Driveshaft Flange
Joint flange. Porsche 987.1 Boxster / 987C.1 Cayman
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 997 MK1 TURBO 2007-09
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08

Fits:
For cars with 6-speed manual transmission
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2005-08
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
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98733220900
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Round Seal For Flanged Shaft, (Tiptronic Transmission). Porsche 986 / 987 / 996 1998-08
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- 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 Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
The Porsche Round Seal for Flanged Shaft is a genuine OEM component engineered for vehicles equipped with the Tiptronic transmission. Positioned at the flanged/intermediate shaft housing, this seal prevents automatic transmission fluid (ATF) from leaking while keeping dirt and moisture from entering the transmission assembly.
Fits:
- Porsche Boxster 986 2.7L 1999-00
- Porsche Boxster S 986 3.2L 1999-00
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- 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
Cars With Option Codes:
249 - Tiptronic Transmission
What This Product Does:
- It seals the interface between the intermediate / flanged shaft and the transmission housing, preventing fluid (transmission oil / ATF) from leaking out.
- Maintains the internal fluid pressure and lubrication inside the Tiptronic transmission / differential system.
- Prevents external contaminants (dirt, water) from entering the transmission via that junction.
- Helps ensure the correct fluid environment, which is critical for gears, bearings and internal transmission components to remain lubricated and cool.
Symptoms Of A Worn / Failed Seal:
- Transmission fluid leaks (ATF / transaxle oil) around the area of the intermediate shaft or housing joint.
- Low transmission / transaxle fluid levels over time.
- Whining, gear noise or increased operating temperature if lubrication is compromised.
- Slipping, harsh shifts, or degraded Tiptronic performance when fluid levels or pressure are affected.
- Oil staining or wetness on the underside of the car or near the transmission.
- Possibly visible damage to the seal (cracks, deformations) or misalignment in the shaft / flange area.
Why Replacement Matters:
- Ensures fluid integrity and pressure inside the transmission—without a proper seal the system can lose fluid or allow contamination.
- Protects internal transmission components (gears, bearings, clutches) from insufficient lubrication or contamination.
- Prevents costly damage from running low on fluid or letting debris in.
- Avoids slipping, erratic shifting, or even transmission failure.
Diagram Ref No 6
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98639703400
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Seal for Differential Output Shaft - Cover Side - for Porsche 986 / 987-1 Boxster & Cayman (Tiptronic Gearbox)
- 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 Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Oil seal for the short differential output shaft, located on the side of the gearbox with the differential cover.
Outer Diameter: 90mm.
Fits:
Vehicles With Tiptronic Transmission (PR 249)
Porsche 986 Boxster 1997-04
Porsche 987-1 Boxster 2005-08
Porsche 987-1 Cayman 2006-08
Diagram ref. 3.
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98639702700
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Seal For Differential Output Shaft Flange For Porsche 986/987-1 Boxster & Cayman / 996-1 Carrera 3.4L (Tiptronic Gearbox)
- 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 Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Outer Diameter: 54mm.
Fits:
Vehicles With Tiptronic Transmission (PR 249)
Porsche 986 Boxster 1997>>2004
Porsche 987.1 Boxster MKI 2005>>2008
Porsche 987.1 Cayman 2006>>2008
Porsche 996 Carrera 3.4L 1998>>2001
Diagram Ref No 3
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99639701500
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12 Month Warranty
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