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Porsche > 911 & 912 (1965-1989) > 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F) > Gearbox / Transmission > Gearbox Parts >

Driveshaft Flange

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DISPLAYING 1 to 6 (of 6 products)
Billet steel conversion driveshaft / axle flanges. Porsche 911 / 914 - 90133223200, PCG33222300, 91433222301 - CMS.914.18T
2
Billet steel conversion driveshaft / axle flanges. Porsche 911 / 914
CMS.914.18T
Product Information
Product Information
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

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Related, superseded, cross reference or alternative numbers for comparison.

CMS.914.18T
90133223200
PCG33222300
91433222301

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Drive Flange. Porsche 911 1969-1970 - 90133220915
5
Drive Flange. Porsche 911 1969-1970
Last One
90133220915
Product Information
Product Information
Drive Flange.
Restore the correct drivetrain interface on your classic Porsche 911 with this genuine OEM drive flange. Designed for the early 911 series and featuring chilled-casting construction, this joint-flange connects the transmission/differential output to the driveshaft or axle stub, ensuring proper fitment, alignment and torque transfer.
Sold Each.
x2 Required Per Car.

NOTE: LAST 1 IN STOCK

Fits:
  • Porsche 911 1969 2.0L / 912 SWB (F)
  • Porsche 911 1970 2.2L / 2.4L / 2.7L RS LWB (F)

Diagram Ref No 12

What This Product Does:

  • The drive/differential flange is a mechanical component that connects the output of the transmission or differential to the driveshaft or stub axle. It provides a rigid mounting interface for torque transfer from the gearbox/diff to the driveshaft or axle.
  • In vehicles with rear-mounted engines (such as early 911s), the correct flange is critical for aligning rotational components, maintaining correct driveshaft geometry, sealing, and ensuring correct load distribution in the drivetrain.
  • A good flange ensures the driveshaft is properly secured and aligned; if the flange is worn, damaged or the wrong part, then driveline vibration, misalignment, drive-loss or leak issues may occur.

Symptoms & Signs You Might Need Replacement:
  • Driveline vibration or shudder at higher speeds or under load – a worn, damaged or mis-matched flange may cause flex or misalignment.
  • Noise or play at the transmission/differential output – e.g., you hear knocking, clunking or see movement at the flange coupling.
  • Oil leak at the flange mating surface – if the flange’s sealing face is worn or the mating surround is compromised, fluid may leak from the gearbox/differential.

Why Replacement Matters:
  • Reduces risk of vibration, misalignment or failure: A flange that is worn, improperly sized or mismatched can lead to drivetrain or transmission stresses, early bearing wear, or even catastrophic driveshaft failure.
  • Sealing & durability: Proper flange helps maintain gearbox/differential sealing and ensures reliable connection under torsional load.
  • Installation efficiency: When replacing major drivetrain components, installing the correct flange reduces risk of repeat service and ensures correct torque path from engine to wheels.



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

90133220915
90133220915

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Driveshaft Flange. Porsche 911 915 Gearbox - 92333223201
2
Driveshaft Flange. Porsche 911 915 Gearbox
Special Order item
92333223201
Product Information
Product Information
Driveshaft Flange.

porsche

Fits:
Porsche 911 915 Gearbox

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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

92333223201
92333223201

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Expansion screw for joint flange (drive shaft connection). Porsche 911 / 912 65-70 - 90133227511
2
Expansion screw for joint flange (drive shaft connection). Porsche 911 / 912 65-70
Special Order item
90133227511
Product Information
Product Information
Expansion screw for joint flange (drive shaft connection).
Sold each.

porsche

Fits:
Porsche 911 / 912 1965-70

Click 'Zoom in' for large parts diagram.
Diagram ref no 14

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

90133227511
90133227511

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Gearbox flange elastic bolt. Porsche 911/912 - 90133227511
2
Gearbox flange elastic bolt. Porsche 911/912
90133227511/1
Product Information
Product Information
Elastic bolt with center pin for gearbox flange includingring. CNC machined,laser cut and zinc plated.

klassiek

Fits:
Porsche 911 68-71
Porsche 912 68-69

Click 'Zoom in' for large parts diagram.
Diagram ref no 14

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

90133227511
90133227511

The product you are viewing cross references to these numbers
Gearbox flange elastic bolt. Porsche 911/912 65-69 - 90133227501
2
Gearbox flange elastic bolt. Porsche 911/912 65-69
90133227501/1
Product Information
Product Information
Elastic bolt without center pin for gearbox flange includingring. CNC machined,laser cut and zinc plated.

klassiek

Fits:
Porsche 911 / 912 65-69

Click 'Zoom in' for large parts diagram.
Diagram ref no 15

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

90133227501
90133227501

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DISPLAYING 1 to 6 (of 6 products)
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About Driveshaft Flange

Porsche Driveshaft Flanges - Essential Gearbox Connection Components

Porsche driveshaft flanges are critical drivetrain components that connect the driveshafts to the gearbox or differential, allowing engine power to be transferred smoothly to the wheels. Precision-engineered for strength and alignment, these flanges play a vital role in maintaining drivetrain stability, torque delivery, and long-term gearbox reliability.

Available from Design911, Porsche driveshaft flanges are supplied to meet OEM specifications, making them ideal for maintenance, repairs, and performance rebuilds where drivetrain integrity is essential.

What Does a Porsche Driveshaft Flange Do?

The driveshaft flange acts as the mechanical interface between the gearbox output and the driveshaft.

Core Functions:

  • Transfers engine torque from the gearbox to the driveshaft
  • Maintains precise alignment within the drivetrain
  • Supports smooth power delivery under acceleration and load
  • Absorbs rotational forces during gear changes
  • Ensures reliable connection between drivetrain components

Without a correctly functioning driveshaft flange, drivetrain vibration and component wear rapidly increase.

Why Do Driveshaft Flanges Fail?

Driveshaft flanges operate under constant rotational load and are subject to wear over time.

Common Causes of Failure:

  • Metal fatigue from high mileage or aggressive driving
  • Worn splines due to poor lubrication or age
  • Corrosion from moisture ingress
  • Excessive drivetrain vibration or misalignment
  • Increased torque loads from performance upgrades

Failure can lead to knocking noises, vibration under acceleration, oil leaks, or complete drivetrain disengagement.

When Should a Driveshaft Flange Be Replaced?

A Porsche driveshaft flange should be inspected and replaced if any of the following symptoms occur:

  • Visible wear or damage to splines
  • Excessive play or looseness in the drivetrain
  • Oil leakage from the gearbox flange seal
  • Clunking or vibration during acceleration
  • During gearbox rebuilds or clutch replacements

Preventative replacement during gearbox servicing can help avoid costly drivetrain damage.

Highlights

  • Essential Porsche gearbox-to-driveshaft connection component
  • Maintains drivetrain alignment and torque transfer
  • Manufactured to OEM specifications
  • Ideal for maintenance, repairs, and rebuilds
  • Helps eliminate vibration and premature drivetrain wear

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