Bearings / Bearing Retaining Plates / Bushes

Cylinder thrust bearing for transmission



Fits:
Porsche 911 / 912 1965-86
Porsche 914 1970-76
Porsche 924 1976-85

Click 'Zoom in' for large parts diagram.
Diagram ref no 28

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99920200100

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Bearing retaining plate for 915 transmissions 

Fits:
Porsche 911 '72-'86 (Not for 4-speed gearboxes)

• Precision machined
• Better support for both the main and pinion shaft bearings
• Improved design incorporates an oil groove promoting more lubrication to the input shaft bearings
• Substantial clearances for ease of assembly
• Perfect fit for bearings and assembly
• Much stronger than the original cast two piece design

Replaces parts 915 302 121 03 and 915 302 123 03

Notes:
Do not use the factory lock washers.
For use only with the 4mm flange 4 point pinion bearing 999.052.030.00

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91530212303

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Flywheel-End, Shaft bearing (or pinion bearing) for 915 transmission.
The Genuine Porsche flywheel-end pinion bearing 99911014601 is the exact factory-spec bearing used in 915 transmissions from 1972–1989. This bearing supports the pinion shaft at the flywheel end, keeping it perfectly aligned for factory-correct gear operation, quietness, and longevity. It ensures the 915 gearbox shifts smoothly and prevents premature wear of gears and synchronisers.

Fits:
Porsche 911 1974 - 1989 (915 Gearbox)

Diagram Ref no 28.

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99911014601

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Flywheel-End, Shaft Bearing (Or Pinion Bearing) For 915 Transmission.
The OE Match Flywheel-End Shaft Bearing (Pinion Bearing) for 915 Transmission (99911014601/1) is a high-quality replacement transmission bearing designed to support and accurately locate the pinion shaft within the Porsche 915 gearbox. Manufactured to OE specifications for fit, precision and durability, this bearing plays a critical role in maintaining proper shaft alignment, smooth gear operation and efficient power transfer throughout the transmission.  

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L  

Diagram Ref No 28

Constructed from premium-grade bearing steel and engineered to withstand high rotational loads, torque forces and continuous gearbox operation, the flywheel-end shaft bearing helps minimise friction while supporting the pinion shaft under demanding driving conditions. Correct bearing performance is essential for preserving gearbox reliability, shift quality and transmission longevity.  

What This Product Does:

• Supports the pinion shaft within the 915 transmission.
• Maintains precise shaft alignment during operation.
• Reduces friction between rotating gearbox components.
• Helps ensure smooth gear engagement and operation.
• Supports efficient power transfer through the transmission.
• Minimises wear on gears, shafts and related components.
• Contributes to overall gearbox performance and durability.

Symptoms Of Wear Or Failure:

• Whining, humming or rumbling noises from the transmission.
• Increased gearbox vibration.
• Excessive shaft movement or internal transmission play.
• Rough or noisy operation while driving.
• Difficulty maintaining smooth gear engagement.
• Metal particles found in gearbox oil.
• Premature wear of gears and associated transmission components.
• Increased transmission operating temperatures.
• Severe gearbox damage if bearing failure progresses.

Why Replacement Matters:

• The flywheel-end shaft bearing operates under constant rotational loads and is subjected to significant torque forces, heat and vibration throughout its service life. Over time, bearing surfaces can wear, lubrication can deteriorate and internal clearances can increase, reducing the bearing's ability to support the pinion shaft accurately.
• A worn bearing can allow excessive shaft movement, affecting gear mesh accuracy and placing additional stress on gears, synchronisers and other internal transmission components. If left unresolved, bearing failure can lead to accelerated gearbox wear, increased noise and potentially extensive transmission damage requiring a full rebuild.
• Replacing a worn flywheel-end shaft bearing restores correct shaft support, improves gearbox smoothness and helps protect valuable transmission components from premature wear. An OE Match replacement provides factory-style fitment, precision manufacturing and dependable long-term durability, ensuring reliable performance and helping preserve the operation of your Porsche 915 transmission.

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99911014601

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Four Point Bearing.
The OE Match Four Point Bearing is a high-quality precision-engineered bearing designed to support both radial and axial loads within critical Porsche mechanical assemblies. Manufactured to OE specifications for fit, performance and durability, this four-point contact bearing is designed to provide smooth rotational movement while maintaining accurate component alignment under varying operating conditions. 

Fits: 

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L  

Diagram Ref No 18

Featuring a specialised internal design that allows load distribution across four contact points, this bearing can accommodate forces acting in multiple directions while reducing friction and wear. Constructed from high-grade bearing steel and engineered for long service life, it plays a vital role in maintaining the reliability and efficiency of the components in which it is installed.  

What This Product Does:

• Supports rotating components under radial and axial loads.
• Maintains precise alignment within mechanical assemblies.
• Reduces friction between moving parts.
• Distributes loads evenly across multiple contact points.
• Allows smooth and efficient rotational movement.
• Minimises wear on associated components.
• Contributes to reliable operation and long-term durability.

