Driveshaft Flange

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Related, superseded, cross reference or alternative numbers for comparison.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

Driveshaft Flange.

The OE MATCH Driveshaft Flange is a replacement drivetrain component designed for selected classic Porsche 911 models equipped with the 915 manual gearbox. 
Sold Each.
x2 Required Per Car.

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 SC
• Porsche 911 1984-1986 3.2L  

Diagram Ref No 3

Manufactured as an alternative to the original Porsche component, this driveshaft flange is associated with Porsche OE reference 92333223201 and is intended to restore the connection between the gearbox differential output and the rear driveshaft assembly.

The driveshaft flange plays an essential role in transferring engine power from the transmission to the rear wheels. It provides the mounting interface for the inner constant velocity (CV) joint, allowing rotational force from the gearbox to pass through the driveshaft.

The Porsche 915 gearbox is used in numerous classic 911 models. Its differential and driveshaft assemblies must remain correctly aligned and securely connected to transmit engine torque smoothly during acceleration, deceleration and normal driving.

A properly fitted driveshaft flange supports the secure attachment of the driveshaft, maintains the intended rotational connection and helps minimise unwanted movement within the drivetrain.

Over time, the original flange may become worn or damaged due to repeated torque loading, vibration, corrosion, loose driveshaft fasteners or mechanical damage during gearbox servicing.

Worn splines, damaged mounting threads or distorted mating surfaces can compromise the connection between the gearbox and driveshaft. This may lead to excessive drivetrain play, vibration, knocking noises or problems with the inner CV joint attachment.

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

Replacing a worn or defective flange with an appropriate OE MATCH component helps restore the original driveshaft mounting arrangement, support reliable torque transmission and maintain the integrity of the gearbox output assembly.

Ideal for classic Porsche gearbox repairs, differential servicing, driveshaft maintenance and restoration projects, this OE MATCH Driveshaft Flange provides a replacement option for vehicles using the corresponding 915 gearbox flange specification.

What This Product Does:
The driveshaft flange is a mechanical connection component fitted to the output side of the gearbox differential.

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

When engine power passes through the gearbox, the differential distributes torque to the rear wheels through its output connections.

The driveshaft flange rotates with the appropriate differential output and transfers that rotation to the driveshaft assembly.

The driveshaft then carries torque to the rear wheel hub, allowing the vehicle to move.

The flange must maintain the correct fit, alignment and mechanical strength to support this continuous transfer of rotational force.

Its main functions include:

• Transferring engine torque: Provides the connection through which power passes from the gearbox differential to the driveshaft.
• Connecting the inner CV joint: Offers the mounting interface for the inner constant velocity joint assembly.
• Supporting driveshaft rotation: Allows the driveshaft to rotate with the corresponding gearbox output.
• Maintaining drivetrain alignment: Supports the correct positioning of the driveshaft relative to the gearbox.
• Providing secure fastening: Allows the inner driveshaft joint to be attached using the specified mounting hardware.
• Supporting smooth power delivery: Helps maintain a stable mechanical connection during acceleration and deceleration.
• Maintaining differential output engagement: Works with the gearbox output arrangement to transmit rotational movement.
• Supporting gearbox sealing: Provides the relevant rotating surface associated with the differential output oil seal.
• Preserving original drivetrain geometry: Maintains the intended connection dimensions for the applicable 915 transmission.
• Supporting drivetrain reliability: Helps prevent excessive movement caused by a worn or incorrectly fitted flange.

The driveshaft flange is not the complete driveshaft, CV joint or gearbox differential. It is the connecting component between the transmission output and the driveshaft assembly.

Symptoms Of Wear Or Failure:
Driveshaft flanges operate under repeated rotational loading and are exposed to engine torque, vibration and mechanical stress.

Although designed for long service life, damage may occur through wear, corrosion, incorrect installation or the loosening of associated driveshaft fasteners.

Common symptoms of a worn or damaged driveshaft flange include:

• Clunking during acceleration: Excessive movement within the drivetrain connection may produce knocking or clunking noises when engine torque is applied.
• Clunking during deceleration: Wear in the flange connection or associated drivetrain components may become noticeable when the load direction changes.
• Drivetrain vibration: A distorted or incorrectly centred flange may contribute to vibration during driving.
• Excessive rotational play: Wear at the gearbox output connection may create unwanted movement.
• Damaged splines: Worn or stripped spline engagement can compromise the transfer of torque.
• Loose driveshaft connection: Damaged mounting points or loose fasteners may allow movement between the CV joint and flange.
• Damaged bolt threads: Stripped or worn fastening threads may prevent the driveshaft from being secured correctly.
• Cracked or fractured flange: Severe mechanical loading or impact damage may cause structural failure.
• Corrosion around mounting surfaces: Surface deterioration may affect correct seating of the CV joint.
• Distorted mating surfaces: Mechanical damage may prevent the inner CV joint from sitting correctly against the flange.
• Gearbox oil leakage: Wear or damage around the differential output sealing surface may contribute to oil escaping from the gearbox.
• Repeated CV joint bolt loosening: Damaged mounting surfaces, unsuitable hardware or incorrect installation may prevent reliable fastening.
• Uneven wear around the connection: Excessive movement may create visible wear marks or fretting on the mating surfaces.
• Damaged retaining arrangements: Wear or damage to the gearbox output flange retaining components may compromise secure installation.
• Loss of drive: Severe failure of the flange connection may prevent torque from being transmitted correctly to the affected driveshaft.

