ZF Ecomat

The ZF Ecomat automotive transmission was specifically designed by ZF Friedrichshafen AG primarily for city-buses and motorcoaches. It has several generations - all of the automatic transmission type, and many variants. The latest variants utilise a lock-up torque converter along with a retarder. Some variants are listed below.

All of these original Ecomat variants are no longer in production.

All four-speed variants (4HP-502, 4HP-592, 4HP-602) are discontinued. The five- and six-speed variants remain in production

In addition to its use in road vehicles, the Ecomat transmission is also employed in the Class 172 lightweight diesel multiple unit (DMU) trains in service with various operators in Great Britain,in major refurbishments of ČD Class 842 in the Czech Republic and CAF built C4K in Northern Ireland.