Gasket Sets / Gaskets / Seals / Lock Nuts

Gasket for transmission case.

Fits:
Porsche 911 (1965-1973)
Porsche 912 (1965-1969)
Porsche 914 (1970-1976)

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Diagram ref no 14

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9013011912

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Gasket for transmission case.

Fits:
Porsche 911 (1965-1973)
Porsche 912 (1965-1969)
Porsche 914 (1970-1976)

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Diagram ref no 14

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9013011912

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Gasket set for Sportomatic transmission.

Fits:
Porsche 911 F (1968 - 1971)
Only for vehicles with Sportomatic transmission

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90530090200

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Gasket set for transmission with chilled casting.

Fits:
Porsche 911 T/E/S 1965-70

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90130090100

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Gasket set for transmission from die-casting housing.

Fits:
Porsche 911 T/E/S (1965 to 1971)

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90130091600

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Gear selector input seal. B 15 x 24 x 7

Fits:
Porsche 356 1950-65
Porsche 911 1965-70
Porsche 911 1965-68 Sportomatic Gearbox
Porsche 914 1970-76

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Diagram ref no 8

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99911318540

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Gearbox basket set.

Fits:
Porsche 911 T/E/S/ 65-71 [die cast housing]

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90130091600

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Porsche 901 Gearbox Gasket Set.
Set of gaskets & seals for gearbox overhaul.

for aluminium case type

Fits:
Porsche 911/912 1965-70

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90130090100

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Gearbox side cover plate gasket. 
For 901 gearbox

Fits:
Porsche 911 - 1965 to 1970

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Gear Selector Shaft Oil Seal

OE Match gear selector shaft oil seal for classic Porsche 911 and 912 manual gearboxes. Designed to replace a worn or leaking original seal, this component helps prevent transmission oil from escaping around the gear selector shaft where it passes through the gearbox housing.

Fits:
Porsche 911 1965-1968 2.0L / 912 SWB (F)                               
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 1975-1977 3.0L Turbo (930)
Porsche 911 1978-1989 3.3L Turbo (930)
Porsche 912E 4CYL 1976

Diagram ref no 8

The seal provides a barrier between the moving selector shaft and gearbox casing, helping retain the correct transmission oil level and protecting the surrounding components from oil contamination.

What Does the Gear Selector Shaft Oil Seal Do?

The gear selector shaft transfers movement from the gear lever linkage into the gearbox, allowing the driver to select different gears.

The oil seal fits around this shaft and prevents gearbox oil from escaping while allowing the shaft to move during gear changes. A properly functioning seal helps maintain the transmission oil level and keeps the gearbox exterior clean and dry.

Why Does It Fail?

Over time, the sealing material can harden, shrink or lose flexibility due to age, heat and prolonged contact with transmission oil.

Common causes of failure include:

• Age-related deterioration of the sealing lip
• Hardened or cracked rubber
• Wear from repeated selector shaft movement
• Corrosion or damage to the shaft sealing surface
• Incorrect installation or previous gearbox repairs
• Excessive shaft movement or wear

As the seal deteriorates, transmission oil may begin to seep around the selector shaft.

When Should It Be Replaced?

A replacement may be required if you notice:

• Gearbox oil leaking around the selector shaft
• Oil collecting on the underside of the transmission
• Drips beneath the gearbox
• A persistent oily residue around the selector linkage
• A damaged or hardened seal during gearbox servicing

The seal should also be inspected whenever the gearbox selector mechanism is dismantled or the transmission is removed for restoration.

Checks During Replacement

Before fitting a new oil seal, inspect the selector shaft for corrosion, scoring or excessive movement. Check the gearbox breather and surrounding seals to ensure the leak has been correctly identified.

The new seal should be installed squarely and to the correct depth, without damaging the sealing lip or shaft surface.

Porsche 911 / 912 Gearbox Oil Seals & Transmission Components

Gearbox oil seals are essential for maintaining the correct lubrication of classic Porsche manual transmissions. The gear selector shaft oil seal prevents transmission oil from leaking where the selector shaft enters the gearbox housing.

