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
269 Articles

BROWSE CARS BY MARKET

MORE FEATURES

This '72 Skyline GT was built with goals in mind that go well beyond the typical street-driven GT-R clone.
Jofel TolosaFeb 20, 2017
Formula D Teams Up with AutoCon To Produce Car Shows for Long Beach and Irwindale Rounds
Matt UlfelderFeb 17, 2017
The Honda Civic Type R will debut at the Geneva Motor Show before entering production later this year.
Kelly PleskotFeb 17, 2017
The Ferrari 812 Superfast boasts the prancing horse brand's most powerful engine yet along with the most ridiculous name yet.
Alex NishimotoFeb 17, 2017
Jaguar has debuted two all-new engines for its XE, XF, and F-PACE lineup, giving customers a wider variety of engine options.
Jonathon KleinFeb 17, 2017
Sponsored Links

SEARCH ARTICLES BY MAKE/MODEL

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