When rebuilding a gearbox assembly it is preferable that all the gears are replaced at the same time Interfacing old worn gears with new can lead to meshing problems and premature wear of the new gears!
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Please make sure the parts ordered are compatible with your model.
Don't forget to order all the gaskets and seals required to complete the assembly of the engine - try our pro-workshop gasket sealant 08C70K0234M to complete the job like a professional!