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Mainshaft angular contact bearing. Porsche 911 / 912 / 914 - 99905302501
99905302501/1
Vehicle Group
- 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)
Information
Mainshaft angular contact bearing.
Fits:
Porsche 911 1969-73
Porsche 912 1965-69
Porsche 914 1970-76
Click 'Zoom in' for large parts diagram.
Diagram ref no 26
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905302501
The product you are viewing cross references to these numbers
Fits:
Porsche 911 1969-73
Porsche 912 1965-69
Porsche 914 1970-76
Click 'Zoom in' for large parts diagram.
Diagram ref no 26
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905302501
99905302500
99905302501
The product you are viewing cross references to these numbers
Price: €232.38
Orderable
Related products
Vehicle Group
- 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 964 (911) C2 1989-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- 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
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 914 (1970-1976)
- Porsche 912E 4CYL 1976
Information
Rear left and right differential carrier bearing.
This tapered roller bearing, also known as a differential carrier bearing, is used in the rear output assemblies of the differential and manual transmission on various classic Porsche models. Engineered as a precise OE replacement, it meets the original Porsche specifications for dimensions, load capacity, and tolerance. The bearing installs directly without modification, restoring proper carrier alignment, support, and smooth drivetrain operation.
Sold individually.
Fits:
Porsche 911 1969-1971 * with magnesium pressure cast housing
Porsche 911 1972 - 1989
Porsche 912 1969 * with magnesium pressure cast housing
Porsche 912E 1976
Porsche 914 1970 - 1976
Porsche 930 Turbo 1976-1989
Porsche 911 (964) C2 1989 - 1994 (rear right only)
Porsche 911 (964) Turbo 1990 - 1994 (rear right only)
Porsche 911 (993) 1995 - 1998 (rear right only)
Porsche 924 1976 - 1985
Porsche 928 1978 - 1995
Diagram ref no 8
• Function: This bearing supports and aligns the differential carrier or manual transmission rear output shaft, allowing smooth rotation under load and controlling radial/axial movement of the carrier assembly. It ensures the differential or transmission output runs true, quietly and with minimal friction.
• Position on Car: Usually located in the manual transmission/differential rear housing (for example in the rear of the 911 manual gearbox, or the transaxle/differential carrier area). It may serve as the bearing between the carrier housing and the output shaft or differential ring-gear carrier.
• This part is critical for proper gear meshing, quiet running, bearing life and overall driveline integrity.
With age and use, the bearing can develop wear in its rollers/races, looseness, noise, increased friction, or misalignment. A worn bearing may lead to drivetrain noise, vibration, premature gear or bearing damage, loss of efficiency, or catastrophic failure. The bearing supports the differential carrier output shaft – incorrect bearing performance can result in excessive play, wobble, and stress on neighbouring components.
When to Replace:
• During a differential or transmission rebuild, where the carrier, output shafts or bearings are being replaced — it’s best practice to install new bearings.
• If you detect noise (growl, whine, hum) coming from the rear differential or output area, particularly under load or at higher speed. If there is measurable play / movement in the differential carrier or abnormal backlash in the gearset. If you notice metal debris, “bearing-noise” or vibration emanating from the drivetrain output / differential area.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905902702
The product you are viewing cross references to these numbers
This tapered roller bearing, also known as a differential carrier bearing, is used in the rear output assemblies of the differential and manual transmission on various classic Porsche models. Engineered as a precise OE replacement, it meets the original Porsche specifications for dimensions, load capacity, and tolerance. The bearing installs directly without modification, restoring proper carrier alignment, support, and smooth drivetrain operation.
Sold individually.
Fits:
Porsche 911 1969-1971 * with magnesium pressure cast housing
Porsche 911 1972 - 1989
Porsche 912 1969 * with magnesium pressure cast housing
Porsche 912E 1976
Porsche 914 1970 - 1976
Porsche 930 Turbo 1976-1989
Porsche 911 (964) C2 1989 - 1994 (rear right only)
Porsche 911 (964) Turbo 1990 - 1994 (rear right only)
Porsche 911 (993) 1995 - 1998 (rear right only)
Porsche 924 1976 - 1985
Porsche 928 1978 - 1995
Diagram ref no 8
• Function: This bearing supports and aligns the differential carrier or manual transmission rear output shaft, allowing smooth rotation under load and controlling radial/axial movement of the carrier assembly. It ensures the differential or transmission output runs true, quietly and with minimal friction.
