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Gearbox Syncro Ring / Brake Band / Dog Teeth
By OE Match
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
This synchroniser ring that fits into the 915 gearbox of a Porsche 911. Its role is to match the rotational speed of a gear to the shaft before the dog teeth engage, enabling grind-free shifting, especially into 2nd gear.
Fits:
Porsche 911 2nd Gear Only 1974 - 1986 (915 Trans.)
Porsche 912E 1st-2nd Gears 1972 - 1976
Diagram Ref no 39.
• Function: The synchroniser ring helps match the speed of the transmission shaft and gear before engagement, enabling smooth shifting without gear clash.
• Position: Located inside the 915 manual gearbox, specifically associated with 1st/2nd gear synchronising assembly (diagram ref no 39)
• Benefit: Restores precise gear changes, reduces shifting effort, prevents gearbox noise or damage
Over time, the synchroniser ring’s friction surfaces wear, reducing its ability to align gear speeds. This can lead to gear grinding, difficulty selecting 2nd gear, or “pop-out” under load.
When to replaces:
• During a gearbox overhaul or rebuild of a 915 transmission.
• If you experience gear grinding, hard 2nd gear shifts, or gear pop-out.
• When you’re replacing other major gearbox components - installing a new synchro ring ensures correct engagement and long transmission life.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91530230114
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 914 (1970-1976)
Fits:
Porsche 914 All 1st-5th Gears
Porsche 911 1969-86 3rd, 4th, 5th (915 Trans.)
Porsche 912 >>1971
Diagram ref no 10.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91130230113
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
| Synchro Gear Teeth 911 1987-94 3rd-5th Gears |
Fits:
Porsche 911 / 964 / 965 (87-94) - G50 - 3rd - 5th Gear
Manual transmission
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830420910
The product you are viewing cross references to these numbers
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 Turbo 1975-88 4 speed
Diagram Ref no 41.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030230100
The product you are viewing cross references to these numbers
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- 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
Price is for one syncro ring.
Fits:
For cars with 5-Speed Manual Transmission
Porsche 911 Carrera G50 1987-89
Porsche 964 Carrera 2 G50 1989-94
Porsche 964 Carrera 4 G64 1989-94
Porsche 964 Turbo 3.3L G50 1991-92
Porsche 964 Turbo 3.6L G50 1993-94
Diagram Ref no 32
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030431102
The product you are viewing cross references to these numbers
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 Turbo 1975-88 4 speed
Diagram ref no 12.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030230300
The product you are viewing cross references to these numbers
- Porsche 911 1987-1989 3.2L G50
Fits:
Porsche 911 5 Speed G50 gearbox 1987-89
Diagram Ref no 7.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421105
The product you are viewing cross references to these numbers
- Porsche 911 1975-1977 3.0L Turbo (930)
2 per gearbox
Fits:
Porsche 911 Turbo 1975-77
Click 'Zoom in' to see the diagram.
Diagram ref no 45
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030241100
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L

Fits:
Porsche 911 1974-86 (915 Gearbox)
Click "Zoom in" to see the diagram.
Diagram Ref no 13.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91130241128
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
G915 up to 1975 1st gear / G915 1976>> 2nd. gear
Fits:
Porsche 911 1974-86 (915 Gearbox)
| Dog
Teeth 2nd Gear 911 1972-86 Symmetrical Tooth Point, 1 slot in hub (915 Trans. 1972-86) |
A dog-teeth gear (or synchronizer-gear hub / 1st-2nd gear dog gear) used inside the 915 gearbox. This gear section engages with corresponding hub or clutch-dog components to allow shifting between gears - in particular 1st and/or 2nd gear depending on the configuration.
Gears inside classic 915 transmissions - especially dog / synchronizer-gears - are subject to wear over time: tooth heads can round off, suffer chip-out, or distort under load; synchronizer engagement surfaces may wear and lose precision. This can cause:
• Gear-slip or missed shifts
• Grinding or clash during shifting
• Torque transmission loss or vibration under load
• Accelerated wear of other transmission internals.
Replacing worn gears with a precisely machined, correctly hardened OE-match replacement restores gear-mesh integrity, retains gearbox performance, and helps avoid costly gearbox failure.
When to Replace.
