Driveshaft Flange Long for Manual Gearbox. Porsche 991.1 / 991.2 / 991 GT3 › 99133220900

Driveshaft Flange - Long

Maintain dependable power transfer through your Porsche 911 drivetrain with this Genuine Porsche long driveshaft flange, designed for selected 991-generation manual gearboxes.

Fits:

• Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
• Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
• Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
• Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Speedster 4.0L (510Bhp) 2019
• Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19

Diagram Ref No 20

Mounted at the transmission differential output, the flange provides the connection between the gearbox and driveshaft. Its extended design ensures the driveshaft is correctly positioned and securely attached to the transmission assembly.

Manufactured to Porsche's original specifications, this component is ideal for replacing a damaged or worn flange during gearbox servicing, driveshaft repairs or transmission refurbishment.

Confirm compatibility against the vehicle VIN and transmission code before ordering.

What Does It Do?

The long driveshaft flange connects the differential output of the manual gearbox to the driveshaft.

When the driver engages a gear and releases the clutch, engine power travels through the transmission and differential before reaching the driveshafts.

The flange forms the mechanical connection that transfers this rotational force to the wheels, allowing the vehicle to accelerate and maintain drive.

Its extended profile accommodates the specific gearbox and driveshaft mounting arrangement.

Why Is It Important?

The driveshaft flange handles considerable rotational force during acceleration, gear changes and engine braking.

Maintaining a secure connection is important for smooth power delivery and reducing unnecessary strain on the surrounding drivetrain.

A damaged or worn flange may contribute to:

• Clunking noises when accelerating or changing gear
• Vibration through the drivetrain under load
• Excessive movement at the driveshaft connection
• Wear around the mounting bolts or flange splines
• Damage to adjoining driveshaft or transmission components

These symptoms may also result from worn driveshaft joints, gearbox mountings or differential components.

Why Do Driveshaft Flanges Fail?

Although designed to withstand high mechanical loads, driveshaft flanges can deteriorate through wear or damage.

Common causes include:

• Worn or damaged internal splines
• Repeated high-torque loading
• Loose or incorrectly tightened driveshaft bolts
• Damage to the flange mounting face
• Corrosion around mating surfaces
• Incorrect removal or installation during gearbox repairs

When Should It Be Replaced?

Replacement is recommended when the flange shows cracking, damaged splines, distorted mounting points or excessive wear.

It should also be inspected when removing the driveshafts, rebuilding the manual gearbox or investigating unusual drivetrain noises.

A flange with damaged mounting surfaces should not be reused, as it may prevent the driveshaft from being secured correctly.

Installation Notes

Inspect the gearbox output splines, retaining rings, oil seals and driveshaft mounting hardware before fitting.

Ensure the flange is correctly seated and secured using the appropriate Porsche installation procedure and tightening specifications.

Check the surrounding transmission seals for oil leakage and inspect the completed driveshaft connection before returning the vehicle to service.

Key Features

• Long driveshaft flange configuration For selected Porsche 991.1 and 991.2 manual gearboxes
• Suitable for applicable Porsche 991.2 GT3 manual transmissions
• Connects the gearbox differential output to the driveshaft
• Provides secure transfer of rotational driving force
• Manufactured to original Porsche specifications
• Ideal for gearbox repairs and driveshaft replacement
• Maintains the original drivetrain mounting arrangement

Manual Gearbox Driveshaft Flanges

Porsche 991.1 and 991.2 manual transmissions use differential output flanges to connect the gearbox to the rear driveshafts. These components transfer engine power to the wheels while maintaining the correct driveshaft mounting position.

Genuine Porsche long driveshaft flange provides an original replacement for selected Porsche 911 Carrera, Carrera S, Carrera GTS and 991.2 GT3 manual gearbox applications. It is suitable for replacing worn or damaged transmission output flanges during drivetrain servicing or gearbox refurbishment.

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