Gearbox Oil Cooler

Bonded Rubber Bush M6 20x20 – Multi-Application Mounting Bush
Sold each

High-quality bonded rubber bush M6 20x20 designed for a wide range of Porsche models including 986 Boxster, 996, 964, 968, and 928.

This versatile mounting bush is used in multiple engine bay and chassis applications, including air pump mounting (986 Boxster and 996), gearbox oil cooler mounting (928), and fuel filter mounting (964 and 968).

Fits:

• Porsche Boxster 986 2.5L 1997-99
• Porsche Boxster 986 2.7L 1999-02
• Porsche Boxster S 986 3.2L 1999-02
• Porsche 964 (911) C2  Speedster 1993
• Porsche 964 (911) C4 Speedster 1993
• Porsche 996 C2 3.4L 1997-08/01
• Porsche 996 C4 3.4L 1997-08/01
• Porsche 996 C2 3.6L 09/01-2005
• Porsche 996 C4 3.6L 09/01-2005
• Porsche 996 C4S 3.6L 09/01-2005
• Porsche 968 3.0L 1992-94
• Porsche 968 Sport 3.0L 1994-95
• Porsche 968 CS 3.0L 1993-95
• Porsche 968 Turbo S 3.0L 1993-94
• Porsche 928 GTS 5.4L 1992-95

Diagram ref no 3  

Manufactured to OEM specifications, this bonded rubber mount provides excellent vibration isolation while ensuring secure positioning of critical components.

Key Features

• Bonded rubber bush M6 20x20
• Suitable for Porsche 986, 996, 964, 968, and 928
• Multi-application mounting solution
• Used for air pump, gearbox cooler, and fuel filter
• Reduces vibration and movement
• Durable rubber-metal bonded construction
• OEM-style fit and performance

Function and Purpose

This bush is designed to support and isolate mounted components.

It helps to:
• Secure components in position
• Absorb engine and drivetrain vibration
• Protect sensitive parts from stress and fatigue
• Maintain correct alignment
• Improve overall system reliability

Why Replace Rubber Mounting Bushes

Rubber components degrade over time due to heat and exposure.

Common issues include:
• Cracked or perished rubber
• Excessive movement or looseness
• Increased vibration transfer
• Potential damage to mounted components

Replacing worn bushes restores stability and prolongs component life.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99970346500

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Bonded Rubber Bush M6 20x20 – Multi-Application Mounting Bush
Sold each

High-quality bonded rubber bush M6 20x20 designed for a wide range of Porsche models including 986 Boxster, 996, 964, 968, and 928.

This versatile mounting bush is used in multiple engine bay and chassis applications, including air pump mounting (986 Boxster and 996), gearbox oil cooler mounting (928), and fuel filter mounting (964 and 968).

Fits:

• Porsche Boxster 986 2.5L 1997-99
• Porsche Boxster 986 2.7L 1999-02
• Porsche Boxster S 986 3.2L 1999-02
• Porsche 964 (911) C2  Speedster 1993
• Porsche 964 (911) C4 Speedster 1993
• Porsche 996 C2 3.4L 1997-08/01
• Porsche 996 C4 3.4L 1997-08/01
• Porsche 996 C2 3.6L 09/01-2005
• Porsche 996 C4 3.6L 09/01-2005
• Porsche 996 C4S 3.6L 09/01-2005
• Porsche 968 3.0L 1992-94
• Porsche 968 Sport 3.0L 1994-95
• Porsche 968 CS 3.0L 1993-95
• Porsche 968 Turbo S 3.0L 1993-94
• Porsche 928 GTS 5.4L 1992-95

Diagram ref no 3  

Manufactured to OEM specifications, this bonded rubber mount provides excellent vibration isolation while ensuring secure positioning of critical components.

Key Features

• Bonded rubber bush M6 20x20
• Suitable for Porsche 986, 996, 964, 968, and 928
• Multi-application mounting solution
• Used for air pump, gearbox cooler, and fuel filter
• Reduces vibration and movement
• Durable rubber-metal bonded construction
• OEM-style fit and performance

Function and Purpose

This bush is designed to support and isolate mounted components.

It helps to:
• Secure components in position
• Absorb engine and drivetrain vibration
• Protect sensitive parts from stress and fatigue
• Maintain correct alignment
• Improve overall system reliability

Why Replace Rubber Mounting Bushes

Rubber components degrade over time due to heat and exposure.

