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Gearbox Parts
- 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
- 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Related, superseded, cross reference or alternative numbers for comparison.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 964 (911) C4 1989-93
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97

This conversion was originally designed for mid-engine installations using an AWD 6 speed transmission - but can also be used in rear engine applications.
The end plate is available in two versions, 5 speed G50 or 6 speed 993 and with or without a provision for the shift shaft. This conversion requires either the c4 5 speed or c4 6 speed gear housing to be used in conjunction.
This can be useful for 6 speed AWD to 2 wheel drive conversions, or to replace the no longer available 6 speed 2WD gear housing.
Note: Please specify whether you want with or without shift shaft provision when ordering. The price is the same regardless.
Compatible with housing 964.301.915.05 or 964.301.103.07 from G64/00, G64/01, G64/20, G64/21, G64/51, G64/52
- 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 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 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 993 1995-98
Click 'Zoom in' for large parts diagram.
Diagram ref no 22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911019200
The product you are viewing cross references to these numbers
- 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 993 1995-98
Click 'Zoom in' for large parts diagram.
Diagram ref no 22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911019200
The product you are viewing cross references to these numbers
- 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 993 1995-98
Click 'Zoom in' for large parts diagram.
Diagram ref no 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911019401
The product you are viewing cross references to these numbers
- 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 993 1995-98
Click 'Zoom in' for large parts diagram.
Diagram ref no 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911019401
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
The Differential Taper Roller Bearing is a genuine Porsche drivetrain component designed to support and stabilise rotating differential components while allowing them to operate smoothly under heavy load. Tapered roller bearings are specifically engineered to handle both radial and axial forces, making them ideal for high-stress drivetrain applications such as the differential assembly.
Fits:
- 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
Diagram Ref No 41
What This Product Does:
- Supports rotating differential gears and shafts
- Handles both radial and axial loads within the drivetrain
- Reduces friction between moving components
- Maintains proper alignment of differential parts
- Ensures smooth and efficient power transfer to the wheels
Symptoms Of Wear Or Failure:
- Whining or humming noise from the differential area
- Grinding noises during acceleration or deceleration
- Vibration felt through the drivetrain
- Excessive play in drivetrain components
- Metal particles found in differential oil
- Uneven or abnormal drivetrain noise at certain speeds
Why Replacement Matters:
- Restore smooth differential operation
- Reduce drivetrain noise and vibration
- Maintain correct gear alignment
- Protect differential gears and shafts
- Avoid costly differential repairs or rebuilds
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905911100
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
The Differential Taper Roller Bearing is a OE MATCH drivetrain component designed to support and stabilise rotating differential components while allowing them to operate smoothly under heavy load. Tapered roller bearings are specifically engineered to handle both radial and axial forces, making them ideal for high-stress drivetrain applications such as the differential assembly.
Fits:
- 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
Diagram Ref No 41
What This Product Does:
- Supports rotating differential gears and shafts
- Handles both radial and axial loads within the drivetrain
- Reduces friction between moving components
- Maintains proper alignment of differential parts
- Ensures smooth and efficient power transfer to the wheels
Symptoms Of Wear Or Failure:
- Whining or humming noise from the differential area
- Grinding noises during acceleration or deceleration
- Vibration felt through the drivetrain
- Excessive play in drivetrain components
- Metal particles found in differential oil
- Uneven or abnormal drivetrain noise at certain speeds
Why Replacement Matters:
- Restore smooth differential operation
- Reduce drivetrain noise and vibration
- Maintain correct gear alignment
- Protect differential gears and shafts
- Avoid costly differential repairs or rebuilds
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905911100
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 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 - 1987 to 1989 (G50 gearbox)
Porsche 911 turbo - 1989 (G50 gearbox)
Porsche 964 Carrera 2 - 1990 to 1994
Porsche 993 C2 / C4 / RS - 1994 to 1997
Porsche 993 turbo - 1994 to 1997
Click 'Zoom in' for large parts diagram.
Diagram ref no 16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030119101
The product you are viewing cross references to these numbers
- 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 993 1994-98
G50.20/G50.21/G50.31/G50.33/G64.20/G64.21/G64.51
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030101110
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
While some models are machined from the factory, some will need additional machine work. This is a great solution for a G50 car with low ground clearance that needs an oil cooler.
