OE Match

Clutch slave cylinder. Porsche 911 1987-89 / 964 / 993 G50/50 Gearbox

Fits:
Porsche 911 1987-89 with G50/50 Gearbox

Porsche 930 Turbo 3.3L 08/1988-07/1989
Porsche 964 1990-94 with G50/50 Gearbox
Porsche 993 1994-97 with G50/50 Gearbox

A clutch that is engaged/disengaged via hydraulic fluid instead of a cable uses a Clutch Master and Clutch Slave Cylinder. When depressing the clutch pedal a lever is squeezed, forcing hydraulic fluid through hydraulic lines to a "slave cylinder" which houses a piston. The piston forces a push rod to engage or disengage the clutch. A clutch master cylinder that contains the hydraulic fluid sits on a support har near the clutch lever. When either the Master or Slave Cylinder fail the clutch is unable to be disengaged.

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95011623712

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Synchro shifting sleeve 1st/2nd gear. 

Fits:
Porsche 911 1974-86 (915 Gearbox)

Diagram Ref no 42.

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93030241103

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Synchro anchor block 2nd gear.



Fits:
Porsche 911 1974-86 (915 Gearbox)

Click 'Zoom in' to see the diagram.
Diagram ref no 38.

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92830232200

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Synchro Thrust Block 1st/2nd Gear.
Supports the synchroniser and gear assembly within the gearbox, particularly relating to first and second gear. It is manufactured as a direct-fit component designed to replicate the form, fit, and function of the factory part.
Sold each, 2 required per gearbox

Fits:
Porsche 911 1974 - 1986 (915 Gearbox)

Diagram ref no 44.

Inside the 915 manual gearbox, the thrust block plays a critical role in maintaining correct alignment and support for the synchroniser assembly, particularly between first and second gears. It helps maintain correct spacing and load distribution on internal transmission components, ensuring consistent gear engagement and smooth shifts.

By accurately positioning and supporting the gears and synchronisers, this thrust block helps reduce internal wear and supports reliable transmission operation - especially under spirited driving conditions common in performance Porsche use.

Transmission internals operate under high rotational and axial loads, meaning even small variations in spacing or fit can lead to friction, wear, or mis-engagement. A worn or poorly fitting thrust block can cause:
• Gear engagement issues
• Increased synchroniser or gear wear
• Rough or imprecise shifting
• Premature transmission component failure.

Replace this transmission thrust block if you are:
• Performing a full gearbox rebuild
• Noticing rough or imprecise shifting in first/second gear
• Reassembling a gearbox with worn internal components
• Addressing synchroniser wear or axial play

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91530231502

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Synchro Brake Band 3rd / 4th / 5th gear.
3 per gearbox. *please note these are 1/2 pieces so order 2 pcs to make one complete brake band.

Fits:
Porsche 911 1974-86 (915 Gearbox)

Diagram Ref no 8.

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91130231608

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Synchro brake band 2nd gear.

Fits:
Porsche 911 1974-86 (915 Gearbox)

Diagram ref no 39

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92830231801

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Synchro Brake Band 1st Gear.
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.

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92830231908

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Synchro ring 3rd / 4th / 5th Gear. (3 per gearbox)

Fits:
Porsche 914 All 1st-5th Gears
Porsche 911 1969-86 3rd, 4th, 5th (915 Trans.)
Porsche 912 >>1971 

Diagram ref no 10.

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91130230113

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Synchro ring 2nd gear, for 915 Gearbox.
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.

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91530230114

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Synchro ring 1st gear.
Sold each.

Fits:
Porsche 911 1974-86 (915 Gearbox)

Diagram Ref no 39.

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91530230113

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Dog Teeth 3rd/4th/5th Gear. (3 per gearbox)
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.

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90130224203

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Transmission gearbox teeth. Dog teeth 2nd gear. 
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)

Diagram Ref no 35.

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

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91530224200

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Dog teeth 1st gear. For cars with 915 Gearbox.

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.

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91530224114

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New wishbone front.




Porsche 993 1994-97 (not RS)

This product supersedes Porsche's old part numbers:
- 99334101700 (LEFT) / 99334101800 (RIGHT)
- 99334101701 (LEFT) / 99334101801 (RIGHT)

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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99334101

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Wishbone front (A-Frame).



Fits:
Porsche 911 1974-89
Porsche 930 Turbo

Click "Zoom in" to see the diagram.
Diagram Ref No 14.

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91134190

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Front lower control arm (wishbone/A-frame) is a direct-fit replacement for the original Porsche component. Engineered for exact fit, durable finish and correct geometry on 1969-73 911 and 1970-76 914-6 models.

Fits:
Porsche 911 1969 - 1973
Porsche 914-6 1970 - 1976

Diagram ref no 12.

Position: Front axle, lower control arm (A-frame) that connects the upright or suspension hub to the chassis.

This wishbone is a critical structural suspension component that maintains correct front wheel alignment, controls camber and caster under load, and anchors the suspension geometry to the chassis. It absorbs lateral, torsional and vertical loads, ensuring your vehicle handles with precision.

Front control arms can suffer from fatigue, corrosion, wear at the mounting bushings, or damage from impact or road debris. When compromised, you may notice uneven tyre wear, loose steering feel, vibration or mis-alignment. A new arm restores correct geometry, return-to-centre feel, and stable road handling.

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