Common issues include:
• Cracked or perished rubber
• Excessive movement or looseness
• Increased vibration transfer
• Potential damage to mounted components

Replacing worn bushes restores stability and prolongs component life.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99970346500

The product you are viewing cross references to these numbers

Gearbox oil cooler AFT basic plate. 18.64 x 3.53

Fits:
Porsche 996 (911) Carrera 2 (1998 - 2001)
Porsche 996 (911) Carrera 4 (1999 - 2001)
Porsche 996 (911) Turbo (2001 - 2001)
Porsche 996 (911) GT3 (1999 - 2001)
Porsche 996 (911) GT2 (2001 - 2001)
Additional information: Only in combination with Tiptronic.

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Diagram ref no 1.

Related reference numbers
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99630702001

The product you are viewing cross references to these numbers

Gearbox oil cooler AFT.

Fits:
Porsche 996 C2 / C4 2002>> Tiptronic
Porsche 996 TURBO Tiptronic
Porsche 997 C2 / C4 2005>> Tiptronic
Porsche 997 TURBO Tiptronic

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Diagram ref no 1.

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7222700495

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Gearbox oil cooler AFT. with O-rings.

Fits:
Porsche 996 C2 / C4 2002>> Tiptronic
Porsche 996 TURBO Tiptronic
Porsche 997 C2 / C4 2005>> Tiptronic
Porsche 997 TURBO Tiptronic

Diagram ref no 1.

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7222700495

The product you are viewing cross references to these numbers

Gearbox oil cooler AFT.

Fits:
Porsche 986 Boxster 1997-04 Tiptronic
Porsche 987 Boxster 2005-07 Tiptronic
Porsche 987C Cayman 2007-08 Tiptronic
Porsche 996 C2 / C4 >>2001 Tiptronic

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Diagram ref no 1.

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99630701701

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Gearbox oil cooler ATF.
Larger than standard. 15% larger than the original for better cooling.

Fits:
Porsche 986 Boxster 1997-04 Tiptronic
Porsche 987 Boxster 2005-07 Tiptronic
Porsche 987C Cayman 2007-08 Tiptronic
Porsche 996 C2 / C4 >>2001 Tiptronic

Diagram ref no 1.

The installation of a larger gearbox oil cooler for the Porsche 996, specifically for the Automatic Transmission Fluid (ATF), offers several significant benefits:

Enhanced Cooling Efficiency: A larger oil cooler increases the cooling capacity, allowing the ATF to dissipate heat more effectively. As a result, the transmission can operate at lower temperatures, preventing overheating and reducing the risk of fluid breakdown and premature wear on transmission components.

Extended Transmission Life: Lower operating temperatures due to improved cooling help prolong the lifespan of the transmission. Cooler ATF ensures that the internal components experience less stress and thermal degradation, contributing to a longer-lasting and more reliable gearbox.

Improved Performance: Optimal transmission temperature is essential for consistent and smooth gear shifts. With a larger oil cooler, the ATF maintains its viscosity and performance characteristics, promoting seamless gear changes and overall improved transmission performance.

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99630701701

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Gearbox oil cooler ATF
OE Match gearbox oil cooler for selected Porsche 986 Boxster, 987 Boxster, 987C Cayman and 996 models fitted with Tiptronic transmission. This replacement ATF cooler helps regulate automatic transmission fluid temperature, supporting consistent gearbox performance and protecting the transmission from excessive heat.


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99630701701

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PDK Gearbox Oil Cooler 

The PDK Gearbox Oil Cooler is a replacement heat exchanger designed to regulate transmission oil temperature in Porsche Boxster and Cayman models fitted with the PDK dual-clutch gearbox.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Boxster 981 2.7L 2012-16
• Porsche Boxster 981 S / GTS 3.4L 2012-16
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12
• Porsche Cayman 2.7L 981 2013-16
• Porsche Cayman S / GTS 3.4L 981 2013-16
• Porsche Cayman 718 2.0L PDK (300 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)

Diagram Ref No 25

It transfers excess heat from the gearbox oil to the vehicle's cooling system, helping maintain consistent transmission performance and protect internal components against overheating.

What Does It Do?

The gearbox oil cooler helps remove heat generated during PDK operation.

By transferring heat from the transmission oil to the engine cooling circuit, it helps maintain the correct operating temperature for reliable gearbox lubrication and performance.

Why Is It Important?

The Porsche PDK gearbox relies on controlled oil temperatures for efficient operation.

Excessive transmission heat can contribute to:

• Reduced gearbox performance
• Deterioration of transmission oil
• Increased internal component wear
• Gearbox overheating warnings
• Premature transmission damage

A correctly functioning oil cooler helps maintain stable operating temperatures.

