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Porsche // 964 (911) (1989-1994) // 964 (911) C4 1989-93
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- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
For Cars With 6-Speed Manual Gearbox ONLY!
Fits:
Porsche 986 Boxster 1997>>2004
Porsche 996 Carrera 2 / 4 1998>>2001
Diagram Ref No 11
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99630204100
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
Fits:
Porsche 964 1989-94
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96430290701
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
Fits:
Porsche 911 - 1986 to 1989
Porsche 964 - 1989 to 1994
Available with different gear ratios - example - 10:31 (number of teeth on each gear) - 3.10:1 (gear ratio)
10:31 - 3.10:1
9:31 - 3.44:1
8:32 - 4.00:1
8.33 - 4.125:1
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030291107
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- 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
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
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
Synchronizing Hub With Locking Collar, 5th / Reverse Gear
Genuine Porsche synchronising hub / guide sleeve with locking collar for 5th and reverse gear, designed for Porsche 911 and 964 models fitted with the applicable G50 5-speed manual transmission.
Fits:
Porsche 911 Carrera 3.2L 1978 - 1989
with G50/00, /01, /02
gearbox
Porsche 911 Turbo 3.3L (930) 1989 with G50/50
gearbox
Porsche 964 Carrera 2 3.6L 1990 - 1994 with G50/03, /04, /05
gearbox
Porsche 964 Carrera RS 3.6L / RS 3.8L
1992–1993
with G50/10 gearbox
Porsche 964 Turbo 3.3L / 3.6L 1991 - 1994 with G50/52 gearbox
* Check fitment for your specific vehicle (model, year, engine) before ordering. Confirm the gearbox type as well: the supplied application notes specify a five-speed transmission and reverse gear, rather than every transmission fitted to these models.
Diagram ref no 41
This original Porsche gearbox component forms part of the transmission's 5th and reverse gear engagement mechanism. It works with the synchroniser and selector assembly to allow the appropriate gear to be selected and engaged.
Manufactured to the original Porsche specification, it is an essential replacement component when repairing worn gear engagement parts, rebuilding a G50 transmission or restoring the correct operation of the manual gearbox.
This component forms part of the internal gearbox gear-selection assembly.
What This Part Does / Functions
- Supports engagement of 5th and reverse gears
- Works with the gearbox synchroniser and selector mechanism
- Slides into the required position during gear selection
- Helps transmit the selector movement to the relevant gear engagement components
- Supports correct mechanical engagement of the selected gear
- Replaces a worn or damaged original operating sleeve
- Helps restore normal 5th and reverse gear selection when sleeve wear is the confirmed cause
- Maintains the factory Porsche G50 gearbox configuration.
Why Replace This Part?
The synchroniser guide sleeve is subjected to repeated mechanical loading whenever the corresponding gears are selected. Over time, the sleeve's engagement teeth and contact surfaces can become worn, chipped or damaged. Excessive wear may cause difficult gear engagement, resistance during shifting or problems maintaining proper engagement.
Replacing the damaged sleeve with a Genuine Porsche gearbox component helps restore the correct mechanical arrangement of the transmission.
Common Symptoms of a Worn Synchronising Hub / Guide Sleeve
- Difficulty selecting 5th gear
- Difficulty engaging reverse gear
- Gear selection feels rough or notchy
- Excessive resistance when selecting the affected gears
- Gear engagement becomes inconsistent
- Damaged or rounded engagement teeth
- Unusual mechanical noise during gear selection
- Worn sleeve discovered during gearbox disassembly
- Gear jumping out of engagement where internal wear is present
These symptoms may also result from worn synchroniser rings, selector forks, gear engagement teeth or gearbox adjustment faults.
A complete transmission inspection is recommended before replacing internal components.
When to Replace This Part
- During G50 gearbox rebuilding
- When 5th or reverse gear engagement components are worn
- If the locking collar or guide sleeve is chipped or damaged
- When repairing difficult gear selection
- During replacement of associated synchroniser components
- If excessive wear is discovered during gearbox disassembly.
Where It Fits on the Car
The guide sleeve is fitted inside the G50 manual gearbox, within the 5th and reverse gear selector and engagement assembly. It works alongside the relevant synchroniser components, selector fork and gear engagement mechanism. The gearbox must be dismantled to access and replace the sleeve.
Related reference numbers
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95030402105
The product you are viewing cross references to these numbers