Why Replacement Matters:
Replacing a damaged driveshaft flange is important for maintaining a secure connection between the Porsche 915 gearbox and the rear driveshaft.

A worn flange may allow unwanted movement at the gearbox output, potentially increasing stress on the CV joint, driveshaft mounting bolts and surrounding transmission components.

If the flange's mounting threads or splines are damaged, the connection may no longer be capable of transmitting torque reliably.

Continued operation with a severely worn or loose driveshaft flange can lead to additional drivetrain damage and, in extreme cases, loss of drive.

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

• Restore reliable torque transmission: Reinstate the intended mechanical connection between the differential output and driveshaft.
• Maintain secure CV joint attachment: Replace worn or damaged mounting surfaces and fastening points.
• Reduce unwanted drivetrain play: Restore the correct mechanical engagement where flange wear has been confirmed.
• Improve drivetrain stability: Help eliminate vibration associated with a damaged or distorted flange.
• Address knocking noises: Replace a defective flange that contributes to excessive movement during acceleration or deceleration.
• Protect driveshaft components: Reduce additional stress on the CV joint and connecting hardware.
• Prevent further mounting damage: Replace damaged threads or mating surfaces before the connection deteriorates further.
• Support gearbox sealing: Restore the appropriate flange sealing surface where wear is contributing to an oil leak.
• Maintain correct gearbox output alignment: Preserve the intended relationship between the differential and driveshaft.
• Support gearbox rebuilding: Provide replacement output flange components during 915 transmission refurbishment.
• Restore original drivetrain functionality: Maintain the design and operation of the applicable Porsche drivetrain.
• Support classic Porsche restoration: Replace ageing or mechanically damaged transmission components.
• Provide an OE MATCH replacement option: Offer an alternative to the Genuine Porsche component where the correct specifications are matched.

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

When replacing the flange, the inner CV joint, output shaft seal, retaining hardware and gearbox differential components should also be inspected.

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

92333223201

The product you are viewing cross references to these numbers

Driveshaft flange.

Fits:
Porsche 911 Turbo 930.36/37 1984-88
Porsche 911 Carrera M491 915.72/73 Turbo Look 1984-88

Diagram ref no 3

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

93033223205

The product you are viewing cross references to these numbers

Driveshaft Flange.

The OE MATCH Driveshaft Flange is a replacement drivetrain component associated with Porsche original equipment reference 93033223205, designed for selected classic Porsche 911 Turbo (930) and 911 Carrera Turbo Look (M491) models equipped with the corresponding manual gearbox and differential configuration.

Fits:

• Porsche 911 Turbo 930.36/37 1984-88
• Porsche 911 Carrera M491 915.72/73 Turbo Look 1984-88

Diagram Ref No 3

The driveshaft flange forms part of the rear drivetrain assembly, providing the mechanical connection between the gearbox differential output and the inner constant velocity (CV) joint of the rear driveshaft.

Manufactured as an aftermarket alternative to the original Porsche component, the OE MATCH flange is intended to replace a worn or damaged output flange where the corresponding dimensions, spline arrangement and mounting specifications match the vehicle.

The Porsche 911 Turbo drivetrain is designed to transmit considerable engine torque to the rear wheels. During acceleration, deceleration and gear changes, the driveshaft flange experiences repeated rotational loading as power passes through the differential and driveshaft assembly.

A correctly fitted flange supports secure driveshaft attachment, accurate alignment and reliable transmission of rotational force.

Its mounting face must provide proper contact with the inner CV joint, while its differential engagement must remain secure under normal operating loads.

Over time, an original flange may become damaged through repeated torque loading, mechanical wear, corrosion, loose CV joint bolts or incorrect installation.

Worn splines, damaged mounting threads or distorted contact surfaces can compromise the connection between the gearbox and driveshaft, potentially causing vibration, knocking noises or excessive drivetrain movement.

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

Replacing a defective driveshaft flange with a correctly matched OE MATCH component helps restore the intended mechanical connection, maintain reliable torque transmission and support the long-term operation of the drivetrain.

