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Gearbox Overdrive D-type Volvo 1800 (B18)

An oil leak at the rear edge of the gearbox, an overdrive that won't engage or that jumps out under load – these are the classic symptoms when a Laycock D-type on a B18-powered 1800 starts to get tired. This category gathers the wear and sealing parts that belong to the overdrive itself, so that engagement pressure and hydraulics can be restored without having to replace the whole unit.

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The group includes gaskets and O-rings to stop oil leaks, washers, screw and nut for correct tightening during assembly, plus bushings, balls and a release bearing that belong to the moving parts. During a rebuild, O-rings and gaskets are typical inspection points, since worn seals lower the oil pressure and make engagement weak or delayed.

The parts cover the B18-era 1800 with D-type overdrive. Always check which type of overdrive your car has before ordering, since the mounting details differ between versions.

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