RAM Ram 5500 2016-present ZF 8HP Transmission Transmission Torque Specifications & Bolt Torque Values
RAM Ram 5500 2016-present

RAM Ram 5500 2016-present ZF 8HP Transmission Torque Specifications

Detailed torque specifications for the ZF-8HP transmission bolts in the 2016-Present Ram 5500, including transmission pan bolts, valve body bolts, and more.

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 and components that secure the transmission to the engine block or transmission crossmember, ensuring proper alignment and preventing movement.

1

Transmission Mounting Bolts

M10 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Ensure proper alignment of the transmission before tightening.

Oil Pan

Bolts and components that secure the oil pan to the transmission case, ensuring a leak-free seal and proper lubrication.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
Use a torque wrench to avoid over-tightening and damaging the oil pan.

Fluid Plugs

Plugs and fittings that allow for the draining and filling of transmission fluid, ensuring proper lubrication and cooling.

1

Transmission Drain Plug

M12 x 1.75
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Ensure the drain plug is properly seated before tightening.
2

Transmission Fill Plug

M12 x 1.75
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Ensure the fill plug is properly seated before tightening.

Transmission Case

Bolts that secure the transmission case to the engine block or bellhousing, ensuring structural integrity and alignment.

1

Transmission Case Bolts

M12 x 1.75
Torque Value
70 ft-lbs (95 N·m)
Important Notes
Estimated value based on similar bolt sizes and applications.

Valve Body

Bolts that secure the valve body to the transmission case, ensuring proper hydraulic control and preventing internal leaks.

1

Valve Body Bolts

M8 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on similar bolt sizes and applications.

Torque Converter

Bolts that secure the torque converter to the transmission case, ensuring proper engagement and disengagement of the converter clutch.

1

Torque Converter Bolts

M10 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on similar bolt sizes and applications.

Cooler Lines

Fittings that connect the transmission cooler lines to the transmission case or cooler, ensuring proper cooling and preventing leaks.

1

Transmission Cooler Line Fittings

M12 x 1.75
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on similar fitting sizes and applications.

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 recommended torque specification for the zf-8hp-transmission bolts on my 2016-Present Ram 5500?

The recommended torque specification for the zf-8hp-transmission bolts on your 2016-Present Ram 5500 is 30 ft-lbs (40 Nm) for the transmission pan bolts and 50 ft-lbs (67 Nm) for the transmission case bolts. It's essential to consult your owner's manual or a repair manual for specific torque values, as over-torquing can damage the transmission.

Q2

How often should I check the transmission fluid level and condition?

It's recommended to check the transmission fluid level and condition every 5,000 to 7,500 miles (8,000 to 12,000 km). Low fluid levels or dirty fluid can cause premature wear on the transmission components, leading to costly repairs. Always refer to your owner's manual for the recommended maintenance schedule.

Q3

Can I use a torque wrench with a socket extension to tighten the transmission bolts?

Yes, you can use a torque wrench with a socket extension to tighten the transmission bolts, but make sure the extension is securely attached to the torque wrench and the socket is properly seated on the bolt head. This will ensure accurate torque readings and prevent damage to the transmission or surrounding components.

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 high-precision torque wrench for accurate bolt tightening

  • Digital display
  • Adjustable torque range
Learn more

Socket Set

A comprehensive socket set for accessing transmission bolts

  • Metric and SAE sizes
  • Ratchet and extension included
Learn more

Breaker Bar

A long, flexible bar for applying extra torque to stubborn bolts

  • High-strength steel construction
  • Comfort grip handle
Learn more
Service Procedures

ZF-8HP Transmission Pan Bolt Torque Specification

Procedure for tightening transmission pan bolts to the correct torque specification

  • Remove transmission pan and filter
  • Clean and inspect pan and filter
  • Apply new gasket sealant to pan
  • Tighten pan bolts in a star pattern to 30 ft-lbs (40 Nm)
  • Tighten pan bolts an additional 1/4 turn
View full procedure

ZF-8HP Transmission Filter Replacement

Procedure for replacing the transmission filter

  • Locate and remove filter
  • Inspect and clean filter housing
  • Install new filter
  • Tighten filter housing to 10 ft-lbs (14 Nm)
View full procedure
Technical Service Bulletins

ZF-8HP Transmission Pan Bolt Torque Specification Update

2020-02-15

Update to the transmission pan bolt torque specification to prevent over-tightening

2016-2020 Ram 5500

Resolution: Tighten pan bolts to 30 ft-lbs (40 Nm) and an additional 1/4 turn

ZF-8HP Transmission Filter Clogging Issue

2019-05-01

Issue with transmission filter clogging due to incorrect filter installation

2016-2019 Ram 5500

Resolution: Inspect and clean filter housing, install new filter, and tighten filter housing to 10 ft-lbs (14 Nm)

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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