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Gasket Sets / Gaskets / Seals / Lock Nuts
By OE Match
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- 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 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 968 CS 3.0L 1993-95
OE Match differential output shaft seal, engineered to replicate the original Porsche component that seals the output shaft on the differential housing. It prevents gear oil from leaking out where the drive axles exit the differential - a critical sealing function in the drivetrain system.
Sold each.
Fits:
Porsche 911 Carrera 3.2L 1984 - 1989
Porsche 911 Turbo 3.3 1978 - 1989
Porsche 964 1989 - 1994
Porsche 993 1995 - 1998
Porsche 996 1998 - 2005
Porsche 986 Boxster 3.2L 2000 - 2004
Porsche 986 968CS 1993 - 1995
Diagram ref no 20
The differential output shaft seal creates a pressure-resistant, low-friction barrier around the rotating driveshaft or axle stub where it exits the differential. It prevents differential oil from escaping the gearbox while allowing rotational movement, helping maintain optimal lubrication of internal gears, bearings, and limited-slip components.
Function: Installed in the differential carrier housing at the output flange, the seal’s elastomer lip bears against the rotating shaft surface, maintaining contact under variable engine speed, gear torque, and temperature conditions. The internal garter spring ensures the lip is held in consistent contact with the shaft surface, helping prevent weeping or drips that can lead to low lubricant levels and accelerated drivetrain wear.
A worn or hard differential output seal can lose its effectiveness over time, leading to leaks, oil drips, and reduced gear oil levels in the differential. Low lubricant can accelerate wear of differential bearings, gears, and limited-slip clutches - ultimately causing expensive internal damage. Replacing the seal with an OE Match component helps preserve proper differential lubrication, reduces contamination of nearby brake and suspension parts with oil, and maintains drivetrain longevity and performance.
When to replace:
• Visible gear oil leakage from the differential area
• Oil accumulating near the rear of the gearbox or under the car
• During differential service or rebuild
• After replacing output shafts/axle flanges
• Preventive maintenance on high-mile vehicles
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911334741
The product you are viewing cross references to these numbers
- 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 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
This OE Match transmission pinion shaft lock nut is a replacement M30 x 1.5 retaining nut used within the gearbox assembly. It is designed to match the original-style fitment and function, helping ensure the pinion shaft is secured to the correct specification.
Sold individually
Fits:
Porsche 911 - 1972 to 1989 (915 and G50)
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1994
Porsche 996 turbo - 2001 to 2005
Porsche 997 turbo - 2007 to 2013
Porsche 996 GT3 - 2003 to 2005
Porsche 997 GT3 - 2007 to 2011
Manual transmission
Diagram ref no 20
The lock nut secures the transmission pinion shaft within the gearbox assembly. Correct retention of the pinion shaft is essential for maintaining drivetrain alignment, gear mesh, bearing preload, and reliable transmission operation.
Functions
• Replaces the transmission pinion shaft lock nut
• Secures the pinion shaft within the gearbox
• Supports correct gear mesh and drivetrain alignment
• Helps maintain bearing preload where applicable
• Used during gearbox rebuild, pinion shaft service, or transmission repair
• Replaces worn, damaged, rounded, corroded, or previously removed lock nuts
• OE Match replacement for Porsche transmission service.
Why Replace This Part?
Transmission lock nuts are highly loaded retaining components and may be damaged during removal, lose locking integrity, or show thread wear over time. Reusing a worn or damaged lock nut can compromise correct pinion shaft retention and may affect gearbox setup. Replacement is recommended during gearbox overhaul or whenever the lock nut has been removed.
When to Replace This Part
• Gearbox or transmission rebuild is being carried out
• The pinion shaft has been removed or serviced
• The original lock nut is rounded, corroded, damaged, or worn
• Thread condition is poor or uncertain
• Gear mesh, bearing preload, or transmission setup is being checked
• Preventative replacement is required during major drivetrain service
• The vehicle is undergoing Porsche gearbox restoration.
Where it fits on the car
This lock nut fits within the gearbox / transmission pinion shaft assembly. It forms part of the internal transmission retaining hardware.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99903403300
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 996 Tiptronic - 2001 to 2005
Porsche 997.1 Tiptronic - 2005 to 2008
For Transmission type
A96.10
A96.35
A97.01
A97.31
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
7222700500
The product you are viewing cross references to these numbers
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
Its function is to act as a primary seal to retain oil around the input (main) shaft of a manual transmission, preventing fluid leaks and protecting driveline components.
