Complex sentence: Issigonis's Mini and a few successor cars had the engine transversely mounted (east-west), with the transmission in the sump below the crankshaft, with power transmitted by transfer gears.
Split into simpler sentences: Issigonis's Mini and a few successor cars had the engine transversely mounted (the engine's crankshaft axis is perpendicular to the long axis of the car). The transmission is located in the sump below the crankshaft, with power transmitted by transfer gears.