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Lock nut for transmission main shaft. Porsche 911 72-89 / 964 / 993 / 996 turbo / 997 turbo / GT3 - 99903403300
99903403300/1
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 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
Information
Lock nut for transmission pinion shaft - M30 x 1.5
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
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
99903403300
91530228100
The product you are viewing cross references to these numbers
Price: £12.95
In stock
Also found on these pages
Related products
Vehicle Group
- 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 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
Information
Shaft Sealing Ring for oil pump for Tiptronic gearbox.
40 x 52 x 7
Fits:
Porsche 964 Carrera 1989-94 Tiptronic
Porsche 993 Carrera 1994-98 Tiptronic
Click picture for large parts diagram.
Diagram Ref No 2.
40 x 52 x 7
Fits:
Porsche 964 Carrera 1989-94 Tiptronic
Porsche 993 Carrera 1994-98 Tiptronic
Click picture for large parts diagram.
Diagram Ref No 2.
Price: £26.35
Orderable
Vehicle Group
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 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
Information
Gearbox Gasket Set For G50 Gearbox.
The OE Match Gearbox Gasket Set for G50 Gearbox is a comprehensive transmission sealing kit designed to restore the integrity of the Porsche G50 manual gearbox during overhaul, repair or routine maintenance. Manufactured to OE specifications for fit, material quality and durability, this gasket set contains the essential seals and gaskets required to prevent transmission oil leaks and maintain correct lubrication throughout the gearbox.
Fits:
Produced from high-quality gasket materials resistant to gearbox oil, heat and pressure, the components are designed to provide long-lasting sealing performance under demanding operating conditions. Ideal for gearbox rebuilds and preventative maintenance, this OE Match kit helps ensure reliable operation and extends the service life of the transmission.
What This Product Does:
Symptoms Of Wear Or Failure:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96430091200
The product you are viewing cross references to these numbers
The OE Match Gearbox Gasket Set for G50 Gearbox is a comprehensive transmission sealing kit designed to restore the integrity of the Porsche G50 manual gearbox during overhaul, repair or routine maintenance. Manufactured to OE specifications for fit, material quality and durability, this gasket set contains the essential seals and gaskets required to prevent transmission oil leaks and maintain correct lubrication throughout the gearbox.
Fits:
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 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
Produced from high-quality gasket materials resistant to gearbox oil, heat and pressure, the components are designed to provide long-lasting sealing performance under demanding operating conditions. Ideal for gearbox rebuilds and preventative maintenance, this OE Match kit helps ensure reliable operation and extends the service life of the transmission.
What This Product Does:
- Provides replacement gaskets and seals for the Porsche G50 gearbox.
- Restores leak-free sealing between gearbox components.
- Prevents transmission oil leaks.
- Maintains correct gearbox oil levels.
- Protects internal gears, bearings and synchronisers through proper lubrication.
- Supports reliable gearbox operation after servicing or rebuilding.
- Helps reduce the risk of contamination entering the transmission.
- Forms an essential part of any G50 gearbox overhaul or repair.
Symptoms Of Wear Or Failure:
- Gearbox oil leaks.
- Oil residue around gearbox mating surfaces.
- Low gearbox oil level.
- Difficulty selecting gears due to lubrication loss.
- Increased gearbox noise or whining.
- Oil contamination around the transmission housing.
- Burning oil smell after driving.
- Premature wear of gearbox components.
- Damp or stained transmission casing.
- Visible deterioration or hardening of gasket material during servicing.
Why Replacement Matters:
- Gearbox gaskets and seals are continually exposed to transmission oil, heat, pressure fluctuations and vibration. Over time, sealing materials can harden, shrink or deteriorate, allowing oil to escape and contaminants to enter the transmission.
- Loss of gearbox oil can reduce lubrication to gears, bearings and synchronisers, accelerating wear and potentially leading to expensive transmission damage. Oil leaks may also contaminate surrounding components and create maintenance issues.
- Replacing all critical gaskets and seals during gearbox servicing or rebuilding helps restore the transmission's sealing integrity and ensures long-term reliability. An OE Match Gearbox Gasket Set provides factory-style fitment, high-quality sealing materials and dependable durability, helping protect your Porsche G50 gearbox while maintaining smooth, reliable shifting performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96430091200
96430091200
95030091100
The product you are viewing cross references to these numbers
Price: £64.50
In stock
Vehicle Group
- 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
Information
Transmission Cover Gasket.
Fits:
Cars with Manual Gearbox
Porsche 911 1987-89 G50 Gearbox
Porsche 964 1989-94
Porsche 993 1995-98
Click 'Zoom in' for large parts diagram.
Diagram ref no 31
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030135102
The product you are viewing cross references to these numbers
Fits:
Cars with Manual Gearbox
Porsche 911 1987-89 G50 Gearbox
Porsche 964 1989-94
Porsche 993 1995-98
Click 'Zoom in' for large parts diagram.
Diagram ref no 31
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030135102
95030135102
The product you are viewing cross references to these numbers
Price: £4.93
In stock