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Gearbox Parts
Sold each.

Fits:
Porsche 986 Boxster 1997-04 (G86.00 / G86.01) - 1st and 2nd gear
Porsche 968 1992-95 (G44.000) - 1st gear
Click 'Zoom in' for large parts diagram.
Diagram ref no 7 (for 986 Boxster)
Diagram ref no 37 (for 968)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
012311311D
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- 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

Fits:
Porsche 911 1987-89
Porsche 911 Turbo 1975-89
Porsche 968 1992-95
Porsche 964 C2 / C4 1989-94
Porsche 993 C2 1994-98
Porsche 986 Boxster S 2000-04
Porsche 996 C2 / C4 1998-05
Porsche 996 Turbo GT2 2001-05
Porsche 996 GT3 2000-05
Porsche 997.1 Turbo / GT2 / GT2 RS 2007-09
Porsche 997.2 GT2 RS 2011
Porsche 997 GT3 / GT3 RS 2007-11
Click 'Zoom in' for large parts diagram.
Diagram ref no 11
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905906400
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 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
Sold individually; x2 units required per vehicle.
Fits:
Models equipped with 5-speed manual transmission
Porsche 924 2.0L 1981-85*
Porsche 924S 2.5L 1986-88
Porsche 924 Turbo 1979-85
Porsche 944 2.5L 1982-88
Porsche 944 2.7L 1989-91
Porsche 944 S / S2 1987-91
Porsche 944 Turbo 2.5L 1986-91
Porsche 968 3.0L 1992-95
Diagram ref. 7.
*NOTE: This part is only compatible with 924 models produced from 1981 onwards that feature the conventional shift pattern. It will not fit earlier 5-speed transmissions with the dog-leg layout (where first gear is positioned directly below reverse).
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
016301299A
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- 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

Fits:
Porsche 968 1992-95 (G44.00)
Manual gearbox
Click 'Zoom in' for large parts diagram,
Diagram ref no 29
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
01E311220
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 968 1992-95 (G44.00)
Manual gearbox
Click 'Zoom in' for large parts diagram,
Diagram ref no 29
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
01E311220
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 968 1992-95 (G44.00)
Manual gearbox
Click 'Zoom in' for large parts diagram,
Diagram ref no 43
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
01E311375
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 968 1992-95 (G44.00)
Manual gearbox
Click 'Zoom in' for large parts diagram,
Diagram ref no 43
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
01E311375
The product you are viewing cross references to these numbers
- 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
Comes with custom -8AN fitting, O ring and set screws.
- 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

Fits:
Porsche 924 Turbo / GT 1976-85
Porsche 924 S 1986-88
Porsche 944 1982-91
Porsche 968 1992-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93111617700
The product you are viewing cross references to these numbers
- 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 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- 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
Fits:
For cars with MANUAL transmission
Porsche 924S 1986-88
Porsche 944 1982-91
Porsche 968 1992-95
Diagram ref no 31
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
016311113C
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- 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
For all Porsche 968 6 speed transmissions '92'-'95. (G44/00, 01E)
Our design features include:
A ring gear thrust bolt to reduce ring gear deflection under load
Cross drilled oil passageways for the differential bearing
Replaces part 01E.409.131A
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
01E409131A
The product you are viewing cross references to these numbers
- 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 Item is an Original Porsche Part found by using our original Porsche Part Number Search. If you are ordering parts via this method it is your responsibility to make sure that you enter and purchase the correct products for your vehicle. Please only use the searched product if you are sure of the part numbers as parts cannot be returned if ordered incorrectly.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90008214201L
The product you are viewing cross references to these numbers

Fits:
Porsche 968 1992-95
G4400 Manual gearbox
Click 'Zoom in' for large parts diagram.
Diagram ref no 30
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
012311123
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 968 1992-95
Manual gearbox, G4400
Click 'Zoom in' for large parts diagram.
Diagram ref no 11
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
01E301279
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 968 - 1992 to 1995
Available with different gear ratios - example - 10:33 (number of teeth on each gear) - 3.33:1 (gear ratio)
10:33 - 3.33:1
8:34 - 4.25:1
8:35 - 4.38:1
Diagram ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
01E409143E
The product you are viewing cross references to these numbers
- 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
-
Manual transmission / Central tube (Model: G44.00) 968 1992-95 301-000
-
Manual transmission / Replacement transmission / Transmission case (Model: G44.00) 968 1992-95 302-000
-
Manual transmission / Gear wheel sets (Model: G44.00) 968 1992-95 303-000
-
Manual transmission / Gears and shafts (Model: G44.00) 968 1992-95 303-005
-
Manual transmission / Differential (Model: G44.00) 968 1992-95 305-000
-
Tiptronic / Central tube (Model: A44.00) 968 1992-95 310-000
-
Repair kits / Manual transmission / Tiptronic (Model: G44.00, A44.00) 968 1992-95 398-000
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.