ZF 9HP transmission

ZF 9HP
Overview
ManufacturerZF Friedrichshafen
Production2013–present
AssemblyGray Court, South Carolina, United States
Body and chassis
Class9-speed transverse automatic transmission
RelatedAisin-Toyota 8-speed · ZF 8HP
Chronology
PredecessorZF 4HP

9HP is the trademark name for the ZF Friedrichshafen 9-speed automatic transmission models (9-speed transmission with Hydraulic converter and Planetary gearsets) for transverse engine applications, designed by ZF's subsidiary in Saarbrücken and built in Gray Court, South Carolina.[1] It is used in front-wheel drive and all-wheel drive vehicles.

The 9HP is the world's first 9-speed automatic transmission for passenger cars. Land Rover and Jeep launched it at the 2013 Geneva Motor Show.[2] The 2014 Jeep Cherokee then was the first car with this transmission delivered to customers.

Gear Ratios[a]
Gear
Model
 R 1 2 3 4 5 6 7 8 9 Total
Span 		Span
Center 		Avg.
Step 		Compo-
nents
9HP 48 · 2013
9HP 28 · 2013 		−3.805 4.700 2.842 1.909 1.382 1.000 0.808 0.699 0.580 0.479 9.808 1.501 1.330 4 Gearsets
3 Brakes
3 Clutches
  1. ^ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
  1. ^ "ZF Develops 9-Speed Automatic Transmission for Passenger Cars".
  2. ^ Cite error: The named reference The Car Addict was invoked but never defined (see the help page).