Gearbox Casing / Casing Parts

Angled Drive for tacho / Rev Counter Drive shaft.



Fits:
Porsche 911 01/1963-08/1973

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Diagram ref no 20.

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91131802900

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Angled Drive For Tacho / Rev Counter Drive Shaft.
The OE Match Angled Drive for Tacho / Rev Counter Drive Shaft is a premium-quality replacement mechanical instrument drive component designed to transmit rotational movement from the engine to the tachometer (rev counter) on compatible classic Porsche models. Manufactured to OE specifications for fit, accuracy and durability, this angled drive ensures reliable operation of the mechanical rev counter, allowing accurate engine speed readings while maintaining the original factory instrumentation.  

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)  

Diagram Ref No 20

Manufactured from high-quality precision-machined steel with durable internal gears and bearings, the angled drive is engineered to withstand continuous rotational loads, engine vibration and prolonged operation. Precision-built for direct OE-style installation, it provides smooth, accurate drive to the tachometer cable or drive shaft, making it an ideal replacement for worn, damaged or seized original units during restoration or instrument repairs.  

What This Product Does:

• Transfers rotational drive from the engine to the mechanical tachometer.
• Provides accurate engine speed (RPM) readings.
• Changes the direction of drive through a precision-machined angled gearbox.
• Supports reliable operation of the rev counter.
• Maintains factory instrument accuracy.
• Ensures smooth transmission of mechanical drive.
• Restores OE-style functionality of the tachometer system.
• Forms an essential part of the mechanical rev counter drive system.

Symptoms Of Wear Or Failure:

• Inoperative tachometer or rev counter.
• Erratic or fluctuating RPM readings.
• No movement of the rev counter needle.
• Clicking, grinding or whining noises from the drive.
• Seized or stiff drive mechanism.
• Excessive wear in the internal gears.
• Oil leaks from the drive assembly where applicable.
• Damaged or worn drive shaft connection.
• Inconsistent engine speed indication.
• Reduced reliability of the instrument system.

Why Replacement Matters:

• The angled drive operates continuously whenever the engine is running, transmitting rotational movement through precision gears to the mechanical tachometer. Over time, normal wear, insufficient lubrication, contamination or age can cause the internal gears and bearings to wear or seize, resulting in inaccurate or complete loss of tachometer operation.
• A faulty angled drive can prevent the driver from accurately monitoring engine speed, increasing the risk of over-revving the engine and reducing confidence during spirited driving or gear changes. Continued use of a worn drive may also damage the tachometer cable or associated instrument components.
• Replacing a worn or damaged angled drive restores accurate rev counter operation and preserves the originality of the vehicle's mechanical instrumentation. The OE Match replacement provides factory-style fitment, precision-engineered internal components and long-lasting durability, making it the ideal solution for Porsche restoration, instrument repair and preventative maintenance.

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91131802900

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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 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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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 bleeder.



Fits:
Porsche 911/912 1965-89
Porsche 914 1970-76

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Diagram ref no 11

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90430107100

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The factory cast magnesium intermediate plate is known to be problematic. Original ones tend to crack, have loose or out of round bearing bores or may have worn out shift shaft provisions.

Perfect for street, race, higher horsepower and V8 applications-where the additional strength is really needed!

Precision machined from aircraft grade billet aluminum to exacting standards for perfect fit and function
Replaceable silicone bronze shift rail bushings
Lightest weight possible, only 4.25 lbs

Fits all Porsche 901/911 late '69-'71 and 914 '70-'76 magnesium case "die casting" transmissions.

Replaces part 911.301.221.00

Note:
1. If replacing the 4 point bearings it's recommend you use GENUINE PORSCHE only due to dimensional differences we have found between used original, "OEM" new and Genuine Porsche bearings.

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91130122100

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Gearbox ground strap
This OE Match gearbox ground strap is a replacement earth strap used to connect the gearbox/transmission to the vehicle chassis. It provides a reliable electrical ground path between the drivetrain and body, helping the vehicle’s electrical system operate correctly

Fits:
Porsche 911 - 1965 to 1973 Manual  and Sportomatic
Porsche 911 - 1974 to 1983 Sportomatic
Porsche 356 - 1950 to 1965

Diagram ref no 62

The gearbox ground strap completes the electrical circuit between the transmission and chassis. A secure ground connection is essential for starter motor performance, charging system function, ignition reliability, lighting, and general electrical stability.

Functions
•  Connects the gearbox/transmission to the chassis ground point
•  Provides a reliable earth path for the drivetrain
•  Supports correct starter motor operation
•  Helps maintain stable voltage across the electrical system
•  Reduces the risk of intermittent electrical faults
•  Helps prevent poor grounding issues during starting and charging
•  OE Match replacement for the original gearbox earth strap

Ground straps are exposed to moisture, road dirt, corrosion, vibration, and age-related wear. Over time, the strap can fray, corrode, loosen, or develop high resistance, which may lead to slow cranking, starting problems, charging issues, flickering lights, or unpredictable electrical faults. Replacing the gearbox ground strap helps restore a strong electrical connection and improves overall reliability.

When to replace
•  The original ground strap is corroded, frayed, cracked, or damaged
•  The gearbox or transmission has been removed or refitted
•  The car has slow cranking or intermittent starting issues
•  Electrical faults appear after drivetrain or starter work
•  Lights, gauges, or ignition systems behave erratically
•  The ground strap connection is loose or heavily oxidised
•  The vehicle is undergoing restoration or electrical system repair

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99961191820

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Hexagon head screw plug with magnet – yellow anodised.



Fits:
Porsche 911 F (1965 - 1973)
Porsche 911 G (1974 - 1977)
Porsche 914 (1970 - 1976)
Porsche 914/6 (1970 - 1972)

The magnetic screw collects metallic shavings from the inside of the transmission. This is immediately apparent when the screw is unscrewed, allowing mechanical problems to be detected at an early stage.

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Diagram ref no 21

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99906400802

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Hexagon head screw plug without magnet – yellow anodised.



Fits:
Porsche 911 F (1965 - 1973)
Porsche 911 G (1974 - 1977)
Porsche 914 (1970 - 1976)
Porsche 914/6 (1970 - 1972)

Yellow-anodised screw plug for the transmission fluid filling opening on the transmission housing.

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Diagram ref no 21

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99906400702

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Replacing part for 911.301.221.00 (no longer available). Made in house from billet 6061 to correct tolerances.

Genuine Porsche bearings are recommended

Fits 911/912 64-69.5 aluminium case 901 transmissions.

90130122100, 901-301-221-00

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90130122100

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Magnetic drain plug for gearbox. M24 x 1,5



Fits:
Porsche 911 65-69
Porsche 911 72-86
Porsche 930 Turbo 3.0L 87-89
Porsche 930 Turbo 3.3L 75-77

Porsche 928 78-86

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Diagram ref no 17

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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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Throttle bell crank support rod.



Fits:
Porsche 356B / 356C 1960-65
Porsche 911 1965-89
Porsche 914-6 / 914-6:SPM 1970-76

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Diagram ref no 13

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Throttle bell crank support rod.



Fits:
Porsche 356B / 356C 1960-65
Porsche 911 1965-89
Porsche 914-6 / 914-6:SPM 1970-76

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Diagram ref no 13

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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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