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Related, superseded, cross reference or alternative numbers for comparison.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

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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

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

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

Related reference numbers
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93033223205

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Driveshaft Flange.



Fits:
Porsche 911 915 Gearbox

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

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92333223201

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Expansion screw for joint flange (drive shaft connection).
Sold each.



Fits:
Porsche 911 / 912 1965-70

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

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90133227511

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Elastic bolt with center pin for gearbox flange includingring. CNC machined,laser cut and zinc plated.



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

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

Related reference numbers
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90133227511

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Elastic bolt without center pin for gearbox flange includingring. CNC machined,laser cut and zinc plated.



Fits:
Porsche 911 / 912 65-69

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

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90133227501

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Gearbox flange expansion screw. 
Sold each.



Fits:
Porsche 911/912 1965-69

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

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90133227502

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Limited slip differential cap.



Fits:
Porsche 911 / S / L >>1968
Porsche 912 >>1967

Click 'Zoom in' for large parts diagram.
Diagram ref no 17



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90133223902

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Thrust washer driveshaft flange. 
Sold each - 2 required per car



Fits:
Porsche 911 2.0ltr - 1965 to 1967

Click 'Zoom in' for large parts diagram.
Diagram ref no 16

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90133226101

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