Round Seal For Flanged Shaft, (Tiptronic Transmission). Porsche 986 / 987 / 996 1998-08

Round Seal For Flanged Shaft, (Tiptronic Transmission).
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

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Related, superseded, cross reference or alternative numbers for comparison.

98639703400

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