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Gearbox Sump / Oil Pan
By OE Match
- 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 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Porsche ATF Reservoir Cap Seal – Automatic Transmission Filler Neck Seal
High-quality replacement seal for the automatic transmission fluid (ATF) reservoir cap.
This seal fits the screw cap of the transmission filler
neck, ensuring a secure and leak-free seal to maintain proper fluid containment
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 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- 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 9
Manufactured to OEM specifications, this component is essential for preventing fluid leaks, maintaining correct pressure, and ensuring reliable transmission performance.
Key Features
• Direct replacement ATF reservoir cap seal
• Designed for automatic transmission filler neck
• OEM-style fit and function
• Helps prevent fluid leaks and contamination
• Durable material for long-term performance
• Essential maintenance component
Function and Purpose
The ATF cap seal ensures a tight seal between the filler neck and cap, helping to maintain proper transmission operation.
It helps to:
• Prevent transmission fluid leaks
• Maintain system pressure and cleanliness
• Protect against dirt and contamination
• Support long-term gearbox reliability
Why Replace Your ATF Cap Seal
Over time, seals can degrade due to heat, fluid exposure, and age.
Common issues include:
• Fluid leaks around the filler cap
• Hardened or cracked seal material
• Loss of sealing performance
• Contamination risk
Replacing the seal ensures continued reliability and proper transmission function.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477321483A
The product you are viewing cross references to these numbers
- 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
Related, superseded, cross reference or alternative numbers for comparison.
477321487
The product you are viewing cross references to these numbers
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95

Fits:
Porsche 928 1983-95 Automatic transmission
Click 'Zoom in' for large parts diagram.
Diagram ref no 29
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1262711080
The product you are viewing cross references to these numbers
OEMatch Gearbox Sump / Oil Pan — Durability, Sealing, Performance
For Porsche models, OEMatch gearbox sumps and oil pans are chosen to support transmission servicing, leak repair and reliable oil management. Typical uses include routine maintenance, gearbox rebuilds and restoration work where correct fluid containment, cooling and access to drain or filter points are required.
Understanding OEMatch Gearbox Sump / Oil Pan
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original gearbox sump / oil pan. OE (Original Equipment) refers to parts matching original specifications for the gearbox sump / oil pan and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM gearbox sump / oil pan engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. The sump collects and circulates gearbox oil, provides a location for the drain plug and any filter, and helps dissipate heat from transmission fluid.
Benefits Include
- Restores secure fluid containment and reduces the risk of leaks
- Improves oil circulation and transmission cooling
- Provides correct mounting for drain plugs and any filter during servicing
Why Gearbox Sump / Oil Pan Wear and Fail
- Impact or abrasion from road debris causing dents or cracks
- Corrosion or pitting that degrades sealing faces and fastenings
- Damaged threads, worn drain plugs or failed gaskets and seals
The Importance of Replacing with OEMatch Gearbox Sump / Oil Pan
Replacing a damaged or leaking sump prevents fluid loss and overheating that can cause premature gearbox wear and impaired hydraulic operation. A correctly sealed and fitted sump supports reliable shifting and protects internal gears, bearings and seals; renewing drain hardware and gaskets during installation reduces the chance of repeat leaks.
Advantages
- Corrosion-resistant materials and robust construction
- Precision sealing surfaces to reduce leak risk
- Fits original mounting points and clearances for easy installation
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new sealing hardware where specified and check for leaks after initial running.