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Porsche // 997 (911) MK1 2005-2008 // Any
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Transmission main shaft bearing, Four-point. Porsche 964 - 99905209801
99905209801/1
Vehicle Group
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Information
Transmission main shaft bearing, Four-point.
This four-point contact bearing is used in the manual transmission main/input shaft area on Porsche 964 applications. Four-point contact bearings are designed to manage combined loads in compact packaging - supporting stable shaft positioning and smooth rotation under varying operating conditions.
Fits:
Porsche 964 1989 - 1994
Diagram ref no 16
A worn bearing can introduce vibration, noise, imprecise shifting, and accelerated wear of related transmission components. Replacing it during gearbox servicing helps restore smooth operation, correct shaft support, and long-term reliability - especially important on performance-oriented drivetrains like the Porsche 964.
It supports the transmission main shaft and helps keep internal gear alignment stable under load. By maintaining correct shaft position, it reduces friction, noise, and wear - supporting smoother shifting and consistent drivetrain performance.
Function:
• Provides precise main/input shaft support inside the gearbox
• Helps manage axial and radial loads through four-point contact design
• Maintains correct gear mesh alignment to reduce wear and noise
• Supports smooth rotation and consistent transmission performance
Transmission bearings are critical to shaft stability and gear alignment. If this bearing wears, it can lead to whining noises, vibration, shifting issues, and increased wear on gears and synchros. Replacing it with an OE Match bearing helps restore gearbox integrity and protects more expensive transmission components.
When to replace:
• Gearbox whining, rumbling, or grinding noises
• Vibration or roughness that changes with speed/load
• Excessive shaft play found during teardown/inspection
• During gearbox rebuild/overhaul (preventative replacement)
• Visible pitting, heat marks, or rough rotation on the bearing
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905209801
The product you are viewing cross references to these numbers
This four-point contact bearing is used in the manual transmission main/input shaft area on Porsche 964 applications. Four-point contact bearings are designed to manage combined loads in compact packaging - supporting stable shaft positioning and smooth rotation under varying operating conditions.
Fits:
Porsche 964 1989 - 1994
Diagram ref no 16
A worn bearing can introduce vibration, noise, imprecise shifting, and accelerated wear of related transmission components. Replacing it during gearbox servicing helps restore smooth operation, correct shaft support, and long-term reliability - especially important on performance-oriented drivetrains like the Porsche 964.
It supports the transmission main shaft and helps keep internal gear alignment stable under load. By maintaining correct shaft position, it reduces friction, noise, and wear - supporting smoother shifting and consistent drivetrain performance.
Function:
• Provides precise main/input shaft support inside the gearbox
• Helps manage axial and radial loads through four-point contact design
• Maintains correct gear mesh alignment to reduce wear and noise
• Supports smooth rotation and consistent transmission performance
Transmission bearings are critical to shaft stability and gear alignment. If this bearing wears, it can lead to whining noises, vibration, shifting issues, and increased wear on gears and synchros. Replacing it with an OE Match bearing helps restore gearbox integrity and protects more expensive transmission components.
When to replace:
• Gearbox whining, rumbling, or grinding noises
• Vibration or roughness that changes with speed/load
• Excessive shaft play found during teardown/inspection
• During gearbox rebuild/overhaul (preventative replacement)
• Visible pitting, heat marks, or rough rotation on the bearing
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905209801
99905209800
99905209801
99905209400
99905208700
The product you are viewing cross references to these numbers
Price: £145.00
Orderable
Related products
Vehicle Group
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Information
Needle roller gearbox bearing set (4pcs)
First, Third, Fourth and reverse needle bearings all sit upon one shaft.
Fits:
Porsche 997 MK1 2005-2008
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99730292100
The product you are viewing cross references to these numbers
First, Third, Fourth and reverse needle bearings all sit upon one shaft.
Fits:
Porsche 997 MK1 2005-2008
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99730292100
99730292100
997.302.921.00
The product you are viewing cross references to these numbers
Price: £323.23
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
Click 'Zoom in' for large parts diagram.
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
Click 'Zoom in' for large parts diagram.
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: £660.75
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 GT2 RS 2011-13
Information
Gearbox cylindrical roller bearing. 40 x 90 x 23
Fits:
Porsche 911 Carrera 1987-89 Manual 5-Speed
Porsche 930 Turbo 1989 Manual 5-Speed
Porsche 964 C2 / C4 / RS / Turbo 1989-94
Porsche 993 1995-98
Porsche 996 Turbo / GT2 2001-05
Porsche 997 GT2 / GT2 RS 2008-11
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-09
Click 'Zoom in' for large parts diagram.
Diagram ref no 24
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911011901
The product you are viewing cross references to these numbers
Fits:
Porsche 911 Carrera 1987-89 Manual 5-Speed
Porsche 930 Turbo 1989 Manual 5-Speed
Porsche 964 C2 / C4 / RS / Turbo 1989-94
Porsche 993 1995-98
Porsche 996 Turbo / GT2 2001-05
Porsche 997 GT2 / GT2 RS 2008-11
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-09
Click 'Zoom in' for large parts diagram.
Diagram ref no 24
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911011901
99911011901
The product you are viewing cross references to these numbers
Price: £585.52
Orderable
Vehicle Group
- 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
Information
Cylindrical roller bearing. 35 x 80 x 18
Fits:
Porsche 996 Turbo / GT2 2001-05
Porsche 997 GT2 / GT2 RS 2008-11
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-09
Click 'Zoom in' for large parts diagram.
Diagram ref no 24
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911010901
The product you are viewing cross references to these numbers
Fits:
Porsche 996 Turbo / GT2 2001-05
Porsche 997 GT2 / GT2 RS 2008-11
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-09
Click 'Zoom in' for large parts diagram.
Diagram ref no 24
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911010901
99911010901
The product you are viewing cross references to these numbers
Price: £535.42
In stock