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Differential carrier bearing. Porsche 914/6 / 911F - 99905900800
99905900800/1
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
Differential carrier bearing
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Related, superseded, cross reference or alternative numbers for comparison.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
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
99905900800
The product you are viewing cross references to these numbers
Price: €56.40
In stock
Also found on these pages
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 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
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
Related, superseded, cross reference or alternative numbers for comparison.
99911011701
99911011701
The product you are viewing cross references to these numbers
Price: €211.20
In stock