Why Does It Fail?

Common causes of gearbox oil cooler failure include:

• Internal corrosion or deterioration
• Blocked coolant or oil passages
• Age-related damage
• Leaking seals or connections
• Internal heat exchanger failure

These problems can reduce cooling efficiency or allow fluid leakage.

When Should It Be Replaced?

Replace the gearbox oil cooler if:

• The heat exchanger is leaking
• Transmission temperatures are consistently excessive
• Cooling performance has deteriorated
• Internal oil and coolant contamination is confirmed
• The cooler is damaged during gearbox repairs

Always diagnose the cooling system and transmission before replacing the cooler.

Checks & Installation

Inspect the connecting oil pipes, coolant hoses and sealing rings before installation.

Replace damaged seals and follow Porsche workshop procedures when refilling and bleeding the cooling system.

Check the correct PDK oil level and inspect for leaks after installation.

Key Features

• Designed for selected Porsche 987.2, 981 and 718 models
• Helps regulate transmission oil temperature
• Transfers excess heat to the cooling system
• Supports reliable PDK gearbox operation
• Helps protect transmission components from overheating
• Replacement for leaking or damaged oil coolers
• Suitable for gearbox cooling system repairs

Porsche Boxster & Cayman PDK Gearbox Oil Coolers

Maintaining the correct gearbox oil temperature is essential for reliable Porsche PDK transmission operation.

The 9G230701700 gearbox oil cooler helps regulate transmission temperature in selected Porsche 987.2, 981 and 718 Boxster and Cayman models, protecting internal components against excessive heat.

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9G230701700

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PDK Gearbox Oil Cooler 

The OE Match PDK Gearbox Oil Cooler is a replacement heat exchanger designed to regulate transmission oil temperature in Porsche Boxster and Cayman models fitted with the PDK dual-clutch gearbox.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Boxster 981 2.7L 2012-16
• Porsche Boxster 981 S / GTS 3.4L 2012-16
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12
• Porsche Cayman 2.7L 981 2013-16
• Porsche Cayman S / GTS 3.4L 981 2013-16
• Porsche Cayman 718 2.0L PDK (300 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)

Diagram Ref No 25

It transfers excess heat from the gearbox oil to the vehicle's cooling system, helping maintain consistent transmission performance and protect internal components against overheating.

What Does It Do?

The gearbox oil cooler helps remove heat generated during PDK operation.

By transferring heat from the transmission oil to the engine cooling circuit, it helps maintain the correct operating temperature for reliable gearbox lubrication and performance.

Why Is It Important?

The Porsche PDK gearbox relies on controlled oil temperatures for efficient operation.

Excessive transmission heat can contribute to:

• Reduced gearbox performance
• Deterioration of transmission oil
• Increased internal component wear
• Gearbox overheating warnings
• Premature transmission damage

A correctly functioning oil cooler helps maintain stable operating temperatures.

Why Does It Fail?

Common causes of gearbox oil cooler failure include:

• Internal corrosion or deterioration
• Blocked coolant or oil passages
• Age-related damage
• Leaking seals or connections
• Internal heat exchanger failure

These problems can reduce cooling efficiency or allow fluid leakage.

When Should It Be Replaced?

Replace the gearbox oil cooler if:

• The heat exchanger is leaking
• Transmission temperatures are consistently excessive
• Cooling performance has deteriorated
• Internal oil and coolant contamination is confirmed
• The cooler is damaged during gearbox repairs

Always diagnose the cooling system and transmission before replacing the cooler.

Checks & Installation

Inspect the connecting oil pipes, coolant hoses and sealing rings before installation.

Replace damaged seals and follow Porsche workshop procedures when refilling and bleeding the cooling system.

Check the correct PDK oil level and inspect for leaks after installation.

Key Features

• OE Match PDK gearbox oil cooler
• Porsche reference 9G230701700
• Designed for selected Porsche 987.2, 981 and 718 models
• Helps regulate transmission oil temperature
• Transfers excess heat to the cooling system
• Supports reliable PDK gearbox operation
• Helps protect transmission components from overheating
• Replacement for leaking or damaged oil coolers
• Suitable for gearbox cooling system repairs

Porsche Boxster & Cayman PDK Gearbox Oil Coolers

Maintaining the correct gearbox oil temperature is essential for reliable Porsche PDK transmission operation.

The OE Match gearbox oil cooler helps regulate transmission temperature in selected Porsche 987.2, 981 and 718 Boxster and Cayman models, protecting internal components against excessive heat.

