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Bearings / Bearing Retaining Plates / Bushes
By OE Match
- 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 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Differential rebuild kit for Porsche 911 1987–1989 G50 gearbox cars by OE Match, suitable for selected 911 3.2 G50 and 3.3 Turbo (930) models.
What This Product Does This kit provides the core components typically required to overhaul the rear differential assembly on G50-equipped Porsche 911 models, helping restore correct internal clearances and consistent operation of the unit.
Kit includes:
1 x Differential outer bearing, (Ref: 99905906400)
1 x Taper roller bearing. (Ref: 99905902702)
6 x Differential Housing Lock Plate. (Ref: 90133228501)
12 x Hexagon-head bolt (Ref: 92833227606)
Functions
- Supports refurbishment of worn differential internals
- Helps re-establish correct bearing support and gear contact
- Assists in reducing internal play and backlash when set up correctly
- Provides parts needed for a planned diff rebuild alongside other drivetrain work
Symptoms of Fault
- Whining or howling noises from the rear at cruise or on overrun
- Clunks when taking up drive or during gear changes
- Noticeable backlash or “thud” in the driveline
- Oil leaks from differential side seals or input area
- Vibration or roughness that changes with road speed
- Reduced or inconsistent traction on cars with limited-slip units
Why Replacement Matters
Over time, bearings, shims and internal hardware in the rear differential wear, especially on older Porsche 911 models that see mixed road use and age-related degradation. Refreshing these parts during a rebuild helps stabilise gear alignment, supports smooth torque transfer and can prevent accelerated wear of crownwheel, pinion and bearings. For G50 cars in particular, maintaining a healthy differential complements the robust gearbox design and contributes to a more predictable, refined drivetrain.
Fits
- Porsche 911 & 912 (1965–1989) – selected models with G50 gearbox
- Porsche 911 1987–1989 3.2L G50
- Porsche 911 1978–1989 3.3L Turbo (930) – applicable versions with G50 transmission
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905906400
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1987-1989 3.2L G50
- 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 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Sold each.

Fits:
Porsche 911 1987-89 - G50 gearbox
Porsche 964 1989-94 - G50 / G64 gearbox
Porsche 993 1995-98 - G50 / G64 gearbox
Porsche 928 1987-95 - G28 gearbox
Click 'Zoom in' for large parts diagram.
Diagram ref no 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99920300300
The product you are viewing cross references to these numbers
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
This OE-Match cylindrical roller bearing is manufactured to Porsche’s original specifications, offering a precise, direct-fit replacement for the factory-installed part.
Fits:
Porsche 911 Carrera (1987 to 1989) * with transmission code G50.00/01/50
Porsche 964 Carrera 2/4 (1989 to 1994)
Diagram ref no 25
• Used in Porsche 911 and 964 models, typically within the gear housing / transmission pinion case as a main roller bearing in the gearbox or pinion casing.
• Positioned on the main shaft / pinion assembly, between casing and rotating elements to carry load and maintain rotation integrity.
What Cylindrical roller bearing does:
• Supports and allows smooth rotation of a shaft under load by reducing friction and handling radial forces
• Maintains alignment, stability, and precision operation of gears and shafts in the drivetrain or gearbox assembly
• Keeps components running quietly and reliably by providing a durable rolling interface
A worn bearing can cause play, noise, or gear misalignment, and in severe cases, lead to transmission failure. Replacing bearing restores the correct fit and load capacity, preventing further wear to surrounding parts. This ensures long-lasting gearbox durability, reduced vibration, and smooth, reliable performance under stress.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911014400
The product you are viewing cross references to these numbers
- Porsche 911 1987-1989 3.2L G50
- 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

Fits:
Porsche 911 Carrera 1987-89 (G5000 / G5001 /
G5002 / G5050)
Porsche 964 1989-94
Click 'Zoom in' for large parts diagram.
Diagram ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911014203
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 911 Carrera 1987-89 Manual 5-Speed
Porsche 964 C2 / C2 RS / Turbo 1989-94
Porsche 993 1995-98
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911010901
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
OE Match differential carrier bearing for Porsche 914/6 and 911F models. This replacement bearing supports the differential carrier assembly, helping maintain correct drivetrain operation, smooth rotation, and reliable gearbox performance.
