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Porsche 924 (1977-1988) 924 2.0L 1980-85 Gearbox / Transmission Gearbox Parts

Gearbox Gears / Crown Wheel and Pinion

Gearbox Gears / Crown Wheel and Pinion

DISPLAYING 1 to 1 (of 1 products)
1st Gear Shifting Gear. Porsche 924 / 944 1980–91 - 016311257
2
1st Gear Shifting Gear. Porsche 924 / 944 1980–91
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016311257
Product Information
Product Information
1st Gear Shifting Gear.

The Genuine Porsche 1st Gear Shifting Gear is an internal manual transmission component used in selected Porsche 924, 924 S and 944 5-speed gearboxes.

Fits:

  • Porsche 924 2.0L 1980-85
  • Porsche 924S 2.5L 1986-87
  • Porsche 924S 2.5L 1988
  • Porsche 944 2.5L 8V 1982-87
  • Porsche 944S 2.5L 16V 1987-88
  • Porsche 944 Turbo 2.5L 8V 1985-88
  • Porsche 944 Turbo 2.5L 8V 1989-91
  • Porsche 944 Turbo S 2.5L 8V 1988  

Diagram Ref No 28

Located within the transmission gearset, this component provides the gearing required for first gear. First gear delivers the highest torque multiplication in the normal forward gear range, allowing the vehicle to move away from a standstill and accelerate effectively at low road speeds.

The gear works together with the 1st/2nd synchroniser assembly, needle-roller bearing and associated transmission components. During selection of first gear, the synchroniser system matches rotational speeds before locking the gear into the driveline so engine torque can be transmitted through the gearbox.

Because first gear regularly handles high torque during vehicle pull-away, worn gear teeth, engagement teeth or associated synchroniser components can eventually lead to noise, difficult gear selection, jumping out of gear or loss of reliable drive.

What This Product Does:
The 1st gear shifting gear forms part of the transmission's internal gear train.

It is designed to:

  • Provide the transmission ratio required for first gear.
  • Transfer engine torque through the gearbox when first gear is engaged.
  • Provide strong torque multiplication when moving away from a standstill.
  • Work with the 1st/2nd synchroniser assembly.
  • Rotate on its corresponding bearing when not locked to the shaft.
  • Engage with the transmission synchroniser system during gear selection.
  • Support smooth transition into first gear when associated components are serviceable.
  • Provide reliable low-speed drive.
  • Replace a worn, chipped or damaged original first gear.
  • Restore correct gearbox operation during transmission rebuilding.

Symptoms Of Wear Or Failure:
Possible symptoms include:

  • Grinding when selecting first gear.
  • Crunching during engagement.
  • First gear becoming difficult to select.
  • Gear lever resisting movement into first.
  • Transmission jumping out of first gear.
  • First gear disengaging under acceleration.
  • Excessive gear whine in first gear.
  • Rumbling or abnormal mechanical noise when first gear is engaged.
  • Clicking or knocking from the transmission.
  • Vibration under load in first gear.
  • Poor or inconsistent engagement.
  • Vehicle temporarily losing drive in first gear.
  • Metal particles appearing in transmission oil.
  • Chipped or damaged gear teeth discovered during gearbox dismantling.
  • Worn engagement teeth.
  • Excessive play between the gear and its bearing.
  • Visible scoring, pitting or surface damage.

Many of these symptoms can also be caused by synchroniser wear, selector adjustment, bearings or internal transmission alignment, so diagnosis should consider the complete gearbox assembly.

Why Replacement Matters:
Transmission gears must transmit substantial torque while maintaining accurate tooth contact.

If first gear becomes badly worn or damaged, loads may no longer be distributed correctly across the gear teeth.

Replacing a damaged gear helps restore:

  • Reliable first-gear engagement.
  • Correct transmission of engine torque.
  • Smooth low-speed operation.
  • Consistent gearbox performance.
  • Reduced abnormal transmission noise.
  • Correct interaction with the synchroniser system.
  • Long-term gearbox reliability.

Ignoring damaged gear components can allow metal debris and abnormal loading to affect other internal parts.



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About Gearbox Gears / Crown Wheel and Pinion

Porsche Gearbox Gears, Crown Wheel & Pinion Shafts | Precision-Engineered Components for Power and Performance

Gearbox gears, crown wheels, and pinion shafts form the mechanical heart of your Porsche’s transmission and differential systems. These precision-cut components work together to transfer engine torque efficiently to the wheels, ensuring smooth gear changes, optimal traction, and refined performance.

At Design911, we supply high-quality gearbox gears, crown wheel and pinion shaft assemblies designed to meet or exceed original performance standards. Manufactured from case-hardened steel alloys and finished with precision machining, these components deliver exceptional strength, accuracy, and durability — essential for high-performance or classic Porsche applications.

Whether you’re rebuilding a manual gearbox, restoring a differential, or upgrading for motorsport use, our range ensures exact gear ratios, reduced noise, and long-lasting reliability.

What Do Gearbox Gears, Crown Wheel & Pinion Shafts Do?

These components are responsible for managing torque conversion, power delivery, and wheel rotation balance within the gearbox and differential.

Core Functions:

  • Gearbox Gears: Transmit power between shafts to control speed and torque output.
  • Crown Wheel & Pinion Shaft: Transfer torque from the gearbox to the differential, adjusting rotational direction and ratio. Maintain smooth power flow to the driven wheels. Support consistent acceleration and top-speed performance.

Together, they ensure seamless power distribution, responsive acceleration, and refined drivability across all Porsche models.

Why Do Gears, Crown Wheels & Pinion Shafts Fail or Wear Out?

Constant rotational stress, torque loads, and friction cause gradual wear and fatigue. Over time, even the strongest precision gears can lose performance if not properly maintained or lubricated.

Common Causes of Failure Include:

  • Excessive wear from low or contaminated gearbox oil.
  • Pitting, scoring, or chipped teeth from overload or poor lubrication.
  • Misalignment caused by worn bearings or damaged housings.
  • Heat distortion from aggressive driving or track use.
  • Incorrect installation or gear backlash setting errors.

When these components wear or fail, symptoms include whining or grinding noises, loss of smooth shifting, vibration, or inconsistent power delivery to the wheels.

Why Replace or Upgrade Your Porsche Gearbox Gears, Crown Wheel & Pinion Shaft?

Replacing worn or damaged gears, crown wheels, and pinion shafts restores drivetrain precision and ensures optimal torque transfer. Upgrading to performance-engineered components can also improve acceleration, gear engagement, and durability under high load.

Key Benefits:

  • Restores quiet, efficient gearbox and differential operation.
  • Eliminates whining, grinding, or gear backlash issues.
  • Improves power delivery and throttle response.
  • Reduces wear on associated bearings and shafts.
  • Designed for strength, accuracy, and long service life.
  • Available in standard and performance ratio options for Porsche models.

These components should always be replaced during gearbox or differential rebuilds to maintain correct gear alignment and long-term drivetrain reliability.

Highlights

  • Precision-cut Porsche gearbox gears, crown wheel & pinion shafts.
  • Manufactured from high-strength, case-hardened steel.
  • Balanced and finished for minimal noise and wear.
  • Suitable for Porsche 911, Cayman, Boxster, and classic models.
  • Direct-fit replacements for road, restoration, or performance builds.
  • Engineered for smooth, reliable torque transfer and control.       

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