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Side Cover Plate
By OE Match
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OEMatch Side Cover Plate — Fit, Function, Confidence
Side cover plates seal and protect the outer case of a Porsche gearbox, retaining lubrication, supporting bearings and preserving alignment. They are used across Porsche 911, Boxster and Cayman transmissions and are important during rebuilds or repairs where sealing, pressure retention and structural integrity are required to maintain reliable drivetrain operation for Porsche models.
Available Types- High-strength aluminium plates for lightweight construction and good thermal conductivity
- Steel-alloy plates for enhanced rigidity where additional strength is required
- Replacement gaskets, seals and fasteners matched to the plate design
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original side cover plate.
OE (Original Equipment) refers to parts matching original specifications for the side cover plate and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM side cover plate engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Side cover plates act as a closure for the transmission housing, forming a sealed boundary that helps retain oil, protect bearings and maintain shaft and selector alignment. They are commonly machined from aluminium or steel alloys and include precision sealing faces and mounting points so that gaskets and fasteners can preserve gearbox pressure and keep debris out of internal components.
Benefits Include- Prevents oil leaks and contamination to protect internal gearbox components
- Maintains bearing and shaft alignment for consistent selector operation
- Adds structural support to the gearbox housing, improving resistance to pressure and thermal cycles
- Thermal cycling and prolonged heat exposure causing warping or cracking of the plate
- Corrosion or pitting on sealing surfaces from moisture or contaminated oil
- Worn or damaged gaskets and loose or corroded fasteners leading to oil leakage
Replacing a compromised side cover plate restores proper oil retention and sealing, prevents contamination and stops progressive bearing or shaft wear. During a gearbox rebuild, fitting a correctly formed plate with new seals and correctly torqued fasteners helps to re-establish alignment and reduces the risk of further internal damage. Choosing a plate matched to Porsche transmission dimensions supports consistent operation and serviceability.
Advantages- Material options to suit application: aluminium for weight and heat handling, steel for added rigidity
- Designed as direct-fit replacements made to original-spec dimensions and tolerances for Porsche models
- Suitable for restoration, rebuilds and routine maintenance on classic and modern Porsche gearboxes
Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified. If you are unsure about setup, bearing backlash settings, consult a specialist with Porsche experience.
