Driveshaft Flange Short for Manual Gearbox. Porsche 991.2 GT3 / 992 GT3 › 9P1311112

Finally, conversion axle flanges for early 911s and 914s. These are machined in house from 4340 billet steel and heat treated.

Our custom "coarse spline/18 spline" drive flanges will allow 930 or G50 CV joints (with metal grease caps) to bolt up to the early 1969-75 911s and all 914 transaxles.

Shaft length was designed with the stock open diff in mind. If by off-chance you have a factory LSD, spacers will be required.

Sold in pairs.

Fits
Porsche 911 - 1969 to 1975
Porsche 914

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Related, superseded, cross reference or alternative numbers for comparison.

CMS.914.18T

The product you are viewing cross references to these numbers

Driveshaft Flange, Rear.

The Genuine Porsche Rear Driveshaft Flange is an original equipment drivetrain component designed for selected Porsche 911 Turbo (930) models equipped with the applicable manual gearbox and differential assembly.

Fits:

• Porsche 911 1978-1983 (Turbo)
• Porsche 911 1984-1986 (Turbo)
• Porsche 911 1975-1977 3.0L Turbo (930)  

Diagram Ref No 13

Manufactured to Porsche's original equipment specifications, this driveshaft flange forms part of the rear transmission output arrangement, providing the connection between the gearbox differential and the rear driveshaft.

The Porsche 930 Turbo's engine delivers substantial torque through the gearbox and differential to the rear wheels. The driveshaft flange is a critical part of this connection, allowing rotational force to pass from the differential output to the driveshaft's inner constant velocity (CV) joint.

A correctly fitted flange helps maintain secure driveshaft engagement, correct alignment and reliable transmission of engine torque during acceleration, deceleration and normal driving.

The flange must withstand repeated changes in rotational loading, including the increased drivetrain demands associated with turbocharged engine performance.

Over time, an original flange may become worn or damaged because of repeated torque loading, corrosion, incorrect assembly, loose CV joint fasteners or damage during transmission servicing.

Worn splines, damaged mounting threads or distorted mating surfaces can compromise the connection between the differential output and driveshaft.

This may contribute to excessive drivetrain play, knocking noises, vibration or insecure CV joint mounting.

Damage to the flange's sealing surface may also contribute to gearbox oil leakage around the differential output.

Replacing a worn or defective driveshaft flange with a Genuine Porsche component helps restore the original drivetrain connection, maintain correct torque transmission and preserve the factory transmission assembly.

Ideal for gearbox repairs, differential servicing, driveshaft maintenance and classic Porsche restoration projects, this Genuine Porsche Rear Driveshaft Flange provides an original equipment replacement for compatible Porsche 930 Turbo applications.

What This Product Does:
The rear driveshaft flange is fitted to the output side of the gearbox differential.

Its primary function is to connect the transmission output to the rear driveshaft assembly, allowing engine torque to be transmitted to the driven wheels.

During operation, engine power passes through the clutch and gearbox into the differential.

The differential distributes rotational force through its output flanges to the left and right rear driveshafts.

Each driveshaft then transfers torque to the corresponding rear wheel hub.

The driveshaft flange provides the mounting and rotational connection required for this process.

Its main functions include:

• Transmitting engine torque: Transfers rotational force from the differential output to the rear driveshaft.
• Connecting the inner CV joint: Provides the appropriate mounting interface for the driveshaft's inner constant velocity joint.
• Supporting rear-wheel drive: Enables power from the transmission to reach the rear wheels.
• Maintaining correct driveshaft positioning: Supports the intended alignment of the driveshaft relative to the gearbox.
• Providing secure mechanical attachment: Allows the CV joint to be fastened to the transmission output.
• Supporting smooth power delivery: Maintains a stable mechanical connection during acceleration and deceleration.
• Maintaining differential output engagement: Works with the gearbox output mechanism to transmit rotational movement.
• Supporting gearbox oil sealing: Provides the appropriate rotating surface associated with the differential output sealing arrangement.
• Withstanding drivetrain loading: Operates under the repeated torsional forces generated by the engine.
• Preserving factory drivetrain geometry: Maintains the original Porsche output flange configuration for the correct gearbox application.