Fits:
Porsche 914/6 1970 – 1972 Sportomatic gearbox only
Porsche 911 F 1965 – 1973
Diagram ref no 8
The differential carrier bearing supports the differential carrier as it rotates under drive load. A correctly functioning bearing helps maintain proper gear mesh, reduces drivetrain noise, and supports smooth transfer of power through the gearbox and differential.
Functions
• Replaces the differential carrier bearing
• Supports the differential carrier assembly
• Helps maintain correct differential alignment
• Supports smooth drivetrain rotation
• Helps reduce bearing noise, vibration, and rough operation
• Used during gearbox, differential, or transmission overhaul
• OE Match replacement for Porsche drivetrain service.
Why Replace This Part?
Differential carrier bearings are exposed to high rotational loads, gear oil, heat, mileage, and drivetrain stress. Over time, they can become worn, noisy, pitted, loose, or damaged. A worn bearing may cause whining, rumbling, vibration, excessive play, poor gear mesh, or contamination in the gearbox oil. Replacing the bearing during gearbox or differential service helps restore reliable drivetrain operation.
When to Replace This Part
• Gearbox or differential rebuild is being carried out
• Differential bearing noise, whining, or rumbling is present
• Excessive differential carrier play is found
• Bearing wear, pitting, roughness, or damage is visible
• Gear oil contains metallic debris
• Transmission vibration or rough drivetrain operation is being investigated
• The vehicle is undergoing Porsche 914/6 or 911F drivetrain restoration.
Where it fits on the car
This bearing fits within the gearbox / differential carrier assembly on Porsche 914/6 and 911F models. It forms part of the drivetrain and transmission support system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905900800
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C2 1994-97
- 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 GT2 RS 2011-13
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
This OE Match differential outer bearing is a replacement left-side differential bearing for selected Porsche 911, 964, 993, 986 Boxster, 996, 997, and 968 models. It is designed to match the original-style fitment and function, helping support correct differential operation and drivetrain reliability.
Fits:
Porsche 911 1987 - 1989
Porsche 911 Turbo 1975 - 1989
Porsche 968 1992 - 1995
Porsche 964 C2 / C4 1989 - 1994
Porsche 993 C2 1994 - 1998
Porsche 986 Boxster S 2000 - 2004
Porsche 996 C2 / C4 1998 - 2005
Porsche 996 Turbo GT2 2001 - 2005
Porsche 996 GT3 2000 - 2005
Porsche 997.1 Turbo / GT2 / GT2 RS 2007 - 2009
Porsche 997.2 GT2 RS 2011
Porsche 997 GT3 / GT3 RS 2007 - 2011
Diagram ref no 11
The differential outer bearing supports the rotating differential assembly within the gearbox or transaxle housing. It helps maintain correct alignment, smooth rotation, and controlled movement of the differential components as engine power is transferred through the transmission to the drive wheels.
Functions
• Supports the differential assembly inside the gearbox / transaxle
• Helps maintain correct differential alignment
• Allows smooth rotation under drivetrain load
• Supports reliable power transfer to the drive wheels
• Helps reduce vibration, noise, and excessive internal movement
• Replaces worn, noisy, damaged, or failed differential bearings
• OE Match replacement for gearbox, transaxle, or differential repair.
Why Replace This Part?
Differential bearings are exposed to constant load, heat, gear oil, vibration, and high-speed rotation. Over time, the bearing can wear, pit, develop play, become noisy, or fail due to contamination, lack of lubrication, or age. A worn differential bearing may cause whining noises, rumbling, vibration, metal debris in the oil, drivetrain play, or gearbox damage if left unresolved. Replacing the bearing helps restore smooth differential operation and protects surrounding transmission components.
When to Replace This Part
• There is whining, rumbling, or bearing noise from the gearbox / differential area
• Excessive differential play or movement is found during inspection
• Metal particles or bearing debris are found in the gearbox oil
• The bearing is worn, pitted, loose, or damaged
• The gearbox or transaxle is being rebuilt
• The differential has been removed or serviced
• Preventative replacement is being carried out during transmission overhaul.