Fits:
Porsche 911 Carrera / Turbo 1987 - 1989
Porsche 964 Carrera / Turbo 1989 - 1994
Porsche 993 Carrera / Turbo 1995 - 1998
Porsche 996 Turbo / GT2 / GT3 2001 - 2005
Porsche 997.1 Turbo / GT2 2007 - 2009
Porsche 997.2 Turbo / GT2 2010 - 2013
Porsche 996 GT3 1999 - 2005
Porsche 997 GT3 2007 - 2011
Diagram ref no 12
Application:
• Manual transmission input shaft oil seal
• Cross-referenced with superseded part number: 99911332640
The input shaft seal sits around the input/main shaft where it enters the transmission case. Its job is to keep transmission fluid from leaking out and to prevent contamination from entering the gearbox. By maintaining a secure seal around the rotating shaft, this component helps preserve optimal lubrication, reduce wear, and support smooth gear operation.
In a manual transmission, the input shaft takes power from the clutch and delivers it into the gearbox. The seal must endure rotation, pressure changes, heat, and exposure to transmission fluid, forming a durable barrier that keeps oil inside while preventing dirt and debris from entering. A properly functioning input shaft seal is crucial for transmission longevity and performance.
Over time and mileage, seals can harden, crack, or lose elasticity due to heat, oil exposure, and mechanical wear. A failed input shaft seal can lead to:
• Transmission fluid leaks
• Low fluid levels
• Increased gearbox noise
• Premature wear on gears and bearings
• Potential drivetrain damage
Replacing worn or leaking seals restores proper fluid containment and protects the integrity of the transmission system, preserving performance and reducing the risk of costly repairs.
Replace the input shaft seal if you notice:
• Visible transmission fluid leaks at the bellhousing area
• Low transmission fluid levels
• Gearbox whine or unusual noises
• Transmission slipping or crunching in gear shifts
• After transmission removal or overhaul
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911332641
The product you are viewing cross references to these numbers
- 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 Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08

Fits:
Porsche 986 Boxster 1997-04 Tiptronic
Porsche 987 Boxster 2005-08 Tiptronic
Porsche 987C Cayman 2007>> Tiptronic
Porsche 996 1998-05 Tiptronic
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98639701600
The product you are viewing cross references to these numbers
- 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 997 MK1 TURBO 2007-09
(does not include transfer casing gaskets)
Fits:
Porsche 996 Tiptronic - 2001 to 2005
Porsche 997.1 Tiptronic - 2005 to 2008
For Transmission type
A96.10
A96.35
A97.01
A97.31
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1402706500
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 996 Tiptronic - 2001 to 2005
Porsche 997.1 Tiptronic - 2005 to 2008
For Transmission type
A96.10
A96.35
A97.01
A97.31
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
7222700500
The product you are viewing cross references to these numbers
OEMatch Gasket Sets / Gaskets / Seals / Lock Nuts — Fit, Function, Confidence
For Porsche models, OEMatch supplies gasket sets, seals and lock nuts intended to protect gearboxes and differentials from lubricant loss and contamination while preserving correct internal clearances and pressure. These items are useful for routine service, gearbox rebuilds and resolving persistent transmission leaks.
Available Types
- Complete gearbox and differential gasket sets for rebuilds
- Individual shaft seals, O-rings and grommets
- Lock nuts and transmission fastener kits
Understanding OEMatch Gasket Sets / Gaskets / Seals / Lock Nuts
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original gasket sets, gaskets, seals and lock nuts.
OE (Original Equipment) refers to parts matching original specifications for the gasket sets, gaskets, seals and lock nuts and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM gasket sets, gaskets, seals and lock nuts engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Gaskets and seals create pressure-tight joints between mating gearbox surfaces and around rotating shafts; lock nuts and fastening kits secure components subject to high torque and vibration. Correct material selection and surface condition are essential to maintain sealing performance, particularly where high temperature and exposure to transmission fluids can accelerate degradation. OEMatch integrates a broad catalogue of Porsche part references to help match application requirements.
Benefits Include
- Restores reliable oil containment to prevent leaks
- Preserves gearbox pressure and lubrication pathways
- Reduces the risk of internal wear and noise from fluid loss
Why Gasket Sets / Gaskets / Seals / Lock Nuts Wear and Fail
- Thermal cycling causing shrinkage, cracking or compression set of gasket materials
- Chemical attack or hardening of seals from aged or contaminated fluids
- Damaged or corroded mating surfaces created during service or by debris
- Incorrect installation or re-use of old sealing materials and fasteners
The Importance of Replacing with OEMatch Gasket Sets / Gaskets / Seals / Lock Nuts
Replacing worn or damaged sealing components prevents lubricant loss, contamination and consequential gearbox damage. Renewing gaskets, seals and lock nuts during a rebuild or major service restores designed sealing points and fastener security, helping to maintain smooth, reliable transmission operation and reducing the likelihood of repeat repairs.
Advantages
- Materials chosen for compatibility with transmission fluids and operating temperatures
- Restores intended sealing clearances and assembly torque behaviour
- Facilitates thorough gearbox servicing and long-term reliability when fitted correctly