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- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
The OE Match 1st Gear Synchro Ring is a high-quality replacement transmission component designed to facilitate smooth and precise engagement of first gear in Porsche manual gearboxes. Manufactured to OE specifications for fit, accuracy and durability, this synchroniser ring forms a critical part of the gearbox synchronisation system, helping to match gear and shaft speeds before engagement occurs.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
Diagram Ref No 39
Working alongside the synchroniser hub, dog teeth and selector sleeve, the synchro ring reduces speed differences between rotating gearbox components, allowing gears to engage smoothly without excessive noise, grinding or wear. Precision engineering ensures reliable operation and helps maintain the shift quality expected from a Porsche transmission.
What This Product Does:
- Synchronises rotational speeds before first gear engagement.
- Helps ensure smooth and precise gear changes.
- Reduces gear clash and grinding during shifting.
- Works with the synchroniser assembly and dog teeth.
- Improves transmission shift quality and drivability.
- Minimises wear on gearbox engagement components.
- Supports reliable operation of the manual transmission.
Symptoms Of Wear Or Failure:
- Difficulty selecting first gear.
- Gear grinding or crunching during engagement.
- Increased resistance when shifting into first gear.
- Notchy or inconsistent gear changes.
- Requirement to force the gear lever into position.
- Excessive gearbox noise during shifting.
- Premature wear of dog teeth and related synchroniser components.
- Poor shift quality, particularly when the gearbox is cold.
Why Replacement Matters:
- Synchroniser rings are subjected to constant friction and wear every time a gear is selected. Over time, the friction surfaces can wear down, reducing their ability to equalise rotational speeds effectively before gear engagement. This can lead to difficult gear selection, increased transmission noise and accelerated wear of surrounding gearbox components.
- A worn synchro ring can place additional strain on dog teeth, selector sleeves and synchroniser hubs, potentially leading to more extensive and expensive gearbox repairs if left unresolved. Poor synchronisation can also diminish driving enjoyment and compromise the smooth operation of the transmission.
- Replacing a worn first gear synchro ring restores proper synchronisation, improves shift quality and helps protect the transmission from further internal wear. An OE Match replacement provides factory-style fitment, precision manufacturing and long-term durability, ensuring smooth and reliable gearbox performance for your Porsche.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91530230113
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 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
The OE Match Synchro Cone Ring is a replacement manual-transmission synchroniser component for the 1st and 2nd gear synchromesh assembly on selected Porsche 986 Boxster S and 996 Carrera models.
Fits:- Porsche Boxster S 986 3.2L 2000-02 (6-Speed Manual)
- Porsche Boxster S 986 3.2L 2003-04 (6-Speed Manual)
- Porsche 996 C2 3.4L 1997-08/01 (6-Speed Manual)
- Porsche 996 C4 3.4L 1997-08/01 (6-Speed Manual)
Diagram Ref No 4
Located inside the gearbox, the cone ring uses friction to help equalise the rotational speed of the selected gear and transmission shaft before the engagement components lock together.
This process is essential for smooth gear selection and helps prevent grinding, crunching and excessive shock loading during shifts.
The OE Match replacement is suitable for gearbox rebuilding or repair where the original cone ring has become worn, glazed, scored or otherwise unable to provide effective synchronisation.
What This Product Does:
When the driver changes gear, the selected gear and transmission shaft may be rotating at different speeds.
Before the gear can engage cleanly, the synchroniser assembly must bring those speeds together.
The synchro cone ring helps:
- Synchronise rotational speeds before gear engagement
- Support smooth selection of 1st and 2nd gear
- Reduce crunching and gear clash
- Reduce shock loading during gear changes
- Protect the operating sleeve and engagement teeth
- Improve gear-change precision
- Reduce the effort required to select a gear
- Maintain reliable manual transmission operation
The cone ring works as part of a complete synchroniser assembly rather than operating independently. Correct operation also depends on the condition of the synchroniser rings, guide sleeve, dog teeth, gears and selector components.
Symptoms Of Wear Or Failure:
Common symptoms of a worn 1st/2nd gear synchro cone ring can include:
A worn synchroniser system may also be associated with 2nd gear pop-out, but this symptom should not automatically be attributed to the cone ring alone. The guide sleeve, gear engagement teeth, synchroniser rings, selector mechanism and other gearbox components may also contribute.
Why Replacement Matters:
A worn cone ring cannot synchronise the selected gear quickly enough before engagement.
If the gearbox continues to be used with poor synchronisation, repeated gear clash can accelerate wear to other transmission components.
