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Lock nut for transmission main shaft. Porsche 911 72-89 / 964 / 993 / 996 turbo / 997 turbo / GT3 - 99903403300
99903403300
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
The Genuine Porsche 99903403300 transmission pinion shaft lock nut is an OE M30 x 1.5 shouldered lock nut for selected Porsche manual gearbox applications, including 911 1972–1989, 964, 993, 996 Turbo, 997 Turbo and GT3 models. It secures key transmission shaft components and is ideal for gearbox rebuilds, transmission repairs or restoration using Genuine Porsche hardware.
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
This nut is used in selected Porsche manual gearbox assemblies, including 915, G50 and later Turbo / GT gearbox applications where specified.
What This Part Does / Functions
• Secures transmission shaft components in position
• Helps maintain correct gearbox shaft assembly preload and alignment
• Supports proper operation of the pinion shaft / main shaft assembly
• Helps prevent loosening under drivetrain load and vibration
• Provides correct OE Porsche M30 x 1.5 thread and shouldered nut design
• Replaces a worn, damaged, previously removed or incorrectly reused lock nut
• Supports correct transmission rebuild and gearbox service procedures
• Maintains factory Porsche gearbox hardware specification.
Why Replace This Part?
Transmission lock nuts are critical gearbox fasteners. During gearbox rebuilds or shaft service, the original nut may be removed, disturbed, damaged or no longer suitable for reuse. A worn, distorted or incorrectly secured shaft nut can affect gearbox assembly, shaft retention and long-term reliability. Replacing it with a Genuine Porsche OE transmission shaft lock nut helps ensure the gearbox is rebuilt using the correct factory-specified hardware.
When to Replace This Part
• During manual gearbox rebuild or overhaul
• When servicing the transmission main shaft or pinion shaft
• If the original nut is worn, damaged, distorted or corroded
• If the nut has been removed during gearbox disassembly
• During differential, gear set or shaft bearing replacement
• If the original lock nut no longer secures correctly
• When restoring a Porsche gearbox with correct OE hardware
• Whenever Porsche workshop procedure recommends replacement after removal.
Where It Fits on the Car
This lock nut fits inside the manual transmission / gearbox assembly. It is used on the transmission main shaft or pinion shaft, depending on the gearbox type and application.
Installation requires correct Porsche gearbox tools, torque procedure and workshop specifications. This is a specialist transmission component and should be fitted by an experienced Porsche gearbox technician.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99903403300
The product you are viewing cross references to these numbers
The Genuine Porsche 99903403300 transmission pinion shaft lock nut is an OE M30 x 1.5 shouldered lock nut for selected Porsche manual gearbox applications, including 911 1972–1989, 964, 993, 996 Turbo, 997 Turbo and GT3 models. It secures key transmission shaft components and is ideal for gearbox rebuilds, transmission repairs or restoration using Genuine Porsche hardware.
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
This nut is used in selected Porsche manual gearbox assemblies, including 915, G50 and later Turbo / GT gearbox applications where specified.
What This Part Does / Functions
• Secures transmission shaft components in position
• Helps maintain correct gearbox shaft assembly preload and alignment
• Supports proper operation of the pinion shaft / main shaft assembly
• Helps prevent loosening under drivetrain load and vibration
• Provides correct OE Porsche M30 x 1.5 thread and shouldered nut design
• Replaces a worn, damaged, previously removed or incorrectly reused lock nut
• Supports correct transmission rebuild and gearbox service procedures
• Maintains factory Porsche gearbox hardware specification.
Why Replace This Part?
Transmission lock nuts are critical gearbox fasteners. During gearbox rebuilds or shaft service, the original nut may be removed, disturbed, damaged or no longer suitable for reuse. A worn, distorted or incorrectly secured shaft nut can affect gearbox assembly, shaft retention and long-term reliability. Replacing it with a Genuine Porsche OE transmission shaft lock nut helps ensure the gearbox is rebuilt using the correct factory-specified hardware.
When to Replace This Part
• During manual gearbox rebuild or overhaul
• When servicing the transmission main shaft or pinion shaft
• If the original nut is worn, damaged, distorted or corroded
• If the nut has been removed during gearbox disassembly
• During differential, gear set or shaft bearing replacement
• If the original lock nut no longer secures correctly
• When restoring a Porsche gearbox with correct OE hardware
• Whenever Porsche workshop procedure recommends replacement after removal.
Where It Fits on the Car
This lock nut fits inside the manual transmission / gearbox assembly. It is used on the transmission main shaft or pinion shaft, depending on the gearbox type and application.
Installation requires correct Porsche gearbox tools, torque procedure and workshop specifications. This is a specialist transmission component and should be fitted by an experienced Porsche gearbox technician.
