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- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
ATF Reservoir to Gearbox Sump Seal – O-Ring (924 / 928 / 944 / 968)
High-quality replacement O-ring seal designed for the connection between the automatic transmission fluid (ATF) reservoir and the gearbox sump.
This critical sealing component ensures a tight and leak-free connection at the transition point between the filler container and the transmission oil pan, maintaining proper fluid circulation and system integrity.
Fits:
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Diagram ref no 41
Manufactured to OEM specifications, this seal is essential for preventing leaks and ensuring reliable operation of Porsche automatic transmission systems.
Key Features
• Direct replacement O-ring seal for ATF reservoir
connection
• Designed for gearbox sump / transmission oil pan interface
• OEM-style fit and sealing performance
• Helps prevent ATF leaks and contamination
• Durable material for long-term reliability
• Essential maintenance component for automatic transmissions
Function and Purpose
This O-ring seal ensures a secure connection between the ATF reservoir and gearbox sump.
It helps to:
• Prevent transmission fluid leaks
• Maintain proper system pressure and flow
• Protect against dirt and contamination
• Support long-term gearbox performance
Why Replace This Seal
Over time, O-rings can degrade due to heat, pressure, and fluid exposure.
Common issues include:
• ATF leaks at the reservoir connection
• Hardened or brittle seal material
• Loss of sealing integrity
• Reduced transmission efficiency
Replacing the seal ensures continued reliability and prevents costly transmission issues.
Maintain the reliability and performance of your Porsche automatic transmission with this ATF reservoir to gearbox sump O-ring seal, designed for Porsche 924, 928, 944, and 968 models.
This OEM-style seal ensures a secure connection between the transmission fluid reservoir and oil pan, preventing leaks and maintaining proper system function. It is a vital component for both routine maintenance and restoration work.
Whether you are addressing a fluid leak or carrying out preventative servicing, this Porsche transmission O-ring provides a simple but essential solution.
Ideal for Porsche Transmission Maintenance & Repair
This product is optimised for enthusiasts searching for:
• Porsche ATF reservoir to sump seal replacement
• Porsche transmission O-ring 477321487
• Porsche 928 automatic gearbox seal
• Porsche 944 968 ATF reservoir seal
• Porsche transmission leak repair parts
These long-tail keywords target high-intent buyers performing maintenance or repair work.
OEM-Style Accuracy and Fitment
Manufactured to match original specifications:
• Correct fit for Porsche automatic transmission systems
• Reliable sealing performance under pressure
• Durable materials for long-term use
• Direct replacement with no modification required
Why This Seal Matters
Prevents Fluid Leaks
Maintains correct transmission fluid levels.
Protects Transmission System
Prevents contamination and pressure loss.
Essential Maintenance Item
Small part with critical importance for gearbox health.
Related reference numbers
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477321487
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- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
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- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- 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 GT3 3.8L (475 Bhp) 2014-16
- 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 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Targa 4 3.0L 2020-24
- Porsche 992.1 Targa 4S / GTS 3.0L 2020-24
- Porsche 992.1 Speedster 4.0L 2019-24
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- Porsche 970.1 Panamera S V8 4.8L 2009-13
- Porsche 970.1 Panamera 4S V8 4.8L 2009-13
- Porsche 970.1 Panamera GTS V8 4.8L 2011-13
- Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
- Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
- Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
- Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
- Porsche 970.2 Panamera Turbo V8 Executive 2014-16
- Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
Fits:
Porsche Boxster 981
Porsche Cayman 981
Porsche Boxster 982
Porsche Cayman 982
Porsche 997.2
Porsche 991.1
Porsche 991.2
Porsche 992.1
Porsche 970 Panamera
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PAF009390A
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DESCRIPTION:
A competition fully synthetic transmission oil formulated using a unique combination of improved chemistry and lower friction NANODRIVE additives to massively reduce friction vs a standard oil. The Millers Oils range of competition gear oils is fully synthetic and incorporates second generation NANODRIVE low friction technology to achieve winning results in both professional and nonprofessional racing.
APPLICATION:
Designed for the lubrication of competition gearboxes. Manual transmissions, synchromesh, non-synchromesh, sequential gearboxes, transfer gearboxes, transaxles and hypoid differentials without limited slip which require API GL4 or GL5 performance. Recommended for modern transmissions where fully synthetic oil is specified, especially for high performance road and track day applications. Hewland, Xtrac, Glebe Transmissions, ZF, Tran X, Elite Transmissions, Samsonas.
Note: Not suitable for plate type limited slip differentials, instead use CRX LS 75w90 NT+.
USER BENEFITS:
• Laboratory tests and results show up to a further 15% reduction in friction and up to a further 17% reduction in wear over the previous award winning NT range
• Exceptional cold flow properties for easier gear changes
• Fast lubrication flow to component extremes on start up
• Very good oxidation resistance and superior thermal stability
• Low friction/ low drag formulation to help reduce operating temperatures
• High film strength for maximum component protection
• Significantly reduces friction, temperature, wear and minimises power loss
• Triple ester formulation works synergistically for optimised film strength and anti-wear protection
• Second generation NANODRIVE low friction technology maximises torque and power
PERFORMANCE PROFILE:
• API GL4
• API GL5
• API MT-1
• MIL-PRF-2105E
• ZF TE-ML-02B
• ZF TE-ML-05B
• ZF TE-ML-07A
• ZF TE-ML-12B
• ZF TE-ML-16F
• ZF TE-ML-17B
• ZF TE-ML-19C
• ZF TE-ML-21B
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7966
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DESCRIPTION:
A fully synthetic transmission oil to provide maximum protection and fuel economy.
APPLICATION:
For use in car and light van manual gearboxes and axles where the ultimate performance gear oil is required.
USER BENEFITS:
• Will allow fuel economy of the vehicle to be maximised
• Provides outstanding protection against wear and corrosion
• Improves the quality of the gear change
• Resists the effects of high temperatures and heavy-duty use
• Allows extended service intervals to be used
PERFORMANCE PROFILE:
• API GL-4
• API GL-5
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