• Position on Car: Usually located in the manual transmission/differential rear housing (for example in the rear of the 911 manual gearbox, or the transaxle/differential carrier area). It may serve as the bearing between the carrier housing and the output shaft or differential ring-gear carrier.
• This part is critical for proper gear meshing, quiet running, bearing life and overall driveline integrity.
With age and use, the bearing can develop wear in its rollers/races, looseness, noise, increased friction, or misalignment. A worn bearing may lead to drivetrain noise, vibration, premature gear or bearing damage, loss of efficiency, or catastrophic failure. The bearing supports the differential carrier output shaft – incorrect bearing performance can result in excessive play, wobble, and stress on neighbouring components.
When to Replace:
• During a differential or transmission rebuild, where the carrier, output shafts or bearings are being replaced — it’s best practice to install new bearings.
• If you detect noise (growl, whine, hum) coming from the rear differential or output area, particularly under load or at higher speed. If there is measurable play / movement in the differential carrier or abnormal backlash in the gearset. If you notice metal debris, “bearing-noise” or vibration emanating from the drivetrain output / differential area.
• When you upgrade or service the manual transmission/differential – matching new components with new bearings ensures optimum alignment, longevity and performance.
Replacing this bearing means you restore correct support and alignment, minimise noise, protect the differential and improve durability. This part is critical for proper gear meshing, quiet running, bearing life and overall driveline integrity.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905902702
99905902700
99905902702
99905902800
The product you are viewing cross references to these numbers
Price: €78.00
In stock
Vehicle Group
- 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
Information
Differential outer bearing, Left. 50 x 90 x 21.7
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
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
99905906400
The product you are viewing cross references to these numbers
Price: €57.60
In stock
Vehicle Group
- 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)
Information
Gearbox cylindrical roller bearing. 30 x 62 x 20
Fits:
Porsche 911 Carrera 1987-89 5-speed MAN
Porsche 911 (930) Turbo 1989 5-speed MAN
Porsche 964 C2 / C4 1989-94 5-Speed MAN
Porsche 964 Carrera 2 RS 1992 5-Speed MAN
Porsche 964 Turbo 1991 5-Speed MAN
Porsche 993 C2 / C4 / C4S 194-98 6-Speed MAN
Porsche 993 Carrera RS 1995 6-Speed MAN
Porsche 993 Turbo 1995-98 6-Speed MAN
Porsche 996 Turbo / GT2 2001-05 6-Speed MAN
Porsche 997 GT2 2008-09 6-Speed MAN
Porsche 997 GT2 RS 2011 6-Speed MAN
Porsche 996 GT3 1999-05 6-Speed MAN
Porsche 997 GT3 / GT3 RS 2007-11 6-Speed MAN
Diagram ref no 27
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911011701
The product you are viewing cross references to these numbers
Fits:
Porsche 911 Carrera 1987-89 5-speed MAN
Porsche 911 (930) Turbo 1989 5-speed MAN
Porsche 964 C2 / C4 1989-94 5-Speed MAN
Porsche 964 Carrera 2 RS 1992 5-Speed MAN
Porsche 964 Turbo 1991 5-Speed MAN
Porsche 993 C2 / C4 / C4S 194-98 6-Speed MAN
Porsche 993 Carrera RS 1995 6-Speed MAN
Porsche 993 Turbo 1995-98 6-Speed MAN
Porsche 996 Turbo / GT2 2001-05 6-Speed MAN
Porsche 997 GT2 2008-09 6-Speed MAN
Porsche 997 GT2 RS 2011 6-Speed MAN
Porsche 996 GT3 1999-05 6-Speed MAN
Porsche 997 GT3 / GT3 RS 2007-11 6-Speed MAN
Diagram ref no 27
Related reference numbers
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99911011701
99911011701
The product you are viewing cross references to these numbers
Price: €211.20
In stock