It was not a long time ago that 6-speed automatic gearboxes were a privilege largely enjoyed by top of the range models. However, in their quest for efficiency, manufacturers have quickly moved on to 7- and 8-speed boxes which trickle down the line to even the smallest models in the range (e.g. the new BMW 1-Series).
But ZF has outdone them all by launching the world’s first 9-speed automatic transmission for passenger cars in the VDI Conference “Transmissions in Vehicles 2011”. The new gearbox, code-named 9HP and designed for cars with front-transverse drive, is available in two model ranges, can handle torque between 280 and 480 Nm (206.5 – 331.9 lb-ft) and can be combined, according to each manufacturer’s requirements, with different stop-start systems, hybrid and all-wheel drive applications.
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