What This Product Does:
The 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, allowing engine torque to reach the driven wheels.

When the engine produces power, rotational force passes through the clutch, gearbox and differential.

The differential distributes this force through the output flanges to the rear driveshafts. Each driveshaft then transfers torque to its corresponding rear wheel.

The flange must maintain accurate engagement with the differential output and provide a secure mounting surface for the inner CV joint.

Its main functions include:

• Transmitting engine torque: Transfers rotational force 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: Allows power from the transmission to reach the driven wheels.
• Maintaining drivetrain alignment: Supports the correct positioning of the driveshaft relative to the gearbox.
• Providing secure mechanical attachment: Allows the driveshaft joint to be fastened using the specified mounting hardware.
• Supporting smooth power delivery: Maintains a stable mechanical connection during acceleration and deceleration.
• Withstanding rotational loading: Operates under the repeated torsional forces generated during normal driving.
• Maintaining differential output engagement: Works with the gearbox output arrangement to transfer rotation.
• Supporting gearbox sealing: Provides a rotating surface associated with the differential output oil seal.
• Preserving original drivetrain geometry: Maintains the intended flange arrangement when matched to the correct transmission specification.

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

Symptoms Of Wear Or Failure:
Rear driveshaft flanges are generally durable components, but prolonged mechanical loading, incorrect installation or physical damage can affect their condition.

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 the direction of drivetrain loading changes.
• Drivetrain vibration: A distorted or incorrectly centred flange may contribute to unwanted vibration during driving.
• Excessive rotational play: Damaged spline engagement or retaining components may allow movement between connected parts.
• Damaged splines: Worn or stripped splines may compromise the connection to the differential output.
• Loose CV joint mounting: Damaged mounting points or loose fasteners may prevent secure driveshaft attachment.
• Stripped mounting threads: Damaged bolt threads may make it difficult to fasten the CV joint correctly.
• Cracked or fractured flange: Excessive loading or impact damage may weaken the component.
• Corroded mounting surfaces: Corrosion may interfere with proper CV joint seating.
• Distorted flange face: Mechanical damage may prevent even contact between the flange and inner CV joint.
• Gearbox oil leakage: Damage to the flange's sealing surface may contribute to oil escaping around the differential output.
• Repeated loosening of driveshaft bolts: Worn mating surfaces or incorrect hardware may compromise bolt retention.
• Visible fretting marks: Abnormal movement can produce wear marks around the flange and CV joint mounting surfaces.
• Damaged retaining components: Defective retaining hardware may affect flange positioning or security.
• Unusual metallic drivetrain noises: Excessive play may produce knocking or rattling under load.
• Loss of drive: Severe damage or failure of the flange connection may interrupt torque transfer to the affected driveshaft.

Why Replacement Matters:
Replacing a damaged driveshaft flange is important for maintaining the secure connection between the gearbox differential and rear driveshaft.

A worn flange may allow excessive movement at the gearbox output, placing additional stress on the inner CV joint, driveshaft mounting bolts and associated components.

If the flange develops damaged splines, cracks or severely worn mounting surfaces, the drivetrain connection may no longer operate reliably.

Continued use of a damaged flange can accelerate wear in surrounding components and, in severe cases, lead to driveshaft connection failure or loss of drive.

Installing a correctly matched OE MATCH Driveshaft Flange helps to:

• Restore reliable torque transmission: Reinstate the intended connection between the gearbox differential and driveshaft.
• Maintain secure CV joint mounting: Replace damaged mounting surfaces and fastening points.
• Reduce excessive drivetrain play: Address unwanted movement caused by a confirmed worn flange.
• Improve drivetrain stability: Restore the correct flange position where wear or distortion has occurred.
• Reduce knocking and vibration: Help resolve symptoms caused by defective flange engagement.
• Protect surrounding drivetrain components: Reduce unnecessary stress on the CV joint and connecting hardware.
• Prevent further mounting damage: Replace worn threads and damaged mating surfaces before deterioration worsens.
• Support gearbox oil sealing: Restore the correct flange surface where damage is contributing to leakage.
• Maintain differential output engagement: Preserve secure mechanical contact with the transmission.
• Support gearbox rebuilding: Provide a replacement output component during transmission refurbishment.
• Maintain original drivetrain functionality: Restore the intended connection for the applicable gearbox configuration.
• Support classic Porsche restoration: Replace worn or damaged transmission components.
• Provide an OE MATCH replacement option: Offer an aftermarket alternative to the corresponding original Porsche component.

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

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

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

93033223205

The product you are viewing cross references to these numbers

Driveshaft Flange.

Fits:
Porsche 911 915 Gearbox

Diagram ref no 3

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

92333223201

The product you are viewing cross references to these numbers