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: €23.68
Arriving soon
Related products
Vehicle Group
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Information
Radial shaft seal torque converter 43,65 x 62,1 x 7,7
This radial shaft seal is a precision-engineered OE match replacement used in the automatic transmission (Tiptronic) system of Porsche Cayenne 955 and 957 models. Installed at the torque converter interface, it ensures a tight seal around the rotating shaft. Manufactured to exact factory specifications, the seal features precise dimensions (43.65 x 62.1 x 7.7 mm) for a perfect fit and reliable performance.
Fits:
Porsche 955 Cayenne 2003 - 2006
Porsche 957 Cayenne 2007 - 2010
Diagram ref no 5
This seal prevents automatic transmission fluid from leaking at the torque converter shaft interface. It also blocks dirt and contaminants from entering the transmission, helping to preserve internal components and maintain smooth operation.
Function
• Seals the interface between torque converter and transmission housing
• Prevents transmission fluid leaks under pressure
• Protects internal components from dirt and contaminants
• Maintains proper lubrication within the transmission system
• Supports smooth and efficient drivetrain operation
A failing torque converter seal can lead to transmission fluid leaks, which may result in poor shifting, overheating, and internal damage. Because the seal operates under constant heat and pressure, it can harden or wear over time.
Replacing it ensures proper sealing, protects the transmission, and prevents costly repairs.
When to replace
• Visible transmission fluid leaks (especially around bellhousing area)
• Signs of low transmission fluid levels
• During torque converter or transmission servicing
• Evidence of seal wear, hardening, or cracking
• Slipping gears or irregular transmission performance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95532124302
The product you are viewing cross references to these numbers
This radial shaft seal is a precision-engineered OE match replacement used in the automatic transmission (Tiptronic) system of Porsche Cayenne 955 and 957 models. Installed at the torque converter interface, it ensures a tight seal around the rotating shaft. Manufactured to exact factory specifications, the seal features precise dimensions (43.65 x 62.1 x 7.7 mm) for a perfect fit and reliable performance.
Fits:
Porsche 955 Cayenne 2003 - 2006
Porsche 957 Cayenne 2007 - 2010
Diagram ref no 5
This seal prevents automatic transmission fluid from leaking at the torque converter shaft interface. It also blocks dirt and contaminants from entering the transmission, helping to preserve internal components and maintain smooth operation.
Function
• Seals the interface between torque converter and transmission housing
• Prevents transmission fluid leaks under pressure
• Protects internal components from dirt and contaminants
• Maintains proper lubrication within the transmission system
• Supports smooth and efficient drivetrain operation
A failing torque converter seal can lead to transmission fluid leaks, which may result in poor shifting, overheating, and internal damage. Because the seal operates under constant heat and pressure, it can harden or wear over time.
Replacing it ensures proper sealing, protects the transmission, and prevents costly repairs.
When to replace
• Visible transmission fluid leaks (especially around bellhousing area)
• Signs of low transmission fluid levels
• During torque converter or transmission servicing
• Evidence of seal wear, hardening, or cracking
• Slipping gears or irregular transmission performance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95532124302
95532124300
95532124301
95532124302
The product you are viewing cross references to these numbers
Price: €23.54
In stock
Vehicle Group
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
Information
Radial Shaft Seal For Bush Version, 43.8MM X 62.1MM X 7.7MM.
Restore the integrity of your drive-train with this genuine radial shaft seal for Porsche Cayenne 955 series models. Designed to fit a shaft dimension of 43.8 mm ID × 62.1 mm OD × 7.7 mm thickness, this seal ensures reliable sealing of rotating shafts, prevents oil/grease leakage and blocks contamination ingress.
Fits:
G0R - Tiptronic S
Diagram Ref No 5
What This Product Does:
Symptoms & Signs Of Wear / When To Replace:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95532124300
The product you are viewing cross references to these numbers
Restore the integrity of your drive-train with this genuine radial shaft seal for Porsche Cayenne 955 series models. Designed to fit a shaft dimension of 43.8 mm ID × 62.1 mm OD × 7.7 mm thickness, this seal ensures reliable sealing of rotating shafts, prevents oil/grease leakage and blocks contamination ingress.
Fits:
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
G0R - Tiptronic S
Diagram Ref No 5
What This Product Does:
- A radial shaft seal is used where a rotating shaft (such as a drive shaft, gearbox output, differential input, etc) passes through a housing. Its job is to maintain a tight seal between the shaft and housing to prevent fluid (oil, gear lube) leakage and prevent ingress of dirt, dust or moisture.
- In this particular application (Cayenne drive-train / transmission area) it ensures the correct lubrication stays in place around the rotating component and helps protect bearings and shafts from contamination.
- By maintaining correct sealing, it supports long-term drive-train integrity, reduces wear and prevents leakage that could lead to bigger mechanical failures.
