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Porsche 996 (911) (1997-2005) 996 TURBO 2000-05 Gearbox / Transmission Gearbox Parts

Gearbox Gears / Crown Wheel and Pinion

Gearbox Gears / Crown Wheel and Pinion

DISPLAYING 1 to 3 (of 3 products)
Ring Gear and Pinion Shaft. Porsche 996 Turbo - 99630291170
5
Ring Gear and Pinion Shaft. Porsche 996 Turbo
Special Order item
99630291170
Product Information
Product Information
Ring Gear and Pinion Shaft. 31 : 9.


Fits:
Porsche 996 Turbo 2001-05 G96.50



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99630291170
99630291170

The product you are viewing cross references to these numbers
Synchronising Hub with Operating Sleeve. Porsche 993 / 996 Turbo / GT2 / GT3 / 997 Turbo / GT2 / GT3 - 95030402123
3
Synchronising Hub with Operating Sleeve. Porsche 993 / 996 Turbo / GT2 / GT3 / 997 Turbo / GT2 / GT3
Special Order item
95030402123
Product Information
Product Information

Porsche guide sleeve assembly, comprising a synchronising hub and operating sleeve, for the specified 993, 996 and 997 manual transmissions. Gear-pair allocation depends on the gearbox: the diagrams identify both 3rd/4th-gear and 5th/6th-gear positions.

Fits

  • Porsche 993 Carrera G50.20/21, 1995 onwards
    Supplied variants: 993 (911) C2 1994–97; 993 (911) C2S 1994–97.
  • Porsche 993 Carrera 4 G64.20/21, 1995 onwards
    Supplied variants: 993 (911) C4 1994–97; 993 (911) C4S 1994–97.
  • Porsche 993 Carrera RS G50.31/32/33, 1994–98
    Supplied variant: 993 (911) RS 1994–97.
  • Porsche 993 Turbo G64.51, 1994–98
    Supplied variants: 993 (911) TURBO 1994–96; 993 (911) TURBO S 1994–97.
  • 993 (911) GT2 1994–97.
  • Porsche 996 Turbo and Turbo X50 G96.50, 2001–05 — 5th/6th gear
    Supplied model coverage: 996 TURBO 2000–05.
  • Porsche 996 GT2 G96.88, 2001–05 — 5th/6th gear
  • Porsche 996 GT3-1 G96.90, 2000–01; G96.93, 2001; G96.96, 2004–05 — 5th/6th gear
    Supplied variants: 996 GT3 MKI 1999–02; 996 GT3 MKII 2003>>; 996 GT3 RS 2003–04.
  • Porsche 997.1 Turbo GT2 G97.88, 2008–09, and 997.1 GT2 RS G97.88, 2011 — 5th/6th gear
    Supplied variants: 997 MK1 TURBO 2007–09; 997 MK1 GT2 2007–09.
  • Porsche 997 GT3 G97.90, up to 2009 — 5th/6th gear
    Supplied variants: 997 MK1 GT3 / GT3 RS 2007–09.
  • Porsche 997 GT3 / GT3 RS G97.90/92, 2010 onwards — 5th/6th gear
    Supplied variants: 997 MKII GT3 / GT3 RS 2010–11.
  • Porsche 997.2 GT2 RS G97.88, 2011 — 5th/6th gear
    Supplied model coverage: 997 MKII GT2 RS 2011–13; the corresponding diagram also uses G9788.

Confirm the vehicle's model, production year, engine, gearbox designation and transmission serial number before ordering. The model-year listings do not replace the gearbox-specific restrictions.

What This Product Does

Within the manual transmission, this assembly connects gear selection with the synchronising mechanism. Movement of the sleeve allows the selected gear to couple to its shaft; matching the sleeve to the correct transmission and gear position is essential.

Functions

  • Provides the hub and sliding sleeve used for gear engagement.
  • Works with the associated synchroniser components during selection.
  • Serves the gear pair identified for each applicable gearbox.

Technical Details

  • Porsche identification number: 95030402123.
  • Diagram terminology: guide sleeve; synchronising hub and operating sleeve assembly.
  • Specified 993 3rd/4th-gear version: internal dimension 33.66 mm.
  • 993 transmission serial-number restrictions: G50.20 1 002694 >>; G50.20 2 002174 >>; G50.21 1 005073 >>; G50.21 2 003095 >>. Associated production remark: 95-95-95-95-.
  • The 993 diagram also identifies a 5th/6th-gear position. Later listed 996 and 997 diagrams identify this component for 5th/6th gear.
  • Recorded diagram quantity: 1 for each applicable position; this is not a statement of package contents.

Symptoms of Fault

Possible indications include resistance when selecting the relevant gears, a crunch during shifts, unreliable engagement or jumping out of gear. Inspection may reveal scoring, looseness or damaged engagement surfaces. Metallic particles in gearbox oil suggest internal deterioration but do not identify this sleeve alone as the cause.

Why Replacement Matters

Renewal is appropriate when inspection confirms damage or wear affecting engagement. During dismantling, assess adjacent gear teeth, synchroniser rings, springs, engagement pieces and bearings. Check the clutch, selector linkage and lubricant specification as well, since faults elsewhere can resemble a sleeve problem.

