The Holden EH is an automobile produced by General Motors-Holden in Australia from 1963 to 1965. The EH was released in August 1963 replacing the Holden EJ series and was the first Holden to incorporate the new “Red” engine, with a 7 main bearing crankshaft instead of the 4 main bearing crankshaft used in the “Grey” engine. A larger capacity 149 ci (2400cc) engine was first only sold attached to a three-speed manual gearbox or the “Hydramatic” 4 stage automatic transmission with a (column shift). The Controlled Coupling Hydramatic used in the EH was actually a four-stage although it effectively worked as a three-speed unit except at full throttle.[2] The 179 ci (2900cc) engine was initially only sold with the “Hydramatic”. The first EH with a 179 ci engine and a manual gear box was called the “EH-S4”, fitted with an up-graded manual gearbox, with stronger gears than the 149ci gearbox and an upgraded clutch. The three-speed manual (column shift) gearboxes had no synchromesh on first gear and only synchromesh on the second and third ‘top gear’
A total of 256,959 EH Holdens were produced and sold from 1963 to 1965, when the EH was replaced by the Holden HD series. Info – Wikepedia