Symptoms Of Wear Or Failure:

• Grinding, rumbling or humming noises during operation.
• Excessive vibration from the affected assembly.
• Increased mechanical resistance or rough movement.
• Component misalignment or excessive play.
• Premature wear of surrounding components.
• Overheating caused by increased friction.
• Reduced performance of the supported assembly.
• Metal particles or bearing debris found during inspection.
• Complete bearing seizure in severe failure cases.

Why Replacement Matters:

• Bearings are subjected to constant rotational forces, load changes, vibration and environmental contamination throughout their service life. Over time, wear of the bearing races, rolling elements or cage assembly can reduce bearing performance and compromise component alignment.
• A failing bearing can increase friction, generate excessive heat and place additional stress on surrounding mechanical components. If left unresolved, bearing failure can result in significant damage to shafts, housings and related assemblies, leading to costly repairs and unexpected downtime.
• Replacing a worn four point bearing restores smooth operation, maintains correct load support and helps protect associated components from premature wear. An OE Match replacement provides factory-style fitment, precision manufacturing and dependable long-term durability, ensuring reliable performance and maintaining the engineering standards expected of your Porsche.

Related reference numbers
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99905203000

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Four point bearing.



Fits:
Porsche 911 1974-86 (915 Gearbox)

Click "Zoom in" to see the diagram.
Diagram Ref no 29.

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99905204300

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Four point bearing.



Fits:
Porsche 911 1974-86 (915 Gearbox)

Click 'Zoom in' to see the diagram.
Diagram Ref no 29.

Related reference numbers
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99905204300

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Four point gearbox bearing.



Fits:
Porsche 911 65-71 Manual Gearbox cars
Porsche 911 65-83 Sportomatic Gearbox cars
Porsche 914 70-76 Manual and Sportomatic gearboxes

This part number supersedes part 99905201600

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9990520160A

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Four point gearbox bearing.
A four-point contact bearing inside the gearbox housing that supports the pinion / differential or output shaft, maintaining correct alignment and rotational support under load. It is a critical structural component of the transmission case on classic 911 / 914 gearboxes. Sold as a single bearing unit - replace as needed when rebuilding or servicing the gearbox, or when diagnosing shaft play or bearing wear.

Fits:
Porsche 911 1965 - 1971 Manual Gearbox cars
Porsche 911 1965 - 1983 Sportomatic Gearbox cars
Porsche 914 1970 - 1976 Manual and Sportomatic gearboxes

This bearing replaces the factory-installed unit (or previous equivalent bearing - OE part number 99905201600) and restores proper gearbox support for shafts that transmit torque and rotational forces - vital for gearbox longevity and reliable shifting.

Gearbox bearings wear out over time from torque loads, heat, and repeated cycles. A worn or damaged four-point bearing may lead to:
• Shaft misalignment or excessive play
• Increased gear noise, whining or rumbling
• Premature wear on shafts, gears, or synchros
• Gearbox instability or failure under load

Replacing with a correctly spec’d bearing restores shaft integrity, ensures smooth power transmission, and helps prevent costly internal damage - especially important on vintage 911 and 914 gearboxes where early detection can save major rebuilds.

You should consider replacing this bearing if:
•  There is noticeable shaft play or wobble in the gearbox output or pinion shaft
•  You hear whining, rumbling, or unusual noise from the gearbox under load
•  The gearbox has high mileage or has seen hard use
•  You are performing a gearbox rebuild, overhaul, or restoration
•  Internal inspection reveals bearing wear, scoring, or heat damage

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9990520160A

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Pinion Shaft Bearing for Type 644, 716, 741, and 915 Transmissions



Fits:
Porsche 356 / 356A 1950-59 (G 11 001 >> 25 000)
Porsche 356 / 356A 1950-59 (716/0/1/2/3, 716/4/5)
Porsche 356B / 356C 1960-65
Porsche 911 SC / Carrera 1974-86

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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91530239906

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Pinion Shaft Bearing for Type 644, 716, 741, and 915 Transmissions



Fits:
Porsche 356 / 356A 1950-59 (G 11 001 >> 25 000)
Porsche 356 / 356A 1950-59 (716/0/1/2/3, 716/4/5)
Porsche 356B / 356C 1960-65
Porsche 911 SC / Carrera 1974-86

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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91530239906

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Gearbox cylindrical roller bearing.



Fits:
Porsche 911 1965-73 MAN
Porsche 911 1965-83 SPM

Click 'Zoom in' for large parts diagram.
Diagram ref no 16

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99911000800

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Gearbox cylindrical roller bearing.



Fits:
Porsche 911 1965-73 MAN
Porsche 911 1965-83 SPM

Click 'Zoom in' for large parts diagram.
Diagram ref no 16

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99911000800

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Gearbox cylindrical roller bearing.



Fits:
Porsche 911 1972-86
Porsche 911 (930) Turbo 1975-89

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

Related reference numbers
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99911002500

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Gearbox cylindrical roller bearing.



Fits:
Porsche 911 1972-86
Porsche 911 (930) Turbo 1975-89

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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99911002500

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