needle bearing Genuine Porsche part 016311213H

Synchro Ring 2nd Gear.
Fits:
Porsche 924 1980-85 Manual Transmission: VQ VR UV MD ME MF MB MX
Porsche 944 1982-85 Manual Transmission
Click 'Zoom in' to see the diagram.
Diagram Ref no 22

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Syncro Ring 3rd/4th Gear. Price is for each Syncro Ring. Needs 2 per gearbox.
Fits:
Porsche 924S 1986-88 Manual Transmission
Porsche 944 1986-88 Manual Transmission: 5Y 5S 5Z 7V 5P 5R UY 9U AGP AGR AOR
Porsche 944 1988-91 Manual Transmission: ASG ASH AOR AOS AOT ASV ASW
Click 'Zoom in' to see the diagram.
Diagram Ref no 8

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Synchro Ring 3rd/4th Gear
High-quality OE Match Syncro Ring designed to replace the original 3rd/4th gear synchronizer ring in manual gearboxes used on Porsche 924S (1986–1988) and Porsche 944 (1986–1991). It enables smooth gear matching between 3rd and 4th gears during shifting, helping eliminate gear clash and improve shift quality.
Sold individually, Needs 2 per gearbox.
Fits:
Porsche 924S 1986 - 1988 Manual Transmission
Porsche 944 1986 - 1988 Manual Transmission: 5Y 5S 5Z 7V 5P 5R UY 9U AGP AGR AOR
Porsche 944 1988 - 1991 Manual Transmission: ASG ASH AOR AOS AOT ASV ASW
Diagram Ref no 8
This OE Match ring is ideal for transmission rebuilds, synchro refresh jobs, or when shifting issues are evident in the affected gears. It installs directly in place of the original ring within the transmission’s 3rd/4th synchronizer hub assembly.
The syncro ring helps match the speed of the gear to the speed of the shaft before engagement, allowing shifts into 3rd and 4th gear to occur smoothly and quietly. It bridges the difference between gears, reducing wear on dog teeth, gears, and engagement components.
Function
•  Provides friction interface for speed matching between 3rd and 4th gears
•  Reduces gear clash and harsh engagement
•  Restores smooth shifting performance
Synchro rings wear naturally as part of normal transmission use. When they degrade, you may experience gear crunching, difficult or noisy shifts, gear hop, or faster wear on other transmission parts. Replacing them with an OE Match synchro ring restores correct shift feel, prolongs gearbox life, and helps maintain the performance and drivability expected from Porsche’s enthusiast-oriented engines.
When to replace:
•  Grinding or crunching when selecting 3rd or 4th gear
•  Delayed or hesitant engagement of those gears
•  Transmission noise during gear changes
•  During a full gearbox rebuild or synchro refresh
•  Routine clutch or transmission service with high mileage

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Syncro Ring 2nd Gear
This Syncro Ring is a premium OE Match transmission component engineered to replicate the original Porsche synchronizer ring used on 2nd gear in the manual transmissions of early Porsche 924 (1980–1985) and Porsche 944 (1982–1985). It helps ensure smooth, accurate gear engagement by matching gear speeds before clutch engagement.
Fits:
Porsche 924 1980 - 1985 Manual Transmission: VQ VR UV MD ME MF MB MX
Porsche 944 1982 - 1985 Manual Transmission
Diagram Ref no 22
This OE Match syncro ring is ideal for transmission rebuilds, synchro refresh jobs, or whenever shift quality degrades. It installs directly into the synchronizer hub assembly for 2nd gear, restoring correct friction and gear-speed matching as designed by Porsche.
The 2nd gear syncro ring provides a friction interface that allows the gear’s speed to match the shaft’s speed before engagement, facilitating a smooth and quiet shift into 2nd gear without wear-inducing grinding or clashing.
Function
• Provides friction contact for speed matching of 2nd gear
•  Reduces gear clash and abrasive engagement
•  Helps restore smooth and positive shifting
Synchro rings wear with use, and as friction surfaces degrade, shifting into the affected gear becomes more difficult, noisy, or harsh. This can accelerate wear on gear teeth and other transmission components. Replacing the worn synchronizer with an OE Match synchronizer ring restores friction characteristics, improves shift quality, and extends the life of the gearbox.
When to replace:
•  Grinding or crunching when shifting into 2nd gear
•  Delayed or hesitant engagement
•  Transmission noise during gear changes
•  During manual gearbox rebuilds or overhauls
•  After high-mileage or performance use

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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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