II.tunnel <sed. del. etc tunnelling, tunnelled brit. angl. tunneling, tunneled am. angl.>[brit. angl. ˈtʌn(ə)l, am. angl. ˈtənl]GLAG.preh. glag., nepreh. glag.
The gearbox is directly behind the engine, and a tubular propeller shaft, under the transmission tunnel, transmits the drive to a solid live rear axle.