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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 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Related, superseded, cross reference or alternative numbers for comparison.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 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Related, superseded, cross reference or alternative numbers for comparison.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-Speed transmission only, 2 slots in hub
Sold individually
Fits:
Porsche 911 1965 - 1971
Porsche 914 All 1st Gear with 5-Speed
The dog teeth ring forms part of the gearbox synchroniser assembly. It works with the synchro ring, operating sleeve, and gear hub to allow the selected gear to engage smoothly. On 1st gear, the dog teeth are critical for clean gear selection, especially during low-speed driving, manoeuvring, and gearbox operation from rest.
Functions
• Replaces the 1st gear dog teeth ring
• Helps restore correct 1st gear engagement
• Works with the synchro ring and operating sleeve
• Supports smoother gear selection
• Helps reduce crunching, baulking, or poor shift feel
• Suitable for gearbox rebuilds and synchroniser repairs
• OE Match replacement for classic Porsche transmission service.
Why Replace This Part?
Dog teeth can wear, chip, round off, or become damaged through age, high mileage, poor lubrication, worn synchro parts, or aggressive gear changes. Worn 1st gear dog teeth may cause difficult gear engagement, crunching, jumping out of gear, or poor shift quality. Replacing the dog teeth during gearbox overhaul helps restore reliable synchroniser operation and smoother 1st gear selection.
When to Replace This Part
• 1st gear is difficult to select
• Crunching or baulking occurs when engaging 1st gear
• The gearbox jumps out of 1st gear
• The dog teeth are chipped, rounded, worn, or damaged
• The synchro ring or operating sleeve is being replaced
• The gearbox is being rebuilt or inspected
• Preventative replacement is being carried out during transmission overhaul
Where it fits on the car
This dog teeth ring fits inside the gearbox on the 1st gear synchroniser assembly. It forms part of the internal gear engagement system and should be installed according to the factory gearbox layout.
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 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)
The OE Match Synchro Ring is a high-quality replacement transmission component designed for use in 3rd, 4th and 5th gear positions within Porsche manual gearboxes. Manufactured to OE specifications for fit, precision and durability, this synchroniser ring plays a critical role in ensuring smooth and accurate gear changes by matching gear and shaft speeds before engagement.
Fits:
- 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)
Diagram Ref No 10
Working in conjunction with the synchroniser hub, selector sleeve and dog teeth, the synchro ring uses friction to equalise rotational speeds between transmission components, allowing gears to engage smoothly and reducing wear on the gearbox. Three synchro rings are typically required per gearbox, one for each applicable gear position.
What This Product Does:
- Synchronises gear and shaft speeds before engagement.
- Enables smooth selection of 3rd, 4th and 5th gears.
- Reduces gear clash and grinding during shifting.
- Works with the synchroniser assembly and dog teeth.
- Improves gearbox shift quality and drivability.
- Minimises wear on transmission engagement components.
- Supports reliable and efficient manual gearbox operation.
Symptoms Of Wear Or Failure:
- Difficulty engaging 3rd, 4th or 5th gear.
- Gear grinding or crunching during gear changes.
- Increased resistance when shifting.
- Notchy, inconsistent or rough gear engagement.
- Requirement to force the gear lever into gear.
- Excessive transmission noise during shifting.
- Poor shift quality, especially at higher engine speeds.
- Accelerated wear of dog teeth, selector sleeves and related components.
Why Replacement Matters:
- Synchroniser rings are wear items that experience friction every time a gear is selected. Over time, the friction surfaces wear down, reducing their ability to equalise gear speeds before engagement. This can result in difficult gear selection, noisy shifts and increased wear throughout the transmission.
- A worn synchro ring places additional stress on dog teeth, selector sleeves and synchroniser hubs, potentially leading to more extensive gearbox damage and expensive repairs if left unattended. Reduced synchronisation can also detract from driving enjoyment and compromise the smooth operation expected from a Porsche manual transmission.
- Replacing worn synchro rings restores proper synchronisation, improves gear change quality and helps protect other internal gearbox components from premature wear. An OE Match replacement provides factory-style fitment, precision manufacturing and long-term durability, ensuring dependable transmission performance and smooth gear engagement.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91130230113
The product you are viewing cross references to these numbers
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.
