important Notes
Ensure sensor is properly aligned before tightening. Do not over-tighten to prevent damage.

External Components

Specifications for components external to the main transmission case.

1

Transmission Bellhousing Bolts to Engine Block

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the bellhousing is properly aligned before tightening to avoid any misalignment issues. Torque bolts evenly to prevent bellhousing stress.
2

Torque Converter Bolts to Flexplate

M10 x 1.25
Torque Value
38 ft-lbs (52 N·m)
Important Notes
Tighten bolts evenly in a star pattern to ensure proper alignment and prevent vibration.
3

Transmission Cooler Line Fittings

M16 x 1.5
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Use new o-rings to prevent leakage. Do not over-tighten to avoid damaging the fittings or threads.
4

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Value
65 ft-lbs (88 N·m)
Important Notes
Apply threadlocker if required by the manufacturer. Final torque should be applied in a star 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 for the 845RE transmission?

Using the correct torque specifications is critical for the 845RE transmission to ensure proper component clamping force, prevent leaks, and avoid damage. Overtightening can strip threads or deform components, leading to premature failure. Undertightening can cause loosening, leaks, and potential catastrophic failure. For example, incorrect torque on the valve body bolts can lead to internal leaks, affecting shift quality and performance.

Q2

What happens if I overtighten a bolt on the 845RE transmission?

Overtightening bolts on the 845RE transmission can lead to serious problems. You risk stripping the threads in the aluminum case, cracking the transmission housing, or damaging internal components like seals and gaskets. This could result in leaks, fluid loss, and potentially require a complete transmission rebuild or replacement. For instance, overtightening the pan bolts can deform the pan gasket, leading to leaks and loss of transmission fluid.

Q3

Can I reuse the bolts when reassembling the 845RE transmission?

While some bolts may be reusable, it is generally recommended to replace torque-to-yield (TTY) bolts as they are designed to stretch upon tightening and may not provide the correct clamping force upon reuse. For fasteners that are not TTY, inspect them carefully for damage or stretch. If in doubt, always replace critical fasteners, especially those involved in sealing or pressure-holding surfaces. An example is the valve body bolts - when removing and replacing them it is best practice to use new bolts.

Q4

What kind of torque wrench should I use for the 845RE transmission?

A calibrated torque wrench with the correct torque range is essential. For the 845RE, you'll likely need a range of torque settings, so both inch-pound and foot-pound torque wrenches are recommended. A digital torque wrench is preferable for greater accuracy but is not necessary for all jobs. For instance, the smaller bolts might require an inch-pound torque wrench, while larger bolts will require a foot-pound torque wrench.

Q5

Are there any specific bolt tightening sequences I should follow?

Yes, absolutely. Always follow the specified tightening sequence, typically a circular or diagonal pattern, provided by the manufacturer in the service manual. This ensures even pressure is applied across the mating surfaces. Ignoring the sequence can result in leaks or uneven clamping, which may damage gaskets. For example, when tightening the transmission pan bolts, it is imperative to use a star pattern tightening sequence to properly seal and secure the pan.

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 inch drive)

A calibrated torque wrench is essential for accurately tightening bolts to the specified torque values.

  • Wide torque range covering required specifications
  • Audible click or digital display for accurate readings
Learn more

Socket Set (Metric)

A set of metric sockets, including those for the transmission bolts, is required.

  • Deep sockets for accessing recessed bolts
  • Variety of sizes to accommodate all fasteners
Learn more

Extension Bars

Extension bars are needed to reach some of the transmission bolts.

  • Various lengths for different access points
  • Durable construction for reliable performance
Learn more
Service Procedures

845RE Transmission Bolt Torque Specifications (General)

This procedure outlines the general torque specifications for bolts on the 845RE transmission used in 2017-Present Chrysler Pacifica vehicles. Specific torque values will need to be checked against the repair manual to match the correct bolt type.

  • Identify the specific bolt location and size.
  • Consult the repair manual or a reliable service information source to find the specified torque value for the particular bolt.
  • Set the torque wrench to the specified value.
  • Tighten the bolt in the specified sequence if available in the manual.
  • Use a calibrated torque wrench to tighten the bolt until the desired torque is reached.
  • Re-check torque after all bolts are initially tightened.
View full procedure

845RE Transmission Pan Bolt Torque

This procedure outlines the specific torque procedure for the Transmission pan bolts on the 845RE transmission used in 2017-Present Chrysler Pacifica vehicles.

  • Clean and inspect threads.
  • Install and hand-tighten the pan bolts.
  • Tighten bolts in a crisscross pattern until snug.
  • Torque the bolts using specified torque value.
View full procedure
Technical Service Bulletins

Potential for Leaks at Transmission Case Seam (845RE)

2020-05-15

Some 845RE transmissions may exhibit leaks at the transmission case seam if not properly torqued during manufacturing or reassembly. Check the manual and/or any technical service bulletin for the most up-to-date torque procedure.

2017-2020 Chrysler Pacifica (potentially)

Resolution: Verify proper torque values are used when working with the transmission case. Ensure fasteners are installed correctly before tightening to avoid damage. Re-check if leaks are present.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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