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Clutch Ring Gear
By OE Match
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) RS 1994-97
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
Flywheel Ring Gear – Hardened Steel (OEM 964.114.143.31). This precision-machined hardened steel ring gear features starter-pinion teeth pressed onto the outer edge of a single-mass “RS” or lightweight flywheel. It’s the critical interface between the starter motor and the engine — the starter’s small pinion engages these teeth to crank the engine during start-up.
Technical Summary
- Function: Transfers starter motor rotation to the flywheel for engine cranking.
- Location: Pressed or shrink-fitted onto the outer diameter of the flywheel.
- Construction: Heat-treated, hardened steel with precision-machined teeth for maximum strength and wear resistance.
- OEM Part Number: 964.114.143.31 (also listed as 96411414331).
- Applications: Designed for RS, single-mass, or lightweight flywheels used in various Porsche 964 and 993 models, and select 996/997 GT3 and GT2 variants. Not compatible with dual-mass flywheels.
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) RS 1994-97
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 2007-09
Why You Should Replace Your Ring Gear
1. Damaged or Missing Teeth
Grinding, rough engagement, or failed starts often result from chipped, flattened, or missing teeth on the ring gear. When the teeth are damaged, the starter pinion can’t engage properly, leading to grinding or slipping during start-up.
2. Wear, Pitting, or Corrosion
Over time, surface wear, rust, or pitting can develop due to age or moisture exposure. These issues reduce engagement quality and increase wear on both the starter and ring gear.
3. Loose or Shifted Ring Gear
Although ring gears are press-fitted, heat cycles or improper installation can cause them to loosen or shift. A loose ring gear creates noise, accelerates wear, and poses a potential safety hazard.
4. During Flywheel or Clutch Service
Whenever the flywheel is removed for clutch replacement or resurfacing, it’s best practice to inspect the ring gear closely. Replace it if you find any damage or wear—it’s far cheaper than removing the transmission again later.
5. Starter or Pinion Replacement or Upgrades
If you’re installing a new or upgraded starter—or have had a starter failure that damaged the pinion—inspect and replace the ring gear at the same time to ensure proper engagement and reliable operation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96411414331
The product you are viewing cross references to these numbers
OEMatch Clutch Ring Gear — Engagement, Smoothness, Control
OEMatch Clutch Ring Gear for Porsche models. The clutch ring gear is the toothed outer rim fitted to the flywheel; it provides the interface for the starter motor and helps preserve rotational balance during cranking. Replacing a worn ring gear restores consistent engagement and reduces the likelihood of starter or flywheel damage. OEMatch supplies parts intended for Porsche maintenance and restoration.
Understanding OEMatch Clutch Ring GearOEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original clutch ring gear.
OE (Original Equipment) refers to parts matching original specifications for the clutch ring gear and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM clutch ring gear engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
The clutch ring gear forms part of the flywheel assembly and must present a correct tooth profile, concentric mounting and suitable balance; faults in any of these areas can impede starter engagement or cause vibration. Inspection during clutch or flywheel work commonly reveals wear, heat marks or tooth damage that indicate replacement is required.
- Restores reliable starter engagement and reduces grinding
- Protects the starter motor and flywheel from further damage
- Maintains flywheel balance to limit vibration and associated wear
- Worn or chipped teeth from repeated starter engagement
- Misalignment between the starter pinion and the ring gear
- Heat distortion, corrosion or material fatigue leading to cracking or loss of tooth profile
Replacing a damaged or worn ring gear during clutch or flywheel service reduces the risk of starter failure and avoids additional repair work; using a correctly sized and heat-treated replacement preserves balance and starting reliability. OEMatch Clutch Ring Gear components are compatible replacements engineered to original-spec dimensions and tolerances — a practical option when genuine or OEM parts are unavailable.
Advantages- Heat-treated steel construction for improved wear resistance
- Machined tooth profile for smooth starter engagement
- Coverage for a range of Porsche models and service needs
Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new bolts where specified;. If you are unsure of the correct procedure, seek professional fitting.
