Gearbox Syncro Ring / Brake Band / Dog Teeth

G50 Transmission synchroniser ring for 1st – 2nd gear.

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

Check fitment for your specific vehicle (model, year, engine) before ordering. Confirm the gearbox identification as well as the vehicle details; the model listing alone does not identify every transmission version.

What This Product Does

The engagement teeth form part of the manual gearbox synchroniser assembly. They work with the associated selection components to engage the chosen gear. This component should not be confused with a complete synchroniser assembly or a friction ring alone.

Functions

• Provides engagement teeth for first and second gear selection.
• Works alongside the gearbox synchroniser and selector components.
• Replaces worn teeth during an internal transmission repair.
  
  

Technical Details

• Supplied reference: 92830421010.
• Brand: OE Match.
• Application: first and second gear, manual transmission.
• Supplied transmission identification: G50
  
  

Symptoms of Fault

• Crunching or grinding as the affected gear is selected.
• Resistance or hesitation before engagement.
• Gear clash during downshifts.
• Visible wear or damage found during gearbox dismantling.
  
  

These symptoms are not conclusive evidence of damaged teeth. Clutch operation, linkage condition, lubricant and other internal components can produce similar complaints.

Why Replacement Matters

Replacing damaged engagement teeth addresses an identified source of selection trouble during a gearbox rebuild. Inspect the mating components at the same time, rather than assuming that replacing one item will resolve every shifting fault. OE Match focuses on Porsche replacement applications, with specification reviews and sample assessment forming part of its development process.

FAQs

Can fresh gearbox oil repair worn teeth?
No. Correct lubricant may affect shift feel, but it cannot restore damaged engagement surfaces.

Does difficult selection always mean internal gearbox wear?
No. Check clutch release, linkage adjustment and mounts before deciding which internal parts need attention.

What else should be inspected during repair?
Assess the related synchroniser components, selectors, bearings and seals, replacing other items according to their condition and the gearbox repair procedure.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

92830421010

The product you are viewing cross references to these numbers

Synchro Hub With Locking Collar, Manual Transmission 5-Speed, Gears 1/2.
5-Speed Manual Transmission ONLY! 
Pressure Springs, Balls And Thrust Piece Included.

Fits:
Porsche 911 1987>>1989
Porsche 959 1987>>1988
Porsche 964 Carrera 2/4 1989>>1994

Diagram Ref No 33 (Diagram Ref No 11, 34 And 35 Included)

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95030403131

The product you are viewing cross references to these numbers

OE Match synchroniser gear teeth for 3rd–5th gear applications in Porsche 911, 964 and 965 G50 manual gearboxes. Intended for repairs involving worn synchroniser components.

Fits

• Porsche 911 / 964 / 965 (87-94) - G50 - 3rd - 5th Gear
• Synchro Gear Teeth 911 1987-94 3rd-5th Gears
• 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
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 911 1987-1989 3.2L G50

What This Product Does
This component forms part of the gearbox synchroniser assembly used during selection of third, fourth and fifth gears. Synchroniser components work together to bring rotational speeds into alignment before the selected gear engages.

Functions

• Supports synchroniser operation during gear selection.
• Works with adjoining components to manage engagement of the selected gear.
• Provides a replacement component for a manual gearbox repair or rebuild.

Technical Details

• Supplied reference: 92830420910.
• Brand: OE Match.
• Transmission application: G50 manual.
• Gear positions: third, fourth and fifth.
• Component identification: synchroniser ring / synchro gear teeth.

Symptoms of Fault

• Crunching or grinding while selecting an affected gear.
• Resistance or a noticeable pause before engagement.
• Gear clash during downchanges.
• Notchy selection that requires further diagnosis.

Why Replacement Matters
Renewal is appropriate when inspection confirms synchroniser wear or damage. Worn adjoining parts should also be assessed during dismantling rather than assuming that one replacement will resolve every shifting fault. OE Match focuses on Porsche replacement applications, with specification and fitment checks forming part of its component selection process.

FAQs

Does difficult selection always indicate synchroniser wear?
No. Clutch operation, selector linkage, mounts and lubricant condition can produce similar symptoms, so diagnosis should precede dismantling.

Can fresh gearbox oil repair worn teeth?
A suitable lubricant may influence shift feel, but it cannot reverse mechanical wear or repair damaged teeth. Use the specification required for the gearbox.

What should be checked during the repair?
Inspect the associated synchroniser parts, engagement components and selector mechanism, together with seals and other accessible wear items.

Is double-declutching a repair?
It may reduce symptoms in some circumstances, but it does not correct worn internal components.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

92830420910

The product you are viewing cross references to these numbers

1st & 2nd Gear Synchro Ring 
Sold each - 2 required per car

Restore precise gear selection and smooth shifting with this OE Match 1st & 2nd Gear Synchro Ring. Manufactured to replicate the original factory specification, this direct replacement on G50 manual transmissions, helping to restore crisp gear engagement and prolong gearbox life.

