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Transmission Cooling
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Gearbox Oil Cooler
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O-ring for gearbox oil cooler ATF. Porsche 996 / 986 / 987 / 987C / 997.1 ❭ 99970738840
O-ring for gearbox oil cooler ATF. Porsche 996 / 986 / 987 / 987C / 997.1 - 99970738840
99970738840/1
Vehicle Group
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- 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 996 TURBO 2000-05
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Information
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970738840
The product you are viewing cross references to these numbers
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970738840
99970738840
The product you are viewing cross references to these numbers
£4.15
Now £3.73
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