Symptoms & Signs Of Wear / When To Replace:
- Fluid leaks around the shaft housing. For example oil or gear-oil visibly seeping / dripping from the area where the seal sits.
- Excessive play or noise in the drive-train or shaft area, which may indicate seal failure allowed contamination and led to bearing deterioration.
- Contamination or dirt ingress around the seal housing — if the seal lip has lost contact, dirt may be visible in the housing.
- Visible damage to the seal such as hardened rubber, cracked lip, missing spring, or nicks in the sealing surface.
- When servicing the shaft or housing area: if the seal is disturbing or old (many years/mi), replacing it while the unit is accessible is often prudent.
Why Replacement Matters:
- Prevents major fluid loss: A failed seal may allow lubrication to escape which can lead to shaft bearing failure or gearbox/differential damage — replacing it is much cheaper than replacing major components.
- Protects internal components: A good seal keeps dust and moisture out, preserving bearings, splines, shafts and preventing accelerated wear.
- Maintains performance and reliability: When seals are intact the drive-train operates quietly, smoothly and with less maintenance concern.
- Maintenance and peace of mind: Especially for a high-end vehicle like a Cayenne, ensuring all seals are in good order supports confidence in long-term use and resale value.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95532124300
95532124300
The product you are viewing cross references to these numbers
Price: €40.39
Orderable
Vehicle Group
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
- Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne S V8 4.2L Diesel (382Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
- Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- Porsche 970.1 Panamera S V8 4.8L 2009-13
- Porsche 970.1 Panamera 4S V8 4.8L 2009-13
- Porsche 970.1 Panamera GTS V8 4.8L 2011-13
- Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
- Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
- Porsche 970.1 Panamera Diesel V6 3.0L 2011-13
- Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
- Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
- Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
- Porsche 970.2 Panamera Turbo V8 Executive 2014-16
- Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
- Porsche 970.2 Panamera Diesel V6 3.0L (250Hp) 2014-16
- Porsche 970.2 Panamera S E-Hybrid V6 3.0L (416Hp) 2014-16
Information
8-Speed Automatic Gearbox / Tiptronic Radial Shaft Seal, 41 X 72 X 11.
Symptoms Of Wear Or Failure:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95532118900
The product you are viewing cross references to these numbers
The Radial Shaft Seal (41 x 72 x 11) is a genuine Porsche transmission sealing component designed for use in the 8-speed automatic / Tiptronic gearbox. This seal prevents transmission fluid from leaking around rotating shafts while maintaining proper lubrication and internal pressure within the transmission assembly.
Fits:
Porsche 955 Cayenne 3.2L V6 2003-06
Porsche 955 Cayenne S 4.5L V8 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
Porsche 955 Cayenne Turbo S 4.5L 2006>>
Porsche 957 Cayenne 3.0L Diesel 2007-10
Porsche 957 Cayenne 3.6L 2007-10
Porsche 957 Cayenne S / GTS 4.8L 2007-10
Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
Porsche 958 Cayenne S V8 4.2L Diesel (382Hp) 2010-17
Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Porsche 970.1 Panamera V6 3.6L 2WD 2011-13
Porsche 970.1 Panamera 4 V6 3.6L 4WD 2011-13
Porsche 970.1 Panamera S V8 4.8L 2011-13
Porsche 970.1 Panamera 4S V8 4.8L 2011-13
Porsche 970.1 Panamera GTS V8 4.8L 2011-13
Porsche 970.1 Panamera Turbo V8 4.8L 2011-13
Porsche 970.1 Panamera Turbo S V8 4.8L 2011-13
Porsche 970.1 Panamera Diesel V6 3.0L 2011-13
Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
Porsche 970.2 Panamera Turbo V8 Executive 2014-16
Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
Porsche 970.2 Panamera Diesel V6 3.0L (250Hp) 2014-16
Porsche 970.2 Panamera S E-Hybrid V6 3.0L (416Hp) 2014-16
Diagram Ref No 17
What This Product Does:
- Prevents automatic transmission fluid (ATF) leaks around rotating shafts
- Maintains proper lubrication within the gearbox
- Protects internal transmission components from contamination
- Supports consistent hydraulic pressure inside the transmission
- Ensures smooth and reliable drivetrain performance
Symptoms Of Wear Or Failure:
- Transmission fluid leaks around the gearbox or shaft area
- ATF spots or puddles beneath the vehicle
- Oil residue around the seal or transmission housing
- Low transmission fluid levels
- Transmission slipping or delayed gear engagement due to fluid loss
Why Replacement Matters:
- Prevent transmission fluid leaks
- Maintain correct gearbox fluid levels
- Protect internal gears and bearings from premature wear
- Ensure smooth gear shifting and drivetrain operation
- Avoid costly automatic transmission repairs
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95532118900
95532118900
The product you are viewing cross references to these numbers
Price: €48.06
Orderable