Elring 178.950 Manual Transmission Main Shaft Seal

OE Quality 60-Day Returns

Elring 178.950 Manual Transmission Main Shaft Seal

Brand	Elring 178.950
Dust Cover	with dust lip
Inside Diameter	24.9
Material	ACM (Polyacrylate)
Outside Diameter	40.0
Radial Shaft Seal Design	ASW
Swirl Type	RD
Thickness	8.0
Fits	Audi · 113 vehicles

Shaft seal design. ASW construction with a dust lip helps keep contaminants out.

Polyacrylate material. ACM construction offers dependable sealing performance.

Transmission sealing. Built for manual transmission main shaft applications.

Cross-references National 222540, 012 311 113 B and 01036174B for the same application. See all 4.

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Manual Transmission Main Shaft Seal for Audi and Porsche

Elring 178.950 is a manual transmission main shaft seal built for precise shaft sealing in a range of Audi and Porsche applications. It uses ACM (polyacrylate) material with a dust lip to help keep transmission fluid contained while resisting contamination at the shaft opening.

Compatible with select Audi A4, A6, S4, S6, RS4, RS6, S8, 80, 90, 100, 200, V8 Quattro, and 5000 Quattro models, as well as Porsche 718 Boxster, 718 Cayman, and 718 Spyder applications, Elring 178.950 is specified for manual transmission main shaft service where the listed dimensions match the original seal.

Key Features

Manual transmission main shaft seal for transmission sealing service
Inside diameter: 24.9 mm
Outside diameter: 40.0 mm
Thickness: 8.0 mm
ACM (polyacrylate) sealing material for transmission use
Dust cover with dust lip for added contamination control
Radial shaft seal design: ASW
Swirl type: RD, right-hand twist

Detailed Description

Elring 178.950 is engineered as a radial shaft seal for the manual transmission main shaft, with dimensions and sealing profile that match the listed OE-style applications. The 24.9 mm inner diameter, 40.0 mm outer diameter, and 8.0 mm thickness are important for proper fitment in Audi and Porsche manual gearbox assemblies. This part cross-references National 222540 for the same application.

Use this seal when servicing transmissions on vehicles such as the Audi A4, Audi A6 Quattro, and Porsche 718 Cayman, where the correct shaft seal is critical to maintaining fluid retention and reducing contamination at the transmission input area. Part number 178.950 is also referenced by OE numbers 012 311 113 B, 01036174B, and 01036301B.

What This Part Helps Address

Transmission fluid seepage at the main shaft seal area
Contamination entering the transmission through the shaft opening
Wear-related sealing loss on high-mileage manual gearboxes
Noise or drivability concerns linked to low transmission fluid level
Repeat leaks caused by an incorrect seal size or profile

Installation Notes and Tips

Verify the shaft diameter, seal thickness, and outer diameter before installation to confirm the seal matches the transmission case. The right-hand twist swirl design and dust lip should be matched to the original application, especially on Audi 80, 90 Quattro, 200 Quattro, and 5000 Quattro fitments where the notes specify 8 mm width, 24.9 mm inner diameter, and 40 mm outer diameter.

Inspect the shaft surface and seal bore for scoring, corrosion, or debris before installing the new seal. Clean the sealing area thoroughly and confirm the transmission is the correct manual gearbox application before reassembly.

Quality Assurance

Elring is a recognized sealing-system brand with OE-level application coverage across European vehicles. Part number 178.950 is built to the listed dimensional and material specifications for accurate transmission sealing service.