FAQs

Which gear pair uses this assembly?
The relevant 993 entry specifies 3rd/4th gear, while another 993 position and the listed later transmissions specify 5th/6th gear. Match the diagram position and transmission serial restrictions.

Does a difficult shift prove sleeve failure?
No. Diagnosis should distinguish internal wear from clutch, linkage and lubrication problems before parts are selected.

What should be checked during installation?
A gearbox specialist should examine the neighbouring synchroniser hardware, bearings and gears, then follow the applicable assembly procedures.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95030402123
95030402123

The product you are viewing cross references to these numbers
Thrust Washer For Loose Gear Wheel. Porsche 964 / 993 / 996 / 997 1993-13 - 95030229607
2
Thrust Washer For Loose Gear Wheel. Porsche 964 / 993 / 996 / 997 1993-13
Special Order item
95030229607
Product Information
Product Information
Thrust Washer For Loose Gear Wheel.

Fits:
Porsche 964 Carrera 2/4 5-Speed Manual 1993>>1994
Porsche 993 Carrera 6-Speed Manual 1994>>1998
Porsche 996 Turbo / GT2 6-Speed Manual 2001>>2005
Porsche 996 GT3 MKI / MKII 6-Speed Manual 1999>>2005
Porsche 997.1 Turbo / GT2 MKI 6-Speed Manual 2007>>2009
Porsche 997.2 Turbo / GT2 RS MKII 6-Speed Manual 2010>>2013
Porsche 997 GT3 MKI / MKII 6-Speed Manual 2007>>2011

Diagram Ref No 54

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95030229607
95030229607

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
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About Gearbox Gears / Crown Wheel and Pinion

Porsche Gearbox Gears, Crown Wheel & Pinion Shafts | Precision-Engineered Components for Power and Performance

Gearbox gears, crown wheels, and pinion shafts form the mechanical heart of your Porsche’s transmission and differential systems. These precision-cut components work together to transfer engine torque efficiently to the wheels, ensuring smooth gear changes, optimal traction, and refined performance.

At Design911, we supply high-quality gearbox gears, crown wheel and pinion shaft assemblies designed to meet or exceed original performance standards. Manufactured from case-hardened steel alloys and finished with precision machining, these components deliver exceptional strength, accuracy, and durability — essential for high-performance or classic Porsche applications.

Whether you’re rebuilding a manual gearbox, restoring a differential, or upgrading for motorsport use, our range ensures exact gear ratios, reduced noise, and long-lasting reliability.

What Do Gearbox Gears, Crown Wheel & Pinion Shafts Do?

These components are responsible for managing torque conversion, power delivery, and wheel rotation balance within the gearbox and differential.

Core Functions:

  • Gearbox Gears: Transmit power between shafts to control speed and torque output.
  • Crown Wheel & Pinion Shaft: Transfer torque from the gearbox to the differential, adjusting rotational direction and ratio. Maintain smooth power flow to the driven wheels. Support consistent acceleration and top-speed performance.

Together, they ensure seamless power distribution, responsive acceleration, and refined drivability across all Porsche models.

Why Do Gears, Crown Wheels & Pinion Shafts Fail or Wear Out?

Constant rotational stress, torque loads, and friction cause gradual wear and fatigue. Over time, even the strongest precision gears can lose performance if not properly maintained or lubricated.

Common Causes of Failure Include:

  • Excessive wear from low or contaminated gearbox oil.
  • Pitting, scoring, or chipped teeth from overload or poor lubrication.
  • Misalignment caused by worn bearings or damaged housings.
  • Heat distortion from aggressive driving or track use.
  • Incorrect installation or gear backlash setting errors.

When these components wear or fail, symptoms include whining or grinding noises, loss of smooth shifting, vibration, or inconsistent power delivery to the wheels.

Why Replace or Upgrade Your Porsche Gearbox Gears, Crown Wheel & Pinion Shaft?

Replacing worn or damaged gears, crown wheels, and pinion shafts restores drivetrain precision and ensures optimal torque transfer. Upgrading to performance-engineered components can also improve acceleration, gear engagement, and durability under high load.

Key Benefits:

  • Restores quiet, efficient gearbox and differential operation.
  • Eliminates whining, grinding, or gear backlash issues.
  • Improves power delivery and throttle response.
  • Reduces wear on associated bearings and shafts.
  • Designed for strength, accuracy, and long service life.
  • Available in standard and performance ratio options for Porsche models.

These components should always be replaced during gearbox or differential rebuilds to maintain correct gear alignment and long-term drivetrain reliability.

Highlights

  • Precision-cut Porsche gearbox gears, crown wheel & pinion shafts.
  • Manufactured from high-strength, case-hardened steel.
  • Balanced and finished for minimal noise and wear.
  • Suitable for Porsche 911, Cayman, Boxster, and classic models.
  • Direct-fit replacements for road, restoration, or performance builds.
  • Engineered for smooth, reliable torque transfer and control.       

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