BMW M6 2005-2010 Getrag Transmission Transmission Torque Specifications & Bolt Torque Values
BMW M6 2005-2010

BMW M6 2005-2010 Getrag Transmission Torque Specifications

Detailed torque specifications for all bolts related to the Getrag manual transmission in the 2005-2010 BMW M6 (E63/E64). Includes bellhousing, pan, and other relevant fasteners.

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

These specifications are for bolts securing the transmission housing to the vehicle's chassis or subframe. Proper torque ensures secure mounting, preventing vibrations and potential damage.

1

Transmission Mounting Bolts

M12 x 1.75
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Ensure bolts are tightened evenly. Always double-check against the specific repair manual for your vehicle.

Transmission Oil Pan

These specifications are for bolts securing the transmission oil pan to the transmission housing. Proper torque is critical to prevent leaks and ensure a proper seal.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten bolts in a criss-cross pattern to ensure even pressure on the gasket. Over-tightening can deform the pan and cause leaks.

Drain Fill Plugs

These specifications are for the drain and fill plugs used for servicing the transmission fluid. Correct torque ensures a proper seal and prevents leaks.

1

Transmission Drain/Fill Plugs

M22 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Always use a new crush washer when installing drain and fill plugs to ensure a proper seal. Avoid over-tightening.

Drive Axle Bolts

These specifications are for the bolts connecting the drive axles/half shafts to the transmission output flanges. Correct torque is crucial for proper power transfer.

1

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Value
75 ft-lbs (100 N·m)
Important Notes
Ensure bolts are tightened evenly. Under-torquing can cause bolts to loosen, and over-torquing can cause bolt failure.

Propeller Shaft Bolts

These specifications are for the bolts connecting the propeller shaft (driveshaft) to the transmission output flange. Correct torque is essential to prevent vibration and damage.

1

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Tighten bolts evenly to prevent imbalance. Always check for proper driveshaft alignment after installation.

Input Shaft Bolts

These specifications are for the bolts connecting the transmission to the engine's flywheel or flexplate. Proper torque is crucial to ensure alignment and prevent damage.

1

Transmission Input Shaft Bolts

M10 x 1.5
Torque Value
60 ft-lbs (80 N·m)
Important Notes
These bolts should be tightened in a star pattern to ensure even pressure. Improper torque can lead to misalignment and damage. Value is estimated, consult repair manual for confirmation.

Bellhousing Bolts

These specifications are for the bolts securing the bell housing to the engine block. Proper torque ensures alignment and prevents leaks.

1

Transmission Bellhousing Bolts

M12 x 1.75
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Tighten bolts evenly. Ensure proper alignment before torquing. Value is estimated, consult repair manual for confirmation.

Clutch Slave Cylinder Bolts

These specifications are for the bolts securing the clutch slave cylinder to the bell housing. Correct torque is necessary for proper clutch operation.

1

Clutch Slave Cylinder Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the slave cylinder is properly positioned before torquing the bolts. Avoid over-tightening which could damage the cylinder. Value is estimated, consult repair manual for confirmation.

Shift Linkage Bolts

These specifications are for the bolts connecting the shift linkage (rods, cables) to the transmission. Proper torque ensures precise gear changes.

1

Shift Linkage Bolts

M6 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure all linkage components are properly aligned before torquing the bolts. Value is estimated, consult repair manual for confirmation.

Reverse Light Switch Bolts

These specifications are for the bolts securing the reverse light switch to the transmission. Correct torque prevents leaks and ensures the switch functions correctly.

1

Reverse Light Switch Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Do not over-tighten, as this can damage the sensor or cause leaks. Value is estimated, consult repair manual for confirmation.

Fluid Cooler Line Bolts

These specifications are for the bolts securing the transmission fluid cooler lines. Proper torque prevents fluid leaks.

1

Transmission Fluid Cooler Line Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure all fittings are properly aligned before tightening. Over-tightening can damage fittings. Value is estimated, consult repair manual for confirmation.

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 are torque specifications so important when working on the Getrag transmission?

Precise torque specifications are crucial for the Getrag transmission to ensure proper clamping force on components like the bell housing, transmission case, and output flange. Under-tightening can lead to leaks, loosening of bolts, and potential component failure due to insufficient clamping. Over-tightening can deform components, strip threads, or lead to fracture of the bolts. Either situation can result in costly repairs or even catastrophic transmission damage. For example, a slightly under-torqued bell housing bolt might cause a slow oil leak that, if left unchecked, could lead to transmission damage due to low fluid levels.

Q2

What type of lubricant should be used on the threads of the Getrag transmission bolts?

Generally, it's best to use a thread lubricant or anti-seize compound on Getrag transmission bolts, especially those that are in direct contact with aluminum. This prevents corrosion and facilitates easier removal in the future. However, always refer to the specific repair manual for your 2005-2010 BMW M6. Some bolts may come with a pre-applied locking compound. For example, bolts securing the transmission case halves might benefit from anti-seize as these can be exposed to water and heat, leading to corrosion. If a bolt is pre-coated with thread locker, you should either use a new bolt or apply the equivalent specified thread locker (e.g., Loctite 243) during reassembly.