Fits 2017-2023 Porsche 718 Boxster, N/A
Fits 2017-2023 Porsche 718 Cayman, N/A
Fits 2020-2023 Porsche 718 Spyder, N/A
Fits 2008-2011 Audi A6, N/A
Fits 1995-2006 Audi A6, N/A
Fits 2007-2011 Audi A6 Quattro, N/A
Fits 2010 Audi RS6, N/A
Fits 2003-2004 Audi RS6, N/A
Fits 2007-2010 Audi S8, N/A
Fits 1996-2009 Audi A4, N/A
Fits 2007-2008 Audi RS4, N/A
Fits 2004-2006 Audi S4, N/A
Fits 2001-2002 Audi S4, N/A
Fits 2002-2003 Audi A4 Quattro, N/A
Fits 2002 Audi S6, N/A
Fits 1995 Audi S6, N/A
Fits 1989-1994 Audi 100, N/A
Fits 1989-1994 Audi 100 Quattro, N/A
Fits 1988-1992 Audi 80, N/A. Fitment note: Width 8 mm, inner diameter 24.9 mm, outer diameter 40 mm, dust cover with dust lip, swirl type right-hand twist.
Fits 1991-1992 Audi 80 Quattro, N/A
Fits 1990-1992 Audi 90 Quattro, N/A. Fitment note: Width 8 mm, inner diameter 24.9 mm, outer diameter 40 mm, dust cover with dust lip, swirl type right-hand twist.
Fits 1989-1991 Audi 200, N/A. Fitment note: Width 8 mm, inner diameter 24.9 mm, outer diameter 40 mm, dust cover with dust lip, swirl type right-hand twist.
Fits 1989-1991 Audi 200 Quattro, N/A. Fitment note: Width 8 mm, inner diameter 24.9 mm, outer diameter 40 mm, dust cover with dust lip, swirl type right-hand twist.
Fits 1988-1991 Audi 90, N/A
Fits 1990-1991 Audi V8 Quattro, N/A
Fits 1988-1990 Audi 80 Quattro, N/A. Fitment note: Width 8 mm, inner diameter 24.9 mm, outer diameter 40 mm, dust cover with dust lip, swirl type right-hand twist.
Fits 1988-1989 Audi 90 Quattro, N/A
Fits 1987-1988 Audi 5000 Quattro, N/A. Fitment note: Width 8 mm, inner diameter 24.9 mm, outer diameter 40 mm, dust cover with dust lip, swirl type right-hand twist.
Fits 1987 Audi Coupe, N/A