Related reference numbers
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9G230701700

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Mounting plate for Tiptronic gearbox heat exchanger.

Fits:
Porsche 986 Boxster 1997-04 Tiptronic (A8600 / A8605 / A8620)
Porsche 987.1 Boxster 2005-08 Tiptronic
Porsche 987C.1 Cayman 2006-08 Tiptronic (A8702 / A8721)

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Diagram ref no 5

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98630702000

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O-ring for gearbox oil cooler ATF
This Porsche Genuine OE O-Ring for Gearbox Oil Cooler ATF is a precision-engineered sealing ring used within the automatic (Tiptronic) transmission cooling system. This small but critical component provides a fluid-tight seal between the gearbox oil cooler and connecting pipework.
Sold individually

Fits:
Porsche 986 Boxster 1997 - 2004 Tiptronic
Porsche 987.1 Boxster 2005 - 2007 Tiptronic
Porsche 987C.1 Cayman 2007 - 2008 Tiptronic
Porsche 996 C2 / C4  / Turbo 1998 - 2005 Tiptronic
Porsche 997.1 C2 / C4  2005 - 2008 Tiptronic

Diagram ref no 2

Manufactured to Porsche OE standards, it ensures correct dimensions, material quality, and resistance to ATF (automatic transmission fluid), heat, and pressure.

This O-ring seals the junction between the gearbox oil cooler (heat exchanger) and its associated pipes, preventing ATF leaks and maintaining correct system pressure. By ensuring a secure seal, it allows the transmission fluid to circulate properly through the cooler, helping regulate temperature and maintain optimal gearbox performance.

Functions & Technical Role
•  Fluid sealing: Prevents ATF leaks at oil cooler connections
•  Pressure retention: Maintains correct hydraulic pressure within the system
•  Thermal resistance: Designed to withstand high transmission temperatures
•  System protection: Prevents contamination and air ingress
•  OEM precision fit: Exact size and material specification for Porsche applications

Fitment / Position on car
•  Fitting position: Transmission cooling system
•  Location: Between gearbox oil cooler (ATF heat exchanger) and fluid pipes
•  System: Automatic transmission (Tiptronic) lubrication and cooling

Although small, O-rings are critical wear items exposed to heat cycles, pressure, and fluid degradation. Over time they can harden, shrink, or crack, leading to:
•  ATF leaks around the gearbox oil cooler
•  Loss of transmission fluid and pressure
•  Overheating of the gearbox
•  Potential transmission damage

Replacing with a genuine Porsche OE O-ring ensures proper sealing, reliability, and long-term protection of the transmission system.

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99970738840

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O-ring for gearbox oil cooler ATF, 18.64 x 3.53 mm
An OE Match O-ring seal designed for the automatic transmission (Tiptronic) oil cooler system, ensuring a tight, leak-free connection between the gearbox oil cooler and fluid lines.
Sold individually

Fits:
Porsche 986 Boxster 1997 - 2004 Tiptronic
Porsche 987.1 Boxster 2005 - 2007 Tiptronic
Porsche 987C.1 Cayman 2007 - 2008 Tiptronic
Porsche 996 C2 / C4  / Turbo 1998 - 2005 Tiptronic
Porsche 997.1 C2 / C4  2005 - 2008 Tiptronic

Diagram ref no 2

This OE Match O-Ring for Gearbox Oil Cooler ATF is a precision-engineered sealing component designed to meet original Porsche specifications for fit, durability, and performance. This O-ring is used within the automatic transmission oil cooler system, where it forms a critical seal between the cooler and associated fluid lines.

Despite its small size, this O-ring plays a vital role in maintaining the integrity of the transmission cooling circuit. It prevents leaks of automatic transmission fluid (ATF), ensuring proper lubrication and temperature regulation of the gearbox. Without an effective seal, fluid loss can occur, potentially leading to overheating, reduced lubrication, and long-term transmission damage.

Manufactured from high-quality heat- and fluid-resistant rubber, the O-ring is designed to withstand the demanding conditions of the transmission system, including exposure to high temperatures, pressure, and aggressive fluids. It is a direct replacement for original parts and ensures reliable sealing performance in both maintenance and repair applications.

This component is commonly used on Tiptronic-equipped Porsche models, making it an essential part during transmission servicing or oil cooler replacement.

Function
• Provides a tight seal for gearbox oil cooler connections
•   Prevents ATF leaks and pressure loss
•   Maintains proper transmission cooling efficiency
•   Protects against fluid contamination and air ingress
•   Ensures reliable long-term sealing under heat and pressure

O-rings degrade over time due to heat, pressure, and exposure to transmission fluid. A worn or hardened seal can lead to ATF leaks, which may result in overheating, poor shifting performance, or serious transmission damage.