The driveshaft flange is separate from the complete driveshaft, CV joint, differential and wheel hub.

Symptoms Of Wear Or Failure:
The rear driveshaft flange is subjected to repeated torque loading, vibration and mechanical stress.

Although designed for long service life, wear or physical damage can affect its connection to the transmission and driveshaft.

Common symptoms of a worn or damaged driveshaft flange include:

• Clunking during acceleration: Excessive movement at the flange or CV joint connection may produce knocking noises when engine torque is applied.
• Clunking during deceleration: Wear may become noticeable when the drivetrain changes from acceleration to engine braking.
• Drivetrain vibration: A distorted or incorrectly centred flange may contribute to vibration while driving.
• Excessive rotational play: Worn spline engagement or retaining components may allow unwanted movement.
• Damaged splines: Excessive wear or mechanical damage can compromise torque transmission.
• Loose CV joint mounting: Damaged mounting points or loose fasteners may allow movement between the flange and driveshaft.
• Stripped mounting threads: Damaged bolt threads may prevent the CV joint from being secured correctly.
• Cracked or fractured flange: Severe loading or previous mechanical damage may weaken the component.
• Corroded mounting surfaces: Corrosion can affect the condition of the CV joint mounting interface.
• Distorted flange face: A damaged mounting surface may prevent the CV joint from seating correctly.
• Gearbox oil leakage: Wear or damage around the output sealing surface may contribute to lubricant escaping.
• Repeated loosening of driveshaft bolts: Incorrect fasteners, damaged mounting faces or improper tightening may compromise secure attachment.
• Visible fretting marks: Movement between connected components may produce abnormal wear around the flange face.
• Damaged retaining hardware: Worn or incorrectly fitted retaining parts may affect flange positioning.
• Unusual metallic noises: Excessive movement within the connection may produce knocking or rattling.
• Loss of drive: Severe failure of the flange or its connection may interrupt torque transfer to the affected driveshaft.

Why Replacement Matters:

Replacing a damaged driveshaft flange is important for maintaining a secure connection between the Porsche 930 Turbo's gearbox differential and rear driveshaft.

A worn flange may allow unwanted movement within the drivetrain, placing additional stress on the CV joint, driveshaft fasteners and gearbox output components.

If the splines, mounting threads or flange face become severely damaged, the driveshaft may no longer be securely connected.

Continued driving with a defective flange can contribute to further drivetrain deterioration and, in severe cases, loss of drive.

Installing a Genuine Porsche replacement Rear Driveshaft Flange helps to:

• Restore reliable torque transmission: Reinstate the original mechanical connection between the gearbox and driveshaft.
• Maintain secure CV joint attachment: Restore the correct mounting interface for the inner driveshaft joint.
• Reduce drivetrain play: Replace worn or damaged components that allow excessive movement.
• Improve drivetrain stability: Maintain correct output flange positioning and alignment.
• Reduce unwanted knocking: Address noises caused by a confirmed defective flange.
• Protect the CV joint: Reduce additional stress resulting from incorrect seating or excessive movement.
• Prevent further mounting damage: Replace damaged threads or mating surfaces before deterioration worsens.
• Support gearbox oil sealing: Restore the appropriate flange sealing surface where wear is contributing to leakage.
• Maintain differential output engagement: Preserve the intended mechanical connection to the transmission.
• Support gearbox rebuilding: Provide an original equipment component during transmission refurbishment.
• Preserve factory specifications: Maintain the original flange design for the applicable Porsche drivetrain.
• Support classic Porsche restoration: Restore worn or damaged original transmission components.
• Maintain Genuine Porsche quality: Use a factory-specified replacement rather than an unverified alternative.