Q3

Can I reuse the Getrag transmission bolts, or should they be replaced?

It's best practice to replace any torque-to-yield bolts on the Getrag transmission. Torque-to-yield bolts are designed to stretch when tightened and can't provide the same clamping force if reused. Other bolts, especially those that are visibly damaged or corroded, should also be replaced. Bolts securing the flywheel and clutch assembly in particular are critical, and reuse is generally not advised. Reusing bolts might save you money initially but could compromise the integrity and performance of the transmission.

Q4

What are the common signs of over-tightening transmission bolts?

Signs of over-tightening include a 'creaking' or 'snapping' sound during tightening, a bolt head that appears to be sinking into the material, or a feeling of resistance after reaching the specified torque. Over-tightening can cause threads to strip or the bolt to break, requiring extensive repairs. Another common indicator is when the surrounding material begins to show signs of cracking. For example, if you over-tighten the bolts securing the transmission oil pan, you may notice a small crack in the pan housing after the fact.

Q5

Do torque specifications change if I'm using a different type of bolt (e.g., aftermarket)?

Yes, absolutely. The torque specifications in the BMW repair manual are for OEM bolts. If using aftermarket bolts, refer to the manufacturer's torque specification for those specific bolts. The material strength, thread pitch, and lubrication used on the aftermarket bolts might be different from the original equipment, resulting in inaccurate clamping if the original torque specification is used. For example, using an aftermarket bolt with a higher tensile strength, you should verify with the bolt manufacturer on a new torque specification.

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 torque wrench capable of measuring torque values from 10 Nm to 150 Nm, necessary for accurate tightening of transmission bolts.

  • 1/2" drive size for compatibility with sockets
  • Wide torque range for various applications
  • Audible click to indicate achieved torque
Learn more

Torque Wrench (3/8" drive)

A calibrated torque wrench capable of measuring torque values from 5 Nm to 50 Nm, used for lower torque fasteners on the transmission.

  • 3/8" drive size for access to smaller fasteners
  • Fine torque adjustment for delicate work
  • Easy to read torque scale
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets covering sizes from 8mm to 19mm, required for different bolts on the Getrag transmission.

  • Metric socket sizes for all transmission bolts
  • Durable chrome vanadium steel construction
  • Organized case for easy access
Learn more

Various Extensions

A selection of extensions in 3/8" and 1/2" drive sizes will aid access to transmission bolts, particularly those located deep within the engine bay.

  • Variety of lengths for added reach
  • Secure connection to sockets and wrenches
  • Durable materials
Learn more

Universal Joint

A universal joint helps get around obstructions and reach bolts at awkward angles.

  • Provides angular movement for socket placement
  • Durable construction for reliable use
  • Allows for torquing in difficult locations
Learn more
Service Procedures

Transmission Bellhousing Bolt Torque Procedure

Detailed procedure for tightening the bellhousing bolts on the Getrag transmission. This ensures proper alignment and sealing of the transmission to the engine.

  • Locate all bellhousing bolts.
  • Using a clean socket, hand-tighten all bolts in a star pattern.
  • Set the torque wrench to the specified value for bellhousing bolts (typically 45 Nm).
  • Torque all bolts in the same star pattern using the torque wrench.
  • Recheck the torque value on all bolts after completion.
View full procedure

Transmission Pan Bolt Torque Procedure

Procedure for torquing the transmission pan bolts, critical to prevent fluid leaks. Proper tightening ensures a good seal between the pan and the transmission casing.

  • Clean the transmission pan and mating surface.
  • Install a new transmission pan gasket.
  • Install the transmission pan and start all bolts by hand.
  • Set torque wrench to the specified value for transmission pan bolts (typically 15 Nm).
  • Tighten all the bolts using the torque wrench in a cross-pattern.
  • Recheck the torque value on all bolts after completion.
View full procedure

Transmission Mount Bolt Torque Procedure

Procedure for torquing the transmission mount bolts. Correct torque values are necessary to reduce vibrations and ensure that the drivetrain is properly mounted.

  • Locate all transmission mount bolts.
  • Using a clean socket, hand-tighten all bolts.
  • Set the torque wrench to the specified value for mount bolts (typically 60 Nm).
  • Tighten all bolts with the torque wrench.
  • Recheck the torque value on all bolts after completion.
View full procedure
Technical Service Bulletins

Getrag Transmission Bolt Inspection and Torque Verification

2008-06-15

This bulletin addresses concerns about potential loosening of transmission bolts over time due to heat and vibration. It details a mandatory inspection and re-torquing procedure for affected vehicles.

2005-2008 BMW M6

Resolution: Inspect all transmission bellhousing, pan and mount bolts for proper torque specification and tighten as needed.

Revised Torque Specification for Transmission Pan Bolts

2009-03-20

This bulletin outlines a revised torque specification for the transmission pan bolts to prevent fluid leaks experienced under hard driving conditions.

2005-2010 BMW M6

Resolution: Apply updated torque specification of 15 Nm to all transmission pan bolts when performing service or repairs.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

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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