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Porsche // 911 & 912 (1965-1989) // 911 1975-1977 3.0L Turbo (930)
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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Related, superseded, cross reference or alternative numbers for comparison.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 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
Information
Finally, conversion axle flanges for early 911s and 914s. These are machined in house from 4340 billet steel and heat treated.
Our custom "coarse spline/18 spline" drive flanges will allow 930 or G50 CV joints (with metal grease caps) to bolt up to the early 1969-75 911s and all 914 transaxles.
Shaft length was designed with the stock open diff in mind. If by off-chance you have a factory LSD, spacers will be required.
Sold in pairs.
Fits
Porsche 911 - 1969 to 1975
Porsche 914
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
CMS.914.18T
The product you are viewing cross references to these numbers
Our custom "coarse spline/18 spline" drive flanges will allow 930 or G50 CV joints (with metal grease caps) to bolt up to the early 1969-75 911s and all 914 transaxles.
Shaft length was designed with the stock open diff in mind. If by off-chance you have a factory LSD, spacers will be required.
Sold in pairs.
Fits
Porsche 911 - 1969 to 1975
Porsche 914
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
CMS.914.18T
90133223200
PCG33222300
91433222301
The product you are viewing cross references to these numbers
Price: £1,095.00
Orderable