Consider fitting this gear if:
• You hear grinding, clash, or crunching during shifting - especially into 1st or 2nd gear
• Gearbox inspection reveals worn, rounded, chipped, or damaged dog-teeth or synchronizer surfaces
• You are performing a full gearbox rebuild or overhaul
• The gearbox has high mileage or signs of internal wear
• You want to restore factory-spec shifting performance and reliability
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91530224200
The product you are viewing cross references to these numbers
-
gears and shafts 4. speed transmission - G 930/34 - 911 1978-83 303-05
-
gears and shafts 5. speed transmission - G 915 - 911 1978-83 303-15
-
gears and shafts 4-speed gear wheel sets see group 3/03/00 303-05
-
gears and shafts 5-speed gear wheel sets see group 3/03/10 303-15
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Gear wheel sets 5-speed transmission for 911 1972 ONWARDS 303-10
-
Gears and shafts 4-speed transmission for 911 E/S UPTO 1970 and 911 T UPTO 1971 303-25
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Gear wheel sets 4-speed transmission for 1972 ONWARDS 303-30
-
gears and shafts SPM - G 925/16 - 911 1978-83 309-05
-
gears and shafts 4-speed 911 1984-86 303-05
-
gears and shafts 5-speed 911 1984-86 303-15
-
Gear wheel sets 4-speed 911 1974-77 303-00
-
Gears and shafts 4-speed - Model 915 - 911 1974-77 303-05
-
Gear wheel sets 5-speed 911 1974-77 303-10
-
Gears and shafts 5 speed - Models: TYP 915 / TYP 923 - 911 1974-77 303-15
-
Gears and shafts 911 1974-77 SPM 309-05
-
gears and shafts 5-speed transmission for 911 UPTO 1971 303-05
-
Gears and shafts 5-speed transmission (gear wheel sets 915.300/02) for 911 1972 onwards 303-15
-
gears and shafts 4-speed transmission for 911 1972 ONWARDS 303-35
-
gears and shafts sportomatic for 911 1972 ONWARDS 308-15
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gears and shafts 5-speed transmission 911 1965-69 303-05
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gears and shafts 4-speed transmission 911 1965-69 303-15
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gears and shafts sportomatic 911 1965-69 308-05
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gear wheel sets 911 TURBO 1975-77 303-05
-
gears and shafts 308-05
OEMatch Gearbox Syncro Ring / Brake Band / Dog Teeth — Engagement, Smoothness, Control
OEMatch gearbox synchroniser parts are practical replacements designed for Porsche models. Synchro rings, brake bands and dog teeth restore accurate gear engagement during a rebuild or repair, reduce grinding and improve shift clarity. These items are chosen for compatibility with model-specific transmission layouts and common Porsche gearbox applications.
Available Types
- Synchro rings for specific gearsets and ratios
- Brake bands sized for particular Porsche manual transmissions
- Dog rings and dog teeth for hub engagement and selector assemblies
Understanding OEMatch Gearbox Syncro Ring / Brake Band / Dog Teeth
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original gearbox synchroniser parts.
OE (Original Equipment) refers to parts matching original specifications for the gearbox synchroniser parts and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM gearbox synchroniser parts engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Synchroniser rings, brake bands and dog teeth coordinate rotational speed and positive engagement between gears; correct selection and installation support consistent shift feel and reduce the risk of incidental damage during use or rebuild. Material choice and heat treatment affect wear rates and contact behaviour, so matching part type to the transmission model is important.
Benefits Include
- Restores synchronisation to reduce gear noise and grinding
- Protects adjacent gearbox components by ensuring controlled engagement
- Helps maintain consistent shift effort across gears and driving conditions
Why Gearbox Syncro Ring / Brake Band / Dog Teeth Wear and Fail
- Friction surface wear from age, contamination or degraded lubricant
- Deformation or chipping of dog teeth due to aggressive shifting or impact
- Heat stress and inadequate lubrication during high-load operation
The Importance of Replacing with OEMatch Gearbox Syncro Ring / Brake Band / Dog Teeth
Replacing worn synchroniser components as part of a transmission rebuild or service reduces the likelihood of further gearbox damage and helps retain intended shift characteristics. Using parts matched to the Porsche transmission maintains mechanical clearances and engagement timing, supporting dependable operation and reducing the chance of secondary failure.
Advantages
- Replacements sized for common Porsche transmission types to aid fitment
- Heat-treated and machined materials for consistent contact behaviour
- Suitable for restorations, routine servicing and compatible performance upgrades
Support & Advice
Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified. If you are unsure about setup, condition or backlash settings, consult a specialist with Porsche experience.