On older Porsche 911 and 912 models, ageing seals can become brittle or worn, allowing gearbox oil to escape. Replacing a leaking seal helps protect the transmission against lubricant loss and prevents oil contamination around the gear linkage and gearbox casing.

OE Match seal is a 15 × 24 × 7 mm replacement selector shaft oil seal for selected Porsche 911, 912 and 930 Turbo manual gearboxes. It is particularly suitable for maintenance and restoration of classic Porsche transmissions. 

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99911318540

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Oil seal for the shifter shaft at the rear of the gearbox case. 15 X 24 X 7 mm

Fits:
Porsche 911 1965-1986 (not for G50 transmission)

Porsche 930 Turbo 1975-89
Porsche 911 (930) Turbo 1975-1989

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Diagram ref no 8

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99911318540

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Oil seal for main drive shaft.
Inner Diameter : 22.2 mm
Outer Diameter : 40 mm

Fits:
Porsche 356 /A/B/C 1.1L-1.6L 01/1950-12/1965
Porsche 911 2.0L 01/1963-08/1967
Porsche 914 1.7-2.0L 01/1969-12/1975

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113311113B

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Oil Seal For Mainshaft.
The OE Match Oil Seal for Mainshaft is a high-quality replacement sealing component designed to prevent gearbox oil from escaping around the transmission mainshaft. Manufactured to OE specifications, this precision-engineered seal provides a secure barrier between rotating transmission components and the gearbox housing, helping to maintain correct lubrication and protect against fluid loss.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 356 1950-55Porsche 356A 1955-59
• Porsche 356B 1959-63Porsche 356C 1963-65
• Porsche 914 (1970-1976)

Constructed from durable oil-resistant materials, the seal is designed to withstand continuous shaft rotation, temperature fluctuations and long-term exposure to transmission oil. It is an essential service item during gearbox repairs, rebuilds and preventative maintenance.  

What This Product Does:

• Prevents gearbox oil from leaking around the mainshaft.
• Maintains proper lubrication within the transmission.
• Protects gearbox components from oil loss.
• Prevents dirt, moisture and contaminants from entering the gearbox.
• Supports reliable transmission performance and longevity.
• Helps maintain correct gearbox oil levels.

Symptoms Of Wear Or Failure:

• Gearbox oil leaks beneath the vehicle.
• Oil residue around the transmission housing or shaft area.
• Gradual loss of gearbox oil.
• Difficulty maintaining correct transmission fluid levels.
• Contamination of surrounding components with oil.
• Increased transmission noise caused by reduced lubrication.
• Premature wear of gearbox bearings and internal components.
• Burning oil smells if leaking oil contacts hot surfaces.

Why Replacement Matters:

• Mainshaft oil seals are subjected to constant shaft rotation, vibration, heat and prolonged exposure to transmission oil. Over time, the sealing lip can harden, wear or lose elasticity, reducing its ability to maintain an effective seal.
• A leaking oil seal can allow gearbox lubricant to escape, potentially reducing lubrication to critical internal components. If left unresolved, low oil levels can accelerate wear of gears, bearings and synchronisers, leading to costly transmission repairs or rebuilds.
• Replacing a worn mainshaft oil seal helps preserve correct gearbox lubrication, prevents oil leaks and protects internal transmission components from premature wear. An OE Match replacement restores the integrity of the gearbox sealing system and helps ensure reliable long-term transmission performance.

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113311113B

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Seal for gearbox cover.

Fits:
Porsche 914/6 1970–1972 Sportomatic gearbox only
Porsche 911 F 1968–1973 Sportomatic gearbox only

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90530139202

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Sportomatic Gearbox Shaft Sealing Ring.
45 x 60 x 7

Fits:
Porsche 911 1965 - 1983
Porsche 914 1970 - 1976

Diagram ref no 19

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99911318941

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Transmission case gasket for 901 type transmissions.

Fits:
Porsche 911 1969-71
Porsche 912
Porsche 914

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Diagram ref no 2

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90130139212

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