Abstract: A torque converting linkage (10) comprising two turbines, an impeller and a reactor (12 & 14), which rotate on shafts (16 & 18) within separate fluid-filled housings (20 & 22) is disclosed. Each housing (20 & 22) includes an outlet port and an inlet port (24 & 30, 28 & 26) which are coupled by two conduits (32 & 34). An external torque applied to shaft (16) turns the impeller turbine (12). Vanes (38) on the impeller turbine (12) force the fluid (36) out of the impeller housing (20) through a first conduit (34) into the reactor housing (22). The fluid (36) entering the reactor housing (22) acts on the vanes (38) of the reactor turbine (14), causing it to rotate and to transfer rotational energy to shaft (18).