Where it fits on the car
This bearing fits on the left-side outer differential bearing position within the gearbox or transaxle assembly. It forms part of the differential support system and should be installed according to the factory transmission layout and bearing preload procedure.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905906400
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911014601
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
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
Related, superseded, cross reference or alternative numbers for comparison.
99905203000
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L

Fits:
Porsche 911 1974-86 (915 Gearbox)
Click 'Zoom in' to see the diagram.
Diagram Ref no 29.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905204300
The product you are viewing cross references to these numbers
- 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 1975-1977 3.0L Turbo (930)
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9990520160A
The product you are viewing cross references to these numbers
- Porsche 911 1987-1989 3.2L G50

Fits:
Porsche 911 Carrera 1987-89 (G50.00 / G50.01 / G50.02)
Click 'Zoom in' for large parts diagram.
Diagram ref no 25
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG05208800
The product you are viewing cross references to these numbers
- 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 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65

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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91530239906
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 911 1965-73 MAN
Porsche 911 1965-83 SPM
Click 'Zoom in' for large parts diagram.
Diagram ref no 16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911000800
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
Cylindrical Roller Bearing, Engineered to match the original equipment’s dimensions, load rating and fitment, this bearing provides a direct-fit replacement for the factory unit. This bearing supports the main shaft or input/output shaft of certain Porsche manual gearboxes. It ensures smooth rotation, proper alignment of the transmission internals and helps reduce friction and wear during operation. It used near the collar nut or locknut area.
Fits:
Porsche 911 3.2L 1984-86 for 4 and 5-speed models
Porsche 911 Turbo 3.0L 1975-77
Porsche 911 Turbo 3.3L 1978-88 (4 speed)
Porsche 924 1976-85 Only 5 speed transmission
Porsche 924 Carrera GT 1981
Porsche 924 Turbo 1979-84
Diagram ref no 23
Transmission bearings support rotating shafts and gear clusters under high loads and speeds. Over time wear, misalignment or contamination in the gearbox can cause bearing failure, leading to increased friction, vibration, noise or even gearbox damage. Correct bearing fit is essential for longevity and precision of the transmission.
When to replace:
• During any gearbox overhaul or rebuild, especially when shafts or collar nuts are removed.
• If you notice unusual gearbox noises (rumbling, growling) or shaft play during inspection.
• Whenever replacing major gearbox components—such as synchros, shafts, or other bearings—as a preventive maintenance measure, ensuring optimal alignment and performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030239101
The product you are viewing cross references to these numbers
- 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 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65

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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replacement transmission, transmission case 1978-83 302-00
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gear housing, transmission cover 1978-83 302-05
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gears and shafts 4. speed transmission - G 930/34 - 911 1978-83 303-05
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gears and shafts 5. speed transmission - G 915 - 911 1978-83 303-15
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replacement transmission, transmission case SPM - G 925/16 - 911 1978-83 308-00
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replacement transmission transmission case 911 1987-89 302-00
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gear housing transmission cover 911 1987-89 302-05
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gear housing / transmission cover 911 1987-89 302-07
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gears and shafts 4-speed gear wheel sets see group 3/03/00 303-05
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gears and shafts 5-speed gear wheel sets see group 3/03/10 303-15
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differential 911 1987-89 305-00
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replacement transmission transmission case die casting for 911 UPTO 1971 302-10
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Gear housing complete, transmission case front and transmission suspension for 911 1972 ONWARDS 302-25
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Gears and shafts 4-speed transmission for 911 E/S UPTO 1970 and 911 T UPTO 1971 303-25
-
Differential for manual transmission TYP 915 and sportomatic TYP 925 with armature 911 1970-73 305-05
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Differential for sportomatic TYP 905, Model SPM 911 1970-73 305-10
-
limited-slip differential 911 1970-73 305-15
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transmission case sportomatic for 911 T/E UPTO 1971 307-00
-
transmission case TYP 905/21 sportomatic for 911 T-V 1972 ONWARDS 307-10
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transmission case sportomatic TYP 925 for 911 T-E/E/S and CARRERA 2.7 and 911 T-K 1972 ONWARDS 307-20
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gears and shafts SPM - G 925/16 - 911 1978-83 309-05
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differential SPM 911 1978-83 311-00