Potential secondary damage can affect:
- Gear engagement teeth
- Dog teeth
- Guide / operating sleeve
- Synchroniser rings
- Selector components
- Gear wheels
- Associated transmission parts
Replacing a worn cone ring as part of a correctly diagnosed gearbox repair helps restore smooth synchronisation and can prevent further deterioration of more expensive components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99630461320
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
OE Match-quality synchronizer ring (synchro ring) - designed for use inside the manual transmission gearbox of various Porsche 6-speed models. It is engineered to meet the original Porsche specification, providing a direct-fit, high-precision replacement part for smooth gear engagement.
Sold each.
Fits:
All 6 Speed Manual Gearbox
Porsche 986 Boxster S 2000 - 2005
Porsche 996 C2 / C4 1998 - 2005
Diagram Ref No. 3
The synchronizer ring (also called a synchro ring) helps smoothly engage gears during shifting - especially between 1st and 2nd gears - by matching the rotational speeds of the gears and shafts before the gear teeth mesh. This prevents gear grinding, reduces wear, and provides a more refined shifting feel. If a synchronizer ring becomes worn or damaged, you may experience rough shifts or difficulty selecting gears.
Function
• Speed Matching: Helps equalize speeds of the gear and shaft before engagement.
• Friction Control: Uses friction material surfaces to slow or speed parts for smooth engagement.
• Shift Quality: Promotes quieter, smoother shifting with reduced gear clash.
• Gearbox Protection: Reduces wear on gears and synchro components by facilitating correct engagement.
Synchro rings are subject to wear over time, especially under regular spirited driving or heavy use. Worn synchro rings can lead to:
• Gear grinding when shifting
• Difficult gear engagement
• Increased transmission wear Harsh or noisy shifts
Replacing a worn synchronizer ring with an OE Match part restores intended gearbox function, improves shift quality, and helps protect other internal transmission components from accelerated wear.
Replace this synchronizer ring if you experience:
• Grinding or crunching when shifting between gears
• Difficulty selecting certain gears
• Gear shifts that feel stiff or reluctant
• Noisy transmission operation during shifts
• Symptoms during gearbox rebuild or overhaul
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030461720
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) 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 996 GT2 2001-05
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MKII GT3 / GT3 RS 2010-11
Synchroniser ring is a replacement designed for Porsche manual gearbox applications, ensuring smooth and reliable gear changes. Installed within the transmission’s synchromesh hub assembly, this ring facilitates the engagement of gears by matching rotational speeds before meshing, thereby eliminating grinding and excessive wear. Built to match Porsche’s original specification.
Sold each
Fits:
Porsche 911 (993) (1995-1998) (3rd-6th gear and reverse gear)
Porsche 911 (996) GT2 (2002-2005) (3rd-6th gear)
Porsche 911 (996) GT3 (2000-2005) (3rd-4th gear)
Porsche 911 (996) Turbo / S (2001-2005) (3rd-4th gear)
Porsche 911 (997) GT3 (2010-2011) (6th gear)
Porsche 911 (997) GT3 RS (2011) (6th gear)
Porsche 911 (997) GT3 RS 4.0 (2011) (6th gear)
• Position: Inside manual transmission, synchromesh ring for one of the gear sets (often 3rd/4th gear or 5th/6th depending on the gearbox).
• Function: Enables gear engagement by synchronising shaft speeds, preventing gear-grinding, facilitating smooth shifts and protecting gear teeth and synchroniser hubs.
• Applications: Ideal when the transmission is open for rebuild, when synchroniser wear is apparent (hard or noisy shifts, grinding) or when restoring a Porsche manual gearbox to high performance.
The synchroniser ring is key to proper manual gearbox operation. Over time, wear, heat and load cause the sliding surfaces to glaze or the ring teeth to degrade, leading to symptoms such as gear clash, difficult shifts, poor gear engagement or even damage to gear teeth and hubs. Replacing the synchroniser ring ensures:
• Smooth, reliable gear engagement
• Reduced gear-grinding and longer synchroniser life
• Protection for the gearbox internals from further wear
• Enhanced driving experience and drivetrain reliability
When to replace:
• The gearbox exhibits grinding when changing into a specific gear or range (often 3rd/4th or 5th/6th)
• Hard gear changes, slipping, or noise from the transmission under load
• Internal inspection shows wear or scoring on the old synchroniser ring surfaces
• You’re rebuilding the gearbox or performing a major service where opening the transmission is already necessary.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421123
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
Fits:
Porsche 996 (6 speed) 1998 model only 6 teeth for 1st/2nd gears
Diagram Ref No. 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030461120
The product you are viewing cross references to these numbers