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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 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 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 914 (1970-1976)
Sold each.

Fits:
Porsche 911 1965-71 (1. - 5th gear)
Porsche 911 1972-86 (3. - 5th gear)
Porsche 914 1970-76 (1. - 5th gear)
Porsche 924 1976-85 (4. - 5th gear)
Click 'Zoom in' for large parts diagram.
Diagram ref no 11
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91130231101
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Fits:
Porsche 911 2.4 / 2.7 1972 - 1976
for 915-gearbox symmetric
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91530224100
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 914 (1970-1976)
Dog teeth 1st gear. Porsche 911 & 912 1965-71, 1st Gear with 4-Speed 2 slots in hub
Fits:Porsche 911 1965-71
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90230224104
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 914 (1970-1976)
| Dog Teeth 911,912 1965-71, 914 All 1st Gear with 5-Spd. Trans. Only, 2 slots in hub |
Fits:
Porsche 911 1965-71
Porsche 914 All 1st Gear with 5-Spd
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90130224106
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
| Dog Teeth 1st Gear 911 1977-86 Asymmetrical Tooth Point, 1 slot in hub (915 Trans. 1977-86) |
Fits:
Porsche 911 1974-86 (915 Gearbox)
Diagram Ref no 43.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91530224114
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 Turbo 1975-76 4 speed
Click "Zoom in" to see the diagram.
Diagram Ref no 48.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030224103
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 Turbo 1977-88 4 speed
Click "Zoom in" to see the diagram.
Diagram Ref no 48.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030224102
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
Click "Zoom in" to see the diagram.
Diagram Ref no 35.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030224200
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
G901 2rd to 5th Gear,
G915 3rd to 5th Gear
Manual transmission gear teeth are precision-engineered ridges on the gears inside a manual gearbox. These teeth interlock to transfer power from the engine to the driveshaft. Their exact shape and alignment ensure smooth gear engagement, efficient torque delivery, and dependable performance across all gear ratios. Keeping the gear teeth strong and undamaged is crucial for preventing slippage, maintaining power, and extending the overall life of the transmission.
Fits:Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera (915 Gearbox)
Porsche 911 1978-1983 3.0L / SC (915 Gearbox)
Porsche 911 1984-1986 3.2L (915 Gearbox)
Signs of Manual Transmission Gear Teeth Failure
- Grinding or whining noises during shifting, often caused by worn or damaged teeth.
- Difficulty engaging gears due to misaligned or broken gear teeth.
- Loss of power or gear slippage when the teeth can no longer mesh correctly.
Diagram Ref no 6, 15, 23.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90130224203
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 32 & 34.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93030224300
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

Fits:
Porsche 911 1972-77 915 Manual Transmission
not for 915/60/61 gearboxes
Click 'Zoom in' for large parts diagram.
Diagram ref no 42
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91530241100
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
Manual transmission Synchro / Brake Band (Synchroniser band) engineered to match Porsche’s original specifications. Provides friction control during gear synchronisation, allowing smooth and quiet gear changes.
Fits:
Porsche 911 1974 - 1986 (915 Gearbox)
Diagram ref no 37
The synchro / brake band is part of the gearbox synchroniser system, helping to slow or control rotation of a gear or hub during shift transitions, promoting smooth engagement and preventing clash. It works in concert with the synchroniser rings, hubs, sleeves, and gearsets to align speeds of rotating parts before lock-in. Proper material, friction surface, and design are critical — the band must provide the correct friction characteristics without binding or excessive wear.
• Installation: Direct OE replacement — recommended during gearbox overhaul
• Position / Location: This part is located inside the manual transmission, within the synchroniser assembly — the mechanism that equalizes gear and shaft speeds for smooth engagement. It wraps around the synchroniser hub and works with the synchro ring and dog teeth gear to provide friction and control during shifting.
• Benefits: Restores synchroniser performance, eliminates grinding, reduces wear on gears and rings
Why replacement matters:
• With use, the original band’s friction surfaces can glaze, wear, or lose consistency, impairing its ability to slow or stabilise gear/hub motion during shifting.
• A worn or ineffective brake / synchro band can result in grinding gears, missed shifts, or gear clash, especially under load or during aggressive shifting.
• Installing a high-quality replacement restores proper friction behaviour, enabling smooth engagement, reducing wear on adjacent synchroniser elements, and extending transmission life.
• Because the transmission internals are sensitive to mismatches or degraded components, having a reliable replacement band ensures system integrity and maintains the “feel” of the gearbox.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830231908
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)
Diagram ref no 39
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830231801
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
This OE Match synchro brake band is a replacement transmission synchroniser component used on Porsche 911 models fitted with the 915 gearbox. It is designed for the 3rd, 4th, and 5th gear synchroniser assembly and matches the original-style fit and function.
3 per gearbox. *please note: these are 1/2 pieces so order 2 pcs to make one complete brake band
Fits:
Porsche 911 1974 - 1986 (915 Gearbox)
Diagram ref no 8.
This brake band fits inside the 915 manual gearbox, within the synchroniser assembly for 3rd, 4th, and 5th gear. It is an internal transmission component and is accessed during gearbox disassembly or synchroniser service.
The synchro brake band works as part of the gearbox synchroniser system. During gear changes, it helps control and equalise the speed of the gear and synchroniser hub before engagement. This allows the gear to engage more smoothly and helps reduce grinding, baulking, or difficult shifting.
Functions
• Supports smooth gear engagement in the 915 gearbox
• Helps synchronise gear speed during shifting
• Reduces gear clash, grinding, and shift resistance
• Works with the synchro ring, anchor block, energiser block, and operating sleeve
• Helps restore correct shift quality in worn gearbox assemblies
• Provides an OE Match replacement for the original brake band
• Suitable for gearbox rebuilds and synchroniser repairs
Why Replace This Part?
The synchro brake band is subject to wear every time the gearbox is shifted. Over time, it can become worn, distorted, cracked, or weakened, which may lead to poor synchroniser performance. A worn brake band can contribute to grinding gears, difficult engagement, or a notchy shift feel, especially in higher gears. Replacing it during gearbox service helps restore smoother gear changes and supports long-term transmission reliability.
When to Replace:
• The gearbox is grinding when selecting 3rd, 4th, or 5th gear
• Gear changes feel notchy, stiff, or difficult
• The transmission baulks or resists engagement
• The 915 gearbox is being rebuilt or inspected
• The synchroniser ring or operating sleeve is being replaced
• The brake band is worn, cracked, bent, or damaged
• There is excessive wear in the synchroniser assembly
• As preventative replacement during a full gearbox overhaul
Related reference numbers
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91130231608
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
This OE Match synchroniser ring is a direct-fit replacement for the 1st/2nd gear synchro teeth in Porsche G50 (or G-series) manual transmissions. It is built to the correct dimensions, materials, and tolerances for reliable gear engagement and longevity.
Fits:
Porsche 911 / 964 / 965 (1987 - 1994) - G50 - 1st - 2nd Gear
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421010
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
Sold each.
Fits:
Porsche 911 1974-86 (915 Gearbox)
Diagram Ref no 39.
Related reference numbers
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91530230113
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
-
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
-
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
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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
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Gears and shafts 5 speed - Models: TYP 915 / TYP 923 - 911 1974-77 303-15
-
Gears and shafts 911 1974-77 SPM 309-05
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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
-
gears and shafts sportomatic 911 1965-69 308-05
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gear wheel sets 911 TURBO 1975-77 303-05
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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.