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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://design91.uk/images/schemaLogo.png https://design91.uk/images/schemaLogo.png +443456003478 https://design91.uk Facebook Instagram

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CMS.914.18T
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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Related, superseded, cross reference or alternative numbers for comparison.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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93033223205
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Product Information
Driveshaft flange.

porsche

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

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Diagram ref no 3

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Related, superseded, cross reference or alternative numbers for comparison.

93033223205
93033223205

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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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