This part fits 113 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Submodel	Body Type	Drive Type	Transmission	Liters	Cylinders	Fuel Type	Position	Notes
2023	Porsche	718 Boxster	—	—	—	—	4.0L	H6	GAS	N/A	—
2023	Porsche	718 Cayman	—	—	—	—	4.0L	H6	GAS	N/A	—
2023	Porsche	718 Spyder	—	—	—	—	4.0L	H6	GAS	N/A	—
2022	Porsche	718 Boxster	—	—	—	—	4.0L	H6	GAS	N/A	—
2022	Porsche	718 Cayman	—	—	—	—	4.0L	H6	GAS	N/A	—
2022	Porsche	718 Spyder	—	—	—	—	4.0L	H6	GAS	N/A	—
2021	Porsche	718 Boxster	—	—	—	—	4.0L	H6	GAS	N/A	—
2021	Porsche	718 Cayman	—	—	—	—	4.0L	H6	GAS	N/A	—
2021	Porsche	718 Spyder	—	—	—	—	4.0L	H6	GAS	N/A	—
2020	Porsche	718 Boxster	—	—	—	—	2.5L	H4	GAS	N/A	—
2020	Porsche	718 Cayman	—	—	—	—	4.0L	H6	GAS	N/A	—
2020	Porsche	718 Spyder	—	—	—	—	4.0L	H6	GAS	N/A	—
2019	Porsche	718 Boxster	—	—	—	—	2.5L	H4	GAS	N/A	—
2019	Porsche	718 Cayman	—	—	—	—	2.5L	H4	GAS	N/A	—
2018	Porsche	718 Boxster	—	—	—	—	2.5L	H4	GAS	N/A	—
2018	Porsche	718 Cayman	—	—	—	—	2.5L	H4	GAS	N/A	—
2017	Porsche	718 Boxster	—	—	—	—	2.5L	H4	GAS	N/A	—
2017	Porsche	718 Cayman	—	—	—	—	2.5L	H4	GAS	N/A	—
2011	Audi	A6	Base	Sedan	FWD	—	3.2L	V6	—	N/A	—
2011	Audi	A6 Quattro	Avant	Wagon	AWD	—	3.0L	V6	—	N/A	—
2010	Audi	A6	Base	Sedan	FWD	—	3.2L	V6	—	N/A	—
2010	Audi	A6 Quattro	Base	Sedan	AWD	—	4.2L	V8	—	N/A	—
2010	Audi	RS6	Avant	Wagon	AWD	—	5.0L	V10	—	N/A	—
2010	Audi	S8	Base	Sedan	AWD	—	5.2L	V10	—	N/A	—
2009	Audi	A4	Cabriolet	Convertible	FWD	—	2.0L	L4	—	N/A	—
2009	Audi	A6	Base	Sedan	FWD	—	3.2L	V6	—	N/A	—
2009	Audi	A6 Quattro	Base	Sedan	AWD	—	4.2L	V8	—	N/A	—
2009	Audi	S8	Base	Sedan	AWD	—	5.2L	V10	—	N/A	—
2008	Audi	A4	Base	Sedan	FWD	—	3.2L	V6	—	N/A	—
2008	Audi	A6	Luxury	Sedan	FWD	—	2.8L	V6	—	N/A	—
2008	Audi	A6 Quattro	Base	Sedan	AWD	—	4.2L	V8	—	N/A	—
2008	Audi	RS4	Base	Sedan	AWD	—	4.2L	V8	—	N/A	—
2008	Audi	S8	Base	Sedan	AWD	—	5.2L	V10	—	N/A	—
2007	Audi	A4	Elite	Sedan	FWD	—	3.2L	V6	—	N/A	—
2007	Audi	A6 Quattro	Base	Sedan	AWD	—	4.2L	V8	—	N/A	—
2007	Audi	RS4	Base	Sedan	AWD	—	4.2L	V8	—	N/A	—
2007	Audi	S8	Base	Sedan	AWD	—	5.2L	V10	—	N/A	—
2006	Audi	A4	Elite	Sedan	FWD	—	3.2L	V6	—	N/A	—
2006	Audi	A6	Elite	Sedan	FWD	—	3.0L	V6	—	N/A	—
2006	Audi	S4	Avant	Wagon	AWD	—	4.2L	V8	—	N/A	—
2005	Audi	A4	Elite	Sedan	FWD	—	3.2L	V6	—	N/A	—
2005	Audi	A6	Confort	Sedan	FWD	—	3.0L	V6	—	N/A	—
2005	Audi	S4	Avant	Wagon	AWD	—	4.2L	V8	—	N/A	—
2004	Audi	A4	Avant	Wagon	FWD	—	3.0L	V6	—	N/A	—
2004	Audi	A6	Base	Sedan	FWD	—	3.0L	V6	—	N/A	—
2004	Audi	RS6	Base	Sedan	AWD	—	4.2L	V8	—	N/A	—
2004	Audi	S4	Avant	Wagon	AWD	—	4.2L	V8	—	N/A	—
2003	Audi	A4	Base	Sedan	FWD	—	1.8L	L4	—	N/A	—
2003	Audi	A4 Quattro	Avant	Wagon	AWD	—	3.0L	V6	—	N/A	—
2003	Audi	A6	Base	Sedan	FWD	—	3.0L	V6	—	N/A	—
2003	Audi	RS6	Base	Sedan	AWD	—	4.2L	V8	—	N/A	—
2002	Audi	A4	Base	Sedan	FWD	—	1.8L	L4	—	N/A	—
2002	Audi	A4 Quattro	Avant	Wagon	AWD	—	3.0L	V6	—	N/A	—
2002	Audi	A6	Base	Sedan	FWD	—	3.0L	V6	—	N/A	—
2002	Audi	S4	Avant	Wagon	AWD	—	2.7L	V6	—	N/A	—
2002	Audi	S6	Avant	Wagon	AWD	—	4.2L	V8	—	N/A	—
2001	Audi	A4	Base	Sedan	FWD	—	2.8L	V6	—	N/A	—
2001	Audi	A6	Base	Sedan	FWD	—	2.8L	V6	—	N/A	—
2001	Audi	S4	Avant	Wagon	AWD	—	2.7L	V6	—	N/A	—
2000	Audi	A4	Base	Sedan	FWD	—	2.8L	V6	—	N/A	—
2000	Audi	A6	Base	Sedan	FWD	—	2.8L	V6	—	N/A	—
1999	Audi	A4	Base	Sedan	FWD	—	2.8L	V6	—	N/A	—
1999	Audi	A6	Base	Sedan	FWD	—	2.8L	V6	—	N/A	—
1998	Audi	A4	Base	Sedan	FWD	—	2.8L	V6	—	N/A	—