Replacing this O-ring during servicing ensures a proper seal and helps maintain the reliability and longevity of the transmission system.

When to replace
•  During gearbox or oil cooler servicing
•  Visible ATF leaks around cooler or lines
•  O-ring appears cracked, flattened, or hardened
•  Preventative replacement during transmission maintenance
•  When removing or reinstalling cooler lines

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99970738840

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O-ring PDK gearbox oil cooler pipe 12,25 x 2,5

Sold each - 4 required per car

Fits:
Porsche 987.2 Boxster - 2009 to 2012
Porsche 987.2 Cayman - 2009 to 2012
Porsche 981 Boxster - 2012 to 2016
Porsche 981 Cayman - 2013 to 2016
Porsche 718 Boxster - 2017 Onwards

Porsche 718 Cayman  - 2017 Onwards

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Diagram ref no 30

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9P1301185A

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Retaining bracket plate PDK gearbox oil cooler. 

Fits:
Porsche 987.2 Boxster - 2009 to 2012
Porsche 987.2 Cayman - 2009 to 2012
Porsche 981 Boxster - 2012 to 2016
Porsche 981 Cayman - 2013 to 2016
Porsche 718 Boxster - 2017 Onwards

Porsche 718 Cayman  - 2017 Onwards

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Diagram ref no 31

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9G230725500

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Water Line Supply, Coolant Pipe.

The Porsche Water Line Supply, Coolant Pipe 98630707622 is a genuine Porsche coolant supply line used within the Tiptronic automatic-transmission cooling circuit on selected Porsche Boxster and Cayman applications.

Fits:

• Porsche Boxster 987 2.7L 2007/08
• Porsche Boxster 987 S 3.2/3.4L 2007/08
• Porsche Cayman 2.7L 987C 2007-08
• Porsche Cayman S 3.4L 987C 2007-08  

Diagram Ref No 6

The pipe carries engine coolant to the automatic transmission fluid cooler, where coolant helps regulate the operating temperature of the transmission oil.

Maintaining this pipe in good condition is important because the Tiptronic transmission relies on effective thermal management to keep transmission-fluid temperatures within the correct operating range.

As a Genuine Porsche component, the pipe provides the correct factory dimensions, routing and connections for the intended installation.

What This Product Does:
The coolant supply line forms part of the water-to-oil cooling circuit for the Tiptronic transmission.

Its primary functions include:

• Carrying engine coolant to the ATF cooler
• Supporting regulation of automatic-transmission fluid temperature
• Maintaining coolant circulation through the transmission cooler
• Helping prevent excessive transmission-fluid temperatures
• Maintaining a sealed cooling circuit
• Supporting correct Tiptronic transmission operation
• Providing the original factory coolant routing
• Preventing coolant loss when correctly installed and sealed

The pipe works alongside the ATF cooler, coolant return line, transmission oil supply and return lines, hoses and associated valves.

Symptoms Of Wear Or Failure:
Coolant pipes can deteriorate through age, corrosion, vibration and repeated heating and cooling cycles.

Common signs of a failing coolant supply pipe include:

• Visible coolant leakage
• Wetness around the pipe or connections
• Pink or white dried coolant deposits
• Falling engine coolant level
• Frequent need to top up coolant
• Low coolant warning
• Sweet coolant smell
• Corrosion or pitting on the pipe
• Damaged pipe connections
• Leakage around seals or hose joints
• Distorted or bent pipework
• Loss of cooling-system pressure
• Higher transmission operating temperatures
• Transmission overheating warnings in severe cases

Small leaks may only become visible once the vehicle is fully warm and the cooling system is pressurised.

Why Replacement Matters:
A leaking coolant supply line can affect both the engine cooling system and the transmission cooling circuit.

Coolant loss can reduce system pressure and circulation, while insufficient coolant flow through the ATF cooler can reduce its ability to control transmission-fluid temperature.

Continued operation with a damaged line can contribute to:

• Coolant loss
• Cooling-system pressure loss
• Reduced ATF cooling efficiency
• Elevated transmission-fluid temperature
• Accelerated transmission-fluid deterioration
• Increased wear within the automatic transmission
• Engine overheating if coolant loss becomes significant
• Roadside breakdown

Replacing the damaged pipe helps restore a sealed cooling circuit and reliable coolant flow through the transmission cooler.

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98630707623

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