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- 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 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 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Pinion shaft bearing
OE Match pinion shaft bearing for selected Porsche 964, 993, 996 Turbo and 996 GT3 transmissions. Supplied diagram information identifies a four-point or angular-contact bearing measuring 40 × 82 × 18 mm.
Fits:
- Porsche 964 1989 - 1994
- Porsche 993 1995 - 1998
- Porsche 996 Turbo 2001 - 2005
- Porsche 996 GT3 1999 - 2005
Diagram Ref no 25
What This Product Does
This gearbox bearing supports the rotating pinion shaft and helps maintain its position within the transmission. Correct bearing condition is important for shaft alignment and controlled rotation under load.
Functions
- Supports pinion shaft rotation.
- Helps keep the shaft correctly located.
- Limits friction at the bearing interface.
Symptoms of Fault
Possible signs include speed-related whining, rumbling, excessive shaft movement or metallic debris in gearbox oil. These symptoms require diagnosis: clutch, linkage, mounts and lubrication faults can produce similar complaints.
Why Replacement Matters
Renewing a worn bearing helps address unwanted shaft movement and rough rotation during transmission repairs. Inspect neighbouring bearings, gears, seals and retaining components during dismantling rather than assuming this bearing alone explains every symptom.
FAQs
Can just one bearing be renewed?
It may be appropriate after inspection, but the condition of the remaining transmission components should guide the repair.
Does gearbox oil specification matter?
Yes. Use the lubricant specified for the particular transmission; changing oil does not repair mechanical bearing damage.
How should compatibility be checked?
Compare reference 99730229300, the vehicle details and the gearbox code before selecting the bearing.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905222701
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 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) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- 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 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 914 (1970-1976)
Gearbox cylindrical roller bearing. 30 x 62 x 20
OE Match cylindrical roller bearing for the gearbox assemblies of selected Porsche models. Its supplied dimensions are 30 x 62 x 20 mm, with five-speed and six-speed manual applications detailed below.
Fits
For cars with 5-speed MANUAL transmission
Porsche 911 Carrera 1987 - 1989
Porsche 911 (930) Turbo 1989
Porsche 964 C2 / C4 1989 - 1994
Porsche 964 Carrera 2 RS 1992
Porsche 964 Turbo 1991
For cars with 6-speed MANUAL transmission
Porsche 993 C2 / C4 / C4S 1994 - 1998
Porsche 993 Carrera RS 1995
Porsche 993 Turbo 1995 - 1998
Porsche 996 Turbo / GT2 2001 - 2005
Porsche 997 GT2 2008 - 2009
Porsche 997 GT2 RS 2011
Porsche 996 GT3 1999 - 2005
Porsche 997 GT3 / GT3 RS 2007 - 2011
Diagram ref no 27
What This Product Does
The bearing supports rotating components within the transmission, helping maintain their alignment while limiting friction. It is an internal gearbox component, rather than a clutch release bearing or retaining plate.
Functions
- Support rotation within the gearbox assembly.
- Help locate transmission components accurately.
- Limit friction at the bearing interface.
Symptoms of Fault
- Whining or rumbling from the transmission.
- Excessive movement in a supported shaft.
- Metallic debris discovered during an oil inspection.
- Visible bearing discolouration or damaged rolling surfaces.
Why Replacement Matters
A worn bearing can allow unwanted movement and contribute to further internal wear. During repair or rebuilding, inspect neighbouring bearings, shaft surfaces, retaining components and lubrication condition rather than treating noise alone as proof of this bearing's failure.
FAQs
- Does gearbox noise confirm a faulty bearing?
No. Oil condition, mounts, clutch components and other internal parts can produce similar symptoms, so diagnosis should precede replacement. - Can only one bearing be renewed?
A single replacement may be appropriate after inspection. A gearbox rebuild should include an assessment of the other bearings and supporting components. - What should be checked before fitting?
Verify the transmission code, original reference and dimensions, then assess adjacent components and use the specified gearbox lubricant.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911011701
The product you are viewing cross references to these numbers
- 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) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- 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 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT2 RS 2011-13
OE Match spec cylindrical roller bearing used in the manual gearbox/transmission of many Porsche models. It is sized 40 mm (inner) × 90 mm (outer) × 23 mm and is engineered to deliver reliable rotational support under high load conditions. This bearing is manufactured to match original Porsche specifications for fit, durability and performance.
Fits:
Porsche 911 Carrera 1987 - 1989 Manual 5-Speed
Porsche 930 Turbo 1989 Manual 5-Speed
Porsche 964 C2 / C4 / RS / Turbo 1989 - 1994
Porsche 993 1995 - 1998
Porsche 996 Turbo / GT2 2001 - 2005
Porsche 997 GT2 / GT2 RS 2008 - 2011
Porsche 996 GT3 2000 - 2005
Porsche 997 GT3 2007 - 2009
Diagram ref no 24
This cylindrical roller bearing allows smooth, low-friction rotation of gearbox shafts and associated components - particularly supporting countershafts, pinion shafts or output shafts depending on application. It helps to: Reduce internal friction for efficient power transfer. Support heavy radial loads within the gearbox. Maintain alignment and rotational precision of rotating components. Extend gearbox life by minimising wear on other transmission parts.
Function
In a manual gearbox, precision bearings handle radial and axial loads while components rotate at high speed. A cylindrical roller bearing like 99911011901 uses multiple rollers to increase load capacity and distribute stress evenly - making it suitable for demanding transmission environments. They are commonly employed on gearbox countershafts and output shafts to provide support and smooth rotation.
Gearbox bearings wear with time due to heat, load, and continuous rolling motion. A worn or failing bearing can cause:
• Gear noise or rumble
• Rough or imprecise shifting
• Increased transmission wear
• Vibration or loss of smoothness
• Premature gearbox failure
Replacing worn bearings with OE Match quality parts restores correct internal support, improves transmission feel, reduces noise and prolongs the life of your gearbox. Regular maintenance or rebuilds almost always include renewed bearings for best performance.
Replace this bearing if you notice:
• Persistent transmission noise or whining
• Vibration or unusual gear feel
• Gearbox overhaul / rebuild service
• Rough or inconsistent shifting
• Metal particles in transmission fluid
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911011901
The product you are viewing cross references to these numbers