Replacement is particularly recommended when inspection confirms damaged splines, cracks, excessive wear, distorted mounting surfaces or stripped fastening points.

The inner CV joint, output shaft seal, driveshaft mounting bolts and gearbox differential should also be inspected during replacement.

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

93033223200

The product you are viewing cross references to these numbers

Driveshaft Flange, Rear.

The OE MATCH Rear Driveshaft Flange is a replacement drivetrain component associated with Porsche OE reference 93033223200, designed for selected classic Porsche 911 Turbo (930) and Carrera Turbo Look (M491) models equipped with the corresponding manual gearbox and differential assembly.

Fits:

• Porsche 911 1978-1983 (Turbo)
• Porsche 911 1984-1986 (Turbo)
• Porsche 911 1975-1977 3.0L Turbo (930)  

Diagram Ref No 13

The rear driveshaft flange provides the mechanical connection between the gearbox differential output and the rear driveshaft, allowing engine torque to be transferred to the driven wheels.

Manufactured as an aftermarket replacement alternative to the original Porsche component, the OE MATCH flange is intended to restore the correct mechanical connection and mounting arrangement where the corresponding OE specification is required.

The Porsche 930 Turbo drivetrain operates under considerable mechanical loading, particularly during acceleration and changes in engine torque. The driveshaft flange must maintain secure engagement with the differential output while providing a stable mounting interface for the inner constant velocity (CV) joint.

When correctly installed, the flange supports reliable transmission of rotational force from the differential to the driveshaft, maintaining the intended relationship between the gearbox output and rear axle assembly.

Over time, original driveshaft flanges may deteriorate due to repeated torque loading, corrosion, mechanical wear, loose fastening hardware or incorrect installation.

Damage to the flange splines, mounting threads or mating surfaces can compromise its connection to the driveshaft. This may lead to excessive drivetrain movement, vibration, knocking noises or insecure CV joint attachment.

Wear around the differential output sealing surface may also contribute to gearbox oil leakage.

Replacing a damaged or excessively worn driveshaft flange with a correctly specified OE MATCH component helps restore secure driveshaft mounting, maintain dependable torque transmission and support the long-term reliability of the drivetrain.

Ideal for gearbox rebuilding, differential repairs, driveshaft servicing and classic Porsche restoration projects, this replacement flange is intended for applications matching Porsche reference 93033223200.

What This Product Does:
The rear driveshaft flange is a mechanical drivetrain component positioned at the output of the gearbox differential.

Its primary function is to connect the differential output to the inner CV joint of the rear driveshaft.

When the engine produces torque, power passes through the clutch and gearbox into the differential. The differential distributes this rotational force to the rear wheels through its output connections.

The driveshaft flange provides the mounting and engagement arrangement necessary for this transfer of power.

Its main functions include:

• Transmitting engine torque: Transfers rotational movement from the gearbox differential to the rear driveshaft.
• Connecting the inner CV joint: Provides the mounting interface for the driveshaft's inner constant velocity joint.
• Supporting rear-wheel drive: Helps transfer engine power to the driven wheels.
• Maintaining drivetrain alignment: Supports the correct position of the driveshaft relative to the gearbox output.
• Providing secure mechanical attachment: Allows the CV joint to be fastened using the specified mounting hardware.
• Supporting smooth power delivery: Maintains a consistent mechanical connection under acceleration and deceleration.
• Withstanding rotational loading: Operates under the repeated torsional forces generated during driving.
• Maintaining differential output engagement: Works with the transmission output arrangement to transfer torque.
• Supporting gearbox sealing: Provides a rotating surface associated with the relevant differential output oil seal.
• Preserving original drivetrain geometry: Maintains the intended flange arrangement when correctly matched to the gearbox specification.

The driveshaft flange is not the complete driveshaft, CV joint, differential or rear wheel hub. It forms the connection between the differential output and the driveshaft.

