Super Street Network

 |   |   |  Land Rover Demonstrates World's First 9-Speed Auto Transmission - Web Exclusive
Subscribe to the Free
Newsletter

Land Rover Demonstrates World's First 9-Speed Auto Transmission - Web Exclusive

Ezekiel Wheeler
Feb 27, 2013
Epcp 1212 01+land rover+9 speed auto transmission Photo 1/1   |   Land Rover Demonstrates World's First 9-Speed Auto Transmission - Web Exclusive

While a six-speed manual is considered ample for any occasion, automatic transmissions are sprouting extra cogs like new spots on a child with chickenpox. The seven-speed auto seemed excessive and the eight-speed almost redundant, and yet the ZF 8HP, as use by several manufacturers including BMW and Jaguar Land Rover has proved that any concerns about constant hunting for gears or slow kick-down response were unfounded.

Buoyed by the successful applications, Land Rover has announced it will demonstrate the world's first nine-speed automatic at the 2013 Geneva Auto Show.

The ZF 9HP transmission, a first for a passenger car, has been designed for transverse applications. With Land Rover as the lead partner with ZF on the project, the aim is to reduce emissions and improve efficiency.

The smaller step between each ratio should help with response times during acceleration, and improved refinement by virtue of smoother shifting and lower engine speeds when cruising.

It's claimed that first gear in the 9HP is lower than the existing six-speed transmission. What's more, it's designed for off-road, towing and on-road use so has been built robust to ensure all-terrain ability.

Another detail is that the existing six-speed auto transmission downshifts sequentially, whereas the 9HP is able to "skip-shift" for faster downshifts to match rapid deceleration.

The torque converter houses a multi-stage damper for smoother departure and improved refinement. It also boasts adaptive shifting to interpret the driver's inputs.

Despite the extra three gears, the 9HP is only 0.24" (6mm) longer and actually weighs 16.5 lb (7.5kg) less than the outgoing six-speed transmission. The new nine-speed transmission will be produced at ZF's facility in South Carolina, USA.

By Ezekiel Wheeler
271 Articles

BROWSE CARS BY MARKET

MORE FEATURES

Preview the February 2019 edition of Super Street - our Calendar Issue - featuring an EK9 Civic Type R, 900hp JZA80 Supra RZ, the new Toyo Girls, and more!
Dec 13, 2018
Dubbed “Racing Through the Ages,” this collection of six special 570S MSO coupes and spiders pays homage to McLaren's racing heritage
Ed TahaneyDec 13, 2018
The tastefully executed exterior, sweet plaid upholstery, and an E30 M3 inline-six make this an almost perfect build
Ed TahaneyDec 12, 2018
With the sixth generation of the BMW 3 Series arriving in March, the incoming 330i is roomier, quicker, more adept, and a sharper performer.
ManufacturerDec 12, 2018
The $3.2 million Aston Martin Valkyrie will get a naturally aspirated 6.5-liter V-12 that makes 1,000 hp at 11,100 rpm
Alex NishimotoDec 12, 2018
Sponsored Links

SEARCH ARTICLES BY MAKE/MODEL

Search
CLOSE X
BUYER'S GUIDE
SEE THE ALL NEW
NEWS, REVIEWS & SPECS
TO TOP