Machined in house from 6061 billet aluminum
Nicely beveled edges; high attention to detail
VDO 300F temp sender included
-8AN adapter included
Mounting hardware included
For all G50's '87-'98 except C4 5 speed
Not for inverted/mid engine gearboxes
G50/00, G50/01, G50/50, G50/03, G50/04, G50/05, G50/20, G50/21, G50/31, G50/32, G50/33, G64/51, G64/52
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030137100
The product you are viewing cross references to these numbers
- 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) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- 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 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 Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
Replaces part 950.301.312.51, 950.301.312.52, 996.301.312.50; 996.301.312.51
G50/52, G64/51, G64/52, G96/50, G96/88, G96/90, G96/93, G96/96, G96/97, G97/88, G97/96
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99630131251
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) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97

Fits
Porsche 911 1987-89 G50.00/01/02
Porsche 964 1989-94
Porsche 993 CARRERA 2/4/4S 1995-98 G50.20/21 G64.20/21
Porsche 993 CARRERA RS 1995 G50.31/32/33
Porsche 993 TURBO 1995-98 G64.51
Click 'Zoom in' for large parts diagram.
Diagram ref no 14
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030310300
The product you are viewing cross references to these numbers
-
replacement transmission ready for installation and transmission case for 993 CARRERA G50.20/21, 993 CARRERA 4 G64.20/21 (1995 onwards) and 993 CARRERA RS G50.31/32/33 1994-98 302-00
-
replacement transmission ready for installation and transmission case 993 TURBO G64.51 1994-98 302-01
-
gear housing transmission cover for 993 CARRERA G50.20/21, 993 CARRERA RS G50.31/33, 993 CARRERA 4 G64.20/21 (1995 onwards) and 993 TURBO G64.51 1994-98 302-05
-
gear shift and rod shift fork for 993 CARRERA G50.20/21, 993 CARRERA 4 G64.20/21 (1995 onwards), 993 CARRERA RS G50.31/32/33 and 993 TURBO G64.51 1994-98 304-00
-
tiptronic differential, differential housing 993 CARRERA A50.04/05 1994-98 320-03
High-Quality Gearbox Parts for Smooth, Precise and Long-Lasting Transmission Performance
Gearbox parts are at the heart of your vehicle’s transmission system, ensuring power is transferred smoothly from the engine to the wheels. These components—including gears, synchros, bearings, selector mechanisms, seals and shafts—must operate with precision to provide crisp gear changes, reduced drivetrain noise and optimal driving performance. Whether you’re rebuilding a worn transmission, upgrading for performance, or repairing specific issues, choosing the right gearbox parts is essential for long-term reliability.
What Gearbox Parts Do
Transmission components work together to manage torque
delivery and gear selection.
Their key roles include:
- Enabling
smooth gear shifting through synchroniser assemblies
- Transferring
power efficiently from engine to drivetrain
- Maintaining
correct gear alignment via bearings, shafts and selectors
- Reducing
friction and heat with precision-machined internal components
- Ensuring
responsive and reliable gear engagement under all driving conditions
- Supporting high-load and performance driving with upgraded materials and tolerances
When these parts are in good condition, the gearbox operates quietly, engages gears cleanly and delivers consistent performance.
Why Gearbox Parts Commonly Fail
Gearboxes experience constant mechanical load, friction and
temperature cycles. Over time, internal components can weaken or wear out due
to:
- Synchro
ring wear causing notchy or difficult gear engagement
- Bearing
failure leading to whining, vibration or misalignment
- Gear
tooth damage from aggressive shifting or lubrication issues
- Worn
selector forks or linkages affecting precision and feel
- Oil
contamination accelerating wear on bearings and synchros
- Leaking
seals causing low lubrication levels
- High-mileage fatigue in shafts, pins and internal hardware
Even small failures can quickly escalate into major transmission issues if not addressed in time.
Why You Should Replace Worn Transmission Components
Replacing ageing or damaged gearbox parts with high-quality, precision-engineered alternatives designed to match original performance standards ensures your transmission remains smooth, durable and reliable.
Benefits of replacing worn parts include:
- Restored smooth gear changes and reduced notching
- Improved drivetrain efficiency and power delivery
- Reduced internal wear and noise
- Enhanced lifespan of other transmission components
- Prevention of costly gearbox failure
- Confidence in both daily driving and performance applications
A refreshed gearbox not only improves driving enjoyment but also protects the significant investment in your vehicle’s drivetrain.