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gear housing, transmission cover 911 1984-86 302-05
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gears and shafts 4-speed 911 1984-86 303-05
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gears and shafts 5-speed 911 1984-86 303-15
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Differential 911 1984-86 305-00
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Gear housing, transmission cover 911 1974-77 302-05
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Gears and shafts 4-speed - Model 915 - 911 1974-77 303-05
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Gears and shafts 5 speed - Models: TYP 915 / TYP 923 - 911 1974-77 303-15
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Differential 911 1974-77 305-00
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Replacement transmission, transmission case 911 1974-77 SPM 308-00
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Gears and shafts 911 1974-77 SPM 309-05
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replacement transmission, transmission case chilled casting for 911 T/E/S UPTO 1970 302-00
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gears and shafts 5-speed transmission for 911 UPTO 1971 303-05
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Gears and shafts 5-speed transmission (gear wheel sets 915.300/02) for 911 1972 onwards 303-15
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gears and shafts 4-speed transmission for 911 1972 ONWARDS 303-35
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differential with chilled casting or die casting housing without armature 911 1970 305-00
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gears and shafts sportomatic for 911 1972 ONWARDS 308-15
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replacement transmission, transmission case, chilled casting 911 1965-69 302-00
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replacement transmission, transmission case, die casting 911 1969 onwards 302-10
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gears and shafts 4-speed transmission 911 1965-69 303-15
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differential for 911 TU / 912 1968 305-05
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differential sportomatic 911 TU/L/S UPTO 1968 305-10
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differential with chilled casting or die casting housing for 911 1969 305-15
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limited-slip differential for die casting housing 911 1969 305-25
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transmission case sportomatic 911 1965-69 307-00
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gears and shafts sportomatic 911 1965-69 308-05
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gear housing, transmission cover 911 TURBO 1975-77 302-05
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gear wheel sets 911 TURBO 1975-77 303-05
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differential 911 TURBO 1975-77 305-00
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gears and shafts 308-05
OEMatch Bearings / Bearing Retaining Plates / Bushes — Fit, Function, Confidence
OEMatch supplies bearings, retaining plates and bushes for Porsche models, intended to support gearbox rebuilds, maintenance and restoration projects. These precision parts maintain shaft alignment, reduce friction and control vibration to preserve gearbox behaviour across road and competition applications. OEMatch catalogs over 4,000 individual part numbers and more than 8,700 OE cross-references, and continues to develop new lines for Porsche applications.
Available Types
- Individual gearbox bearings for input, layshaft and output shafts
- Machined and pressed bearing retaining plates and covers
- Polymer and metal bushings supplied as single items or repair kits
Understanding OEMatch Bearings / Bearing Retaining Plates / Bushes
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original bearings, retaining plates and bushes.
OE (Original Equipment) refers to parts matching original specifications for the bearings, retaining plates and bushes and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM bearings, retaining plates and bushes engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Bearings, retaining plates and bushes support rotating assemblies and keep gearsets correctly aligned. Bearings reduce friction between moving parts, retaining plates fix bearing position and resist axial movement, and bushes absorb side loads and damp vibration. Correct material, heat treatment and machining tolerances are key for reliable service life in Porsche gearboxes.
Benefits Include
- Restored gear alignment and smoother gear engagement
- Reduced friction and lower operating temperatures
- Less vibration and quieter gearbox operation
Why Bearings / Bearing Retaining Plates / Bushes Wear and Fail
- Insufficient or contaminated lubrication leading to accelerated bearing wear
- Heat damage and material fatigue from sustained high loads
- Corrosion and contamination from moisture or debris ingress
The Importance of Replacing with OEMatch Bearings / Bearing Retaining Plates / Bushes
Replacing worn bearings, retaining plates and bushes restores precise shaft support and prevents secondary damage to gears and shafts. Using well-specified replacements reduces the risk of noise, shifting issues and rapid re-wear after a rebuild. For Porsche gearboxes, matching materials and tolerances helps maintain intended clearances and load distribution, which is especially important where high revs and sustained torque are encountered.
Advantages
- Parts selected for Porsche applications and cross-referenced to common original numbers
- Options for standard replacement or upgraded materials where listed
- Kits and individual items to suit full rebuilds or targeted repairs