Symptoms Of Wear Or Failure:
Rear driveshaft flanges are designed to withstand significant mechanical loads. However, damage can develop through repeated torque changes, corrosion, excessive wear or incorrect installation.

Common symptoms of a worn or damaged driveshaft flange include:

• Clunking during acceleration: Excessive movement at the flange or CV joint connection may produce knocking noises when torque is applied.
• Clunking during deceleration: Wear may become noticeable when drivetrain loading changes during engine braking.
• Drivetrain vibration: A distorted or incorrectly centred flange may contribute to vibration during driving.
• Excessive rotational play: Worn spline engagement or retaining components may allow unwanted movement.
• Damaged splines: Excessive wear or mechanical damage may compromise the flange's connection to the differential output.
• Loose CV joint mounting: Damaged mounting points or incorrectly tightened fasteners may allow the driveshaft connection to move.
• Stripped mounting threads: Damaged bolt threads may prevent the CV joint from being secured correctly.
• Cracked or fractured flange: Severe mechanical loading or previous damage may weaken the component.
• Corroded mounting surfaces: Corrosion may interfere with correct CV joint seating.
• Distorted flange face: Mechanical deformation may prevent the driveshaft joint from sitting evenly against the flange.
• Gearbox oil leakage: Wear around the output sealing surface may contribute to lubricant escaping from the transmission.
• Repeated loosening of CV joint bolts: Damaged mating surfaces, incorrect hardware or improper fastening may cause recurrent loosening.
• Visible fretting marks: Movement between contacting components may produce abnormal surface wear.
• Damaged retaining components: Worn or incorrectly installed retaining hardware may affect flange positioning.
• Metallic drivetrain noises: Excessive movement at the output connection may produce knocking or rattling.
• Loss of drive: Severe failure of the flange or its mounting connection may interrupt torque transfer.

Why Replacement Matters:

Replacing a defective driveshaft flange is important for maintaining the secure transmission of engine torque from the gearbox to the rear wheels.

A damaged flange can allow movement at the differential output, placing additional stress on the driveshaft, inner CV joint and mounting hardware.

If the flange's spline engagement or mounting points become severely worn, the connection may no longer transmit torque reliably.

Continued operation with a defective flange can accelerate wear in surrounding drivetrain components and may eventually lead to a loss of drive.

Installing a correctly matched OE MATCH Rear Driveshaft Flange helps to:

• Restore reliable torque transmission: Reinstate the intended connection between the differential and driveshaft.
• Maintain secure CV joint attachment: Replace damaged mounting surfaces and fastening points.
• Reduce drivetrain play: Address excessive movement caused by a confirmed worn flange.
• Improve drivetrain stability: Restore correct flange positioning where deformation or wear has occurred.
• Reduce knocking and vibration: Help eliminate symptoms caused by defective flange engagement.
• Protect the inner CV joint: Reduce additional stress associated with insecure or misaligned mounting.
• Prevent further mounting damage: Replace worn threads and mating surfaces before deterioration becomes more extensive.
• Support gearbox oil sealing: Restore the appropriate flange sealing surface where damage contributes to leakage.
• Maintain differential output engagement: Preserve the intended mechanical connection with the transmission.
• Support transmission refurbishment: Provide replacement components during gearbox or differential rebuilding.
• Preserve original drivetrain functionality: Maintain the correct mechanical arrangement for the applicable vehicle.
• Support classic Porsche restoration: Replace damaged or worn transmission components.
• Provide an OE MATCH alternative: Offer a replacement option where the corresponding Genuine Porsche component is not selected.

Replacement is particularly recommended when inspection confirms cracked material, damaged splines, excessive wear, distorted mounting surfaces or compromised fastening points.

When replacing the flange, the inner CV joint, driveshaft, differential output seal and retaining hardware should also be examined.

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

93033223200

The product you are viewing cross references to these numbers