1998	Audi	A6	Base	Sedan	FWD	—	2.8L	V6	—	N/A	—
1997	Audi	A4	Base	Sedan	FWD	—	2.8L	V6	—	N/A	—
1997	Audi	A6	Avant	Wagon	FWD	—	2.8L	V6	—	N/A	—
1996	Audi	A4	Base	Sedan	FWD	—	2.8L	V6	—	N/A	—
1996	Audi	A6	Avant	Wagon	FWD	—	2.8L	V6	—	N/A	—
1995	Audi	A6	Avant	Wagon	FWD	—	2.8L	V6	—	N/A	—
1995	Audi	S6	Avant	Wagon	AWD	—	2.2L	L5	—	N/A	—
1994	Audi	100	—	—	—	—	2.8L	V6	GAS	N/A	—
1994	Audi	100 Quattro	—	—	—	—	2.8L	V6	GAS	N/A	—
1993	Audi	100	—	—	—	—	2.8L	V6	GAS	N/A	—
1993	Audi	100 Quattro	—	—	—	—	2.8L	V6	GAS	N/A	—
1992	Audi	100	—	—	—	—	2.8L	V6	GAS	N/A	—
1992	Audi	100 Quattro	—	—	—	—	2.8L	V6	GAS	N/A	—
1992	Audi	80	—	—	—	Manual	2.3L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1992	Audi	80 Quattro	—	—	—	—	2.3L	L5	GAS	N/A	—
1992	Audi	90 Quattro	—	—	—	—	2.3L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1991	Audi	100	—	—	—	—	2.3L	L5	GAS	N/A	—
1991	Audi	100 Quattro	—	—	—	—	2.3L	L5	GAS	N/A	—
1991	Audi	200	—	—	—	Manual	2.2L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1991	Audi	200 Quattro	—	—	—	—	2.2L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1991	Audi	80	—	—	—	Manual	2.3L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1991	Audi	80 Quattro	—	—	—	—	2.3L	L5	GAS	N/A	—
1991	Audi	90	—	—	—	—	2.3L	L5	GAS	N/A	—
1991	Audi	90 Quattro	—	—	—	—	2.3L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1991	Audi	V8 Quattro	Base	Sedan	AWD	—	3.6L	V8	—	N/A	—
1990	Audi	100	—	—	—	—	2.3L	L5	GAS	N/A	—
1990	Audi	100 Quattro	—	—	—	—	2.3L	L5	GAS	N/A	—
1990	Audi	200	—	—	—	Manual	2.2L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1990	Audi	200 Quattro	—	—	—	—	2.2L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1990	Audi	80	—	—	—	Manual	2.0L	L4	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1990	Audi	80 Quattro	—	—	—	—	2.3L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1990	Audi	90	—	—	—	—	2.3L	L5	GAS	N/A	—
1990	Audi	90 Quattro	—	—	—	—	2.3L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1990	Audi	V8 Quattro	Base	Sedan	AWD	—	3.6L	V8	—	N/A	—
1989	Audi	100	—	—	—	—	2.3L	L5	GAS	N/A	—
1989	Audi	100 Quattro	—	—	—	—	2.3L	L5	GAS	N/A	—
1989	Audi	200	—	—	—	Manual	2.2L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1989	Audi	200 Quattro	—	—	—	—	2.2L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1989	Audi	80	—	—	—	Manual	2.0L	L4	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1989	Audi	80 Quattro	—	—	—	—	2.3L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1989	Audi	90	—	—	—	—	2.3L	L5	GAS	N/A	—
1989	Audi	90 Quattro	—	—	—	—	2.3L	L5	GAS	N/A	—
1988	Audi	5000 Quattro	—	—	—	—	2.3L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1988	Audi	80	—	—	—	Manual	2.0L	L4	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1988	Audi	80 Quattro	—	—	—	—	2.3L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1988	Audi	90	—	—	—	—	2.3L	L5	GAS	N/A	—
1988	Audi	90 Quattro	—	—	—	—	2.3L	L5	GAS	N/A	—
1987	Audi	5000 Quattro	—	—	—	—	2.3L	L5	—	N/A	Fitment Note: Width 8mm, Inner Diameter 24.9mm, Outer Diameter 40mm, Dust Cover with dust lip, Swirl Type Right-hand Twist.
1987	Audi	Coupe	GT	Coupe	FWD	—	2.3L	L5	—	N/A	—
No rows match your filter.

Directly replaces or cross-references 4 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

National — 222540012 311 113 B01036174B01036301B