Fits:

• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1 1989 3.3L Turbo (930) 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  

Diagram Ref no 32

Whether you're carrying out a complete transmission rebuild or replacing worn synchroniser components, this OE Match synchro ring delivers the fit, function and reliability expected from an original-style replacement.

What Does the Synchro Ring Do?

The synchro ring is one of the most important wear components inside the manual gearbox.

Its primary functions include:

• Matching the rotational speed of the selected gear and the gearbox shaft before engagement.
• Allowing smooth gear changes without gear clash.
• Reducing wear on gear teeth and engagement hubs.
• Improving shift quality and driver confidence.
• Helping protect internal gearbox components from excessive wear.

A correctly functioning synchro ring is essential for the smooth, precise shift quality that Porsche G50 gearboxes are known for.

Why Do Synchro Rings Fail?

Synchroniser rings are designed as wear components and gradually lose effectiveness through normal operation.

Common causes of failure include:

• Normal wear from repeated gear changes.
• Aggressive or high-performance driving.
• High mileage. Poor lubrication or degraded gearbox oil.
• Excessive heat generated within the transmission.
• Incorrect shifting techniques causing premature wear.

As the friction surface wears, the synchroniser can no longer effectively match gear speeds, resulting in increasingly difficult gear engagement.

When Should They Be Replaced?

Replacement is recommended when:

• First or second gear becomes difficult to engage.
• Gear changes produce grinding or crunching noises.
• The gearbox jumps out of gear under load.
• Shift quality deteriorates, particularly when cold.
• Carrying out a complete gearbox overhaul.
• Replacing worn synchroniser hubs, sleeves or bearings.
• Rebuilding a high-mileage or performance transmission.

As gearbox disassembly is required, replacing synchro rings alongside other wear components is considered best practice during a transmission rebuild.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95030431102

The product you are viewing cross references to these numbers

Synchro Ring – G50 5-Speed Gearbox

Restore the precise gear changes your Porsche was engineered to deliver with this OE Match Synchro Ring for the Porsche 911 G50 5-speed manual gearbox (1987-1989). Manufactured to replicate the original factory specification, this is precision engineered to provide smooth, accurate synchronisation between gears, helping eliminate gear clash and restore crisp shifting performance.

Designed for use during gearbox rebuilds or transmission repairs, this OE Match synchroniser ring is manufactured from high-quality materials to ensure consistent friction characteristics, long service life and reliable operation. Whether you're restoring a road car or rebuilding a performance transmission, this component helps return your G50 gearbox to factory-level performance.

What Does a Synchro Ring Do?

The synchro ring (synchroniser ring) is one of the most important wear components inside a manual gearbox.

Its primary functions include:
Synchronising the rotational speed of the selected gear and gearbox shaft before engagement.

• Allowing smooth gear changes without grinding.
• Reducing wear on the gear teeth, hubs and selector sleeves.
• Improving shift quality and driver confidence.
• Helping protect expensive gearbox components from premature wear.
• Delivering the precise gear engagement expected from the Porsche G50 transmission.

Without a correctly functioning synchro ring, gears cannot engage smoothly, resulting in poor shift quality and increased gearbox wear.

Why Do Synchro Rings Wear Out?

Synchroniser rings are designed as sacrificial wear components and naturally deteriorate over time.

Common causes of wear include:

• High mileage.
• Frequent gear changes during normal driving.
• Aggressive or high-performance driving.
• Poor shifting technique.
• Contaminated or degraded gearbox oil.
• Excessive transmission temperatures.
• Wear to associated synchroniser hubs and selector sleeves.

As the friction material wears, the synchroniser becomes less effective at matching gear speeds, making gear engagement progressively more difficult.

When Should the Synchro Ring Be Replaced?

Replacement is recommended when:

• Gear changes become difficult or notchy.
• Gears grind or crunch during selection.
• The gearbox is stripped for overhaul.
• The synchroniser ring shows visible wear or damage.
• Replacing selector hubs, sleeves or bearings.
• Restoring a high-mileage G50 gearbox.
• Building a performance or competition transmission.

As gearbox disassembly is required, it is considered best practice to replace all worn synchroniser components during a rebuild.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

92830421105

The product you are viewing cross references to these numbers

Thrust Piece For Synchro Hub, 5 Speed Manual Transmission.
For Cars WITH 5-Speed Manual Transmission ONLY!
Sold Each.
x3 Required Per Car.

Fits:
Porsche 911 1987>>1989
Porsche 959 1987>>1988
Porsche 964 Carrera 2/4 1989>>1994

Diagram Ref No 35

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95030435101

The product you are viewing cross references to these numbers