Please wait… 
Please wait while we process your order,
do not press the back button…
do not press the back button…
Your Vehicle
Porsche // 991 (911) MK1 2012-2016 // 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Category Filter
Round Seal For Flanged Shaft, (Tiptronic Transmission). Porsche 986 / 987 / 996 1998-08 - 98639703400
98639703400/1
Vehicle Group
- 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
Information
Round Seal For Flanged Shaft, (Tiptronic Transmission).
The Porsche Round Seal for Flanged Shaft is a OE MATCH 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:
Symptoms Of A Worn / Failed Seal:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98639703400
The product you are viewing cross references to these numbers
The Porsche Round Seal for Flanged Shaft is a OE MATCH 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
Diagram Ref No 6
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98639703400
98639703400
The product you are viewing cross references to these numbers
Price: £9.60
In stock
Related products
Vehicle Group
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
Information
Joint flange. Sold each.
Fits:
Porsche 997.2 C4 / C4S 2009-12
Porsche 991.1 C4 / C4S 2012-16
Porsche 997 Turbo 2007-13
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99733230900
The product you are viewing cross references to these numbers
Fits:
Porsche 997.2 C4 / C4S 2009-12
Porsche 991.1 C4 / C4S 2012-16
Porsche 997 Turbo 2007-13
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99733230900
99733230900
The product you are viewing cross references to these numbers
Price: £318.80
Orderable