| ZF 8HP | |
|---|---|
 Automatic Transmission 8HP 70 | |
| Overview | |
| Manufacturer | ZF Friedrichshafen |
| Production | 2008–present |
| Body and chassis | |
| Class | 8-speed automatic transmission |
| Related | GM 8L · Aisin-Toyota 8-speed · MB 9G-Tronic · ZF 9HP |
| Chronology | |
| Predecessor | ZF 6HP |
The ZF 8HP transmission is ZF Friedrichshafen AG's trademark name for its 8-speed automatic transmission models for longitudinal engine applications. The name is short for 8-speed transmission with hydraulic converter and planetary gearsets. Designed and first built by ZF's subsidiary in Saarbrücken, Germany, it debuted in 2008 on the BMW 7 Series (F01) 760Li sedan fitted with the V12 engine. BMW remains a major customer for the transmission.
Another major customer is Stellantis, who both received a license to produce the transmission and set up a joint-venture plant with ZF. Stellantis has built the transmission at its Kokomo Transmission plant since 2013 under their own brand name, the Torqueflite 8.[1][2] The joint venture plant in Gray Court, South Carolina opened in 2012.[3]
Gear Model
|
R | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Total Span |
Span Center |
Avg. Step |
Compo- nents |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 8HP 70 · 2008 | −3.297 | 4.696 | 3.130 | 2.104 | 1.667 | 1.285 | 1.000 | 0.839 | 0.667 | 7.043 | 1.769 | 1.322 | 4 Gearsets 2 Brakes 3 Clutches |
| 2010: 1st Generation | |||||||||||||
| 8HP 30/I · 8HP 45 | −3.295 | 4.714 | 3.143 | 2.106 | 1.667 | 1.285 | 1.000 | 0.839 | 0.667 | 7.071 | 1.773 | 1.322 | |
| 8HP 55 · 8HP 70 8HP 65 · 8HP 90 |
−3.317 | 4.714 | 3.143 | 2.106 | 1.667 | 1.285 | 1.000 | 0.839 | 0.667 | 7.071 | 1.773 | 1.322 | |
| 2014: 2nd Generation | |||||||||||||
| 8HP 75/I | −3.317 | 4.714 | 3.143 | 2.106 | 1.667 | 1.285 | 1.000 | 0.839 | 0.667 | 7.071 | 1.773 | 1.322 | |
| 8HP 30/II · 8HP 50 | −3.456 | 5.000 | 3.200 | 2.143 | 1.720 | 1.314 | 1.000 | 0.822 | 0.640 | 7.813 | 1.789 | 1.341 | |
| 8HP 75/II · 8HP 95 | −3.478 | 5.000 | 3.200 | 2.143 | 1.720 | 1.313 | 1.000 | 0.823 | 0.640 | 7.813 | 1.789 | 1.341 | |
| 2018: 3rd Generation | |||||||||||||
| 8HP 76/I | −3.478 | 5.000 | 3.200 | 2.143 | 1.720 | 1.313 | 1.000 | 0.823 | 0.640 | 7.813 | 1.789 | 1.341 | |
| 8HP 30/III · 8HP 51 | −3.712 | 5.250 | 3.360 | 2.172 | 1.720 | 1.316 | 1.000 | 0.822 | 0.640 | 8.203 | 1.833 | 1.351 | |
| 8HP 76/II · 8HP 80 | −3.993 | 5.500 | 3.520 | 2.200 | 1.720 | 1.317 | 1.000 | 0.823 | 0.640 | 8.594 | 1.876 | 1.360 | |
| 2016: Racing Cars | |||||||||||||
| 8P 45R | TBD | TBD | TBD | TBD | TBD | TBD | 1.000 | TBD | TBD | 4.200 | TBD | 1.228 | |
| 2017: Commercial Vehicles | |||||||||||||
| 8AP 600 T · 8AP 1000 T 8AP 800 T · 8AP 1200 T |
−4.250 | 4.889 | 3.123 | 2.033 | 1.639 | 1.254 | 1.000 | 0.840 | 0.639 | 7.652 | 1.767 | 1.337 | |
| 8AP 1200 S | −3.757 | 4.889 | 3.123 | 2.033 | 1.639 | 1.268 | 1.000 | 0.830 | 0.639 | 7.652 | 1.767 | 1.337 | |
- ^ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
- ^ Duane, Salerno (25 April 2019). "Reviewed: Chrysler Group's 8 speed automatic transmission". salernoduanesummit.com. Retrieved 10 May 2019.
- ^ "Ram ZF 8 Speed Automatic Transmission TorqueFlite 8 ZF 8HP70". 29 September 2014. Archived from the original on 15 December 2021. Retrieved 10 May 2019 – via YouTube.
- ^ "ZF and Chrysler Reach Agreement for new 8-Speed Automatic Transmissions". Retrieved 10 June 2010.