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Porsche > 993 (911) (1994-1998) > 993 (911) C4 1994-97 > Gearbox / Transmission >

Gearbox Parts

Gearbox Parts

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DISPLAYING 1 to 16 (of 52 products)
1 2 3 4
Bearing bush transmission. Porsche 911 / 964 / 993 / 928
2
Bearing bush transmission. Porsche 911 / 964 / 993 / 928
Special Order item
99920300300
Product Information
Product Information
Bearing bush transmission.16 x 22 x 20.
Sold each.

porsche

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
Bearing bush transmission. Porsche 911 / 964 / 993 / 928 - 99920300300
3
Bearing bush transmission. Porsche 911 / 964 / 993 / 928
99920300300/1
Product Information
Product Information
Bearing bush transmission.16 x 22 x 20.
Sold each.

oematch

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

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99920300300
99920300300

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Billet gearbox end cover Porsche 993 G64/20/21
6
Billet gearbox end cover Porsche 993 G64/20/21
CMS.993.EC
Product Information
Product Information
cms

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
Bush For Gearshift Rod, 16x22x27. Porsche 911 / 959 / 964 / 993 1987-98 - 99920300410, 99920300400
3
Bush For Gearshift Rod, 16x22x27. Porsche 911 / 959 / 964 / 993 1987-98
Special Order item
99920300410
Product Information
Product Information
Bush For Gearshift Rod, 16x22x27. 

Fits:
Porsche 911 1987>>1989 (5-Speed Gearbox)
Porsche 959 1987>>1988
Porsche 964 Carrera 2 / 4 1989>>1994 (5-Speed Gearbox)
Porsche 993 Carrera 2 / 2S 1994>>1997 (6-Speed Gearbox)
Porsche 993 Carrera 4 / 4S 1994>>1997 (6-Speed Gearbox)
Porsche 993 Carrera RS 1994>>1997 (6-Speed Gearbox)
Porsche 993 Turbo 1994>>1996 (6-Speed Gearbox)

Diagram Ref No 22

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99920300410
99920300410
99920300400

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Cylindrical roller bearing. Porsche 911 / 964 / 993 - 99911010901
3
Cylindrical roller bearing. Porsche 911 / 964 / 993
Special Order item
99911010901::1
Product Information
Product Information
Cylindrical roller bearing. 35 x 80 x 18

porsche

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

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99911010901
99911010901

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Cylindrical roller bearing. Porsche 911 / 964 / 993 - 99911010901
3
Cylindrical roller bearing. Porsche 911 / 964 / 993
99911010901/1
Product Information
Product Information
Cylindrical roller bearing. 35 x 80 x 18

oematch

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

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99911010901
99911010901

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Cylindrical roller bearing. Porsche 993 - 19383, 99911019200
3
Cylindrical roller bearing. Porsche 993
99911019200/1::1
Product Information
Product Information
Cylindrical roller bearing. 30 x 62 x 16.

oematch

Fits:
Porsche 993 1995-98

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Diagram ref no 22

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99911019200
19383
99911019200

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Cylindrical roller bearing. Porsche 993 - 99911019200
2
Cylindrical roller bearing. Porsche 993
Special Order item
99911019200
Product Information
Product Information
Cylindrical roller bearing. 30 x 62 x 16.

porsche

Fits:
Porsche 993 1995-98

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Diagram ref no 22

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99911019200
99911019200

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Cylindrical roller bearing. Porsche 993 - 99911019401
2
Cylindrical roller bearing. Porsche 993
Special Order item
99911019401
Product Information
Product Information
Cylindrical roller bearing. 25 x 52 x 15.

porsche

Fits:
Porsche 993 1995-98

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Diagram ref no 23

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99911019401
99911019401

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Cylindrical roller bearing. Porsche 993 - 19384, 99911019401
2
Cylindrical roller bearing. Porsche 993
99911019401/1
Product Information
Product Information
Cylindrical roller bearing. 25 x 52 x 15.

oematch

Fits:
Porsche 993 1995-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 23

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99911019401
19384
99911019401

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Deep Groove Ball Bearing. Porsche 964 C4 / 993 - 99905214302
2
Deep Groove Ball Bearing. Porsche 964 C4 / 993
Special Order item
99905214302
Product Information
Product Information
Deep Groove Ball Bearing. 30 x 55 x 9.
porsche

Fits:
Porsche 964 C4 1989-94
Porsche 993 C2 / C4 / Turbo 1995-98

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Diagram ref no 10

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99905214302
99905214302

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Differential Taper Roller Bearing. Porsche 964 / 993 1989-98 - 99905911100
4
Differential Taper Roller Bearing. Porsche 964 / 993 1989-98
Special Order item
99905911100
Product Information
Product Information
Differential Taper Roller Bearing.

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
99905911100

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Differential Taper Roller Bearing. Porsche 964 / 993 1989-98 - 99905911100 - G-TRB-5HP19FLA/FLA-DIF
4
Differential Taper Roller Bearing. Porsche 964 / 993 1989-98
99905911100/1
Product Information
Product Information
Differential Taper Roller Bearing.

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
99905911100

The product you are viewing cross references to these numbers
Gasket gearbox casing. Porsche 911 / 964 / 993 - 95030119101
2
Gasket gearbox casing. Porsche 911 / 964 / 993
95030119101/1
Product Information
Product Information
Gasket gearbox casing. 

oematch

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



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95030119101
95030119101

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Gear housing. Porsche 993 1994-1998 - 95030101108, 95030101110
5
Gear housing. Porsche 993 1994-1998
Special Order item
95030101110
Product Information
Product Information
Gear housing.

porsche

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

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95030101110
95030101108
95030101110

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Gear set 1st / 2nd. Porsche 993 C2 / C4 - 99330290123
3
Gear set 1st / 2nd. Porsche 993 C2 / C4
Special Order item
99330290123
Product Information
Product Information
Gear set 1st / 2nd.
Z = 42 : 11 1.gear
Z = 43 : 20 2.gear

porsche

Fits:
Porsche 993 C2 / C4 1994-98 (G5021 / G6421)


Click 'Zoom in' for large parts diagram.
Diagram ref no. 1

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99330290123
99330290123

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DISPLAYING 1 to 16 (of 52 products)
1 2 3 4
Also found on these pages
About Gearbox Parts

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.

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