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.
ZF 8HP | |
---|---|
Overview | |
Manufacturer | ZF Friedrichshafen |
Production | 2008–present |
Body and chassis | |
Class | 8-speed automatic transmission |
Related | GM 8L transmission |
Chronology | |
Predecessor | ZF 6HP 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 2017.[3]
Specifications edit
Layout edit
One of the main aims of the ZF 8HP transmission is to improve vehicle fuel economy with extra speeds. Compared to the six-speed ZF 6HP transmission it uses 12% less fuel, and 14% less than a 5-speed transmission.[4][5] Due to changes in internal design, the shift times have reduced to 200 milliseconds; additionally, the unit brings the ability to shift in a non-sequential manner – going from gear 8 to gear 2 in extreme situations.[6] In the 8HP70 version, it has a torque handling limit of 700 N⋅m (516 lb⋅ft), and weighs 87 kg (192 lb).[7]
First generation 8HP products were released starting in 2010. In addition to the rear-wheel drive variant, two different four-wheel drive versions were available, with a version destined for Volkswagen Group applications using a Torsen centre differential.[8] It is able to encompass a torque range from 300 N⋅m (221 lb⋅ft) to 1,000 N⋅m (738 lb⋅ft), and is available for use in middle-class cars through to large luxury sport utility vehicles.[8]
Second generation 8HP products were released starting in 2014. Efficiency improvements over the original design and the first generation include a wider ratio spread of 7.8:1, reduced drag torque from the shift elements, reduction in required oil pump pressure, and broadened use of the coasting and start-stop systems.[9] ZF estimated fuel economy improvement over first generation 8HP kits to be 3%. Refinements were also made with respect to vibration.
Third generation 8HP products were released starting in 2018. Major improvements are total spread of 8.6 and a fuel economy improvement of 2.5% compared to the second generation. There are several options in maximum torque available, also the gearbox is available with mild hybrid and plug in hybrid options: With 15 kW and 200 Nm supporting boosting and recuperation in combination with 48 Volt technology up to 90 kW and 250 NM for usage with higher voltage.[10]
Gear teeth and ratios | Planetary Gearset: Teeth[b] | Count | Total | Avg. | |||||
---|---|---|---|---|---|---|---|---|---|
Model | Version First delivery |
[c] [d] |
[e] [f] |
[g] [h] |
[i] [j] |
Brakes Clutches |
Ratio span |
Gear step | |
Gear | R | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Step |
–R : 1 | 1 : 2 | 2 : 3 | 3 : 4 | 4 : 5 | 5 : 6 | 6 : 7 | 7 : 8 | |
8HP 70[k] | 700 N⋅m (516 lb⋅ft) · 2008 | 48[11] 96 |
48[11] 96 |
69[12] 111 |
23[12] 85 |
2 3 |
7.0435 | 1.3216 | |
Ratio |
−3.2968 |
4.6957 |
3.1304 |
2.1039 |
1.6667 |
1.2845 |
1.0000 |
0.8392 |
0.6667 |
Step | 0.7021 | 1.5000 | 1.4879 | 1.2623 | 1.2975 | 1.2845 | 1.1917 | 1.2587 | |
1st Generation | |||||||||
8HP 30/I 8HP 45 |
300 N⋅m (221 lb⋅ft) · 2010 450 N⋅m (332 lb⋅ft) · 2010 |
48 96 |
48 96 |
60 96 |
28 104 |
2 3 |
7.0714 | 1.3224 | |
Ratio |
−3.2952 |
4.7143 |
3.1429 |
2.1064 |
1.6667 |
1.2854 |
1.0000 |
0.8387 |
0.6667 |
Step | 0.6990 | 1.5000 | 1.4921 | 1.2638 | 1.2966 | 1.2854 | 1.1923 | 1.2581 | |
8HP 55 8HP 65 8HP 70 8HP 90 |
650 N⋅m (479 lb⋅ft) · 2010 650 N⋅m (479 lb⋅ft) · 2010 700 N⋅m (516 lb⋅ft) · 2010 900 N⋅m (664 lb⋅ft) · 2010 |
48 [11][13] 96 |
48 [11][13] 96 |
69 111 |
28 104 |
2 3 |
7.0714 | 1.3224 | |
Ratio |
−3.3168 |
4.7143 |
3.1429 |
2.1064 |
1.6667 |
1.2847 |
1.0000 |
0.8392 |
0.6667 |
Step | 0.7036 | 1.5000 | 1.4921 | 1.2638 | 1.2973 | 1.2847 | 1.1917 | 1.2587 | |
2nd Generation | |||||||||
8HP 75/I[14] | 740 N⋅m (546 lb⋅ft) · 2014 | 48 96 |
48 96 |
69 111 |
28 104 |
2 3 |
7.0714 | 1.3224 | |
Ratio | −3.3168 | 4.7143 | 3.1429 | 2.1064 | 1.6667 | 1.2847 | 1.0000 | 0.8392 | 0.6667 |
Step | 0.7036 | 1.5000 | 1.4921 | 1.2638 | 1.2973 | 1.2847 | 1.1917 | 1.2588 | |
8HP 30/II[14] 8HP 50[14] |
300 N⋅m (221 lb⋅ft) · 2014 500 N⋅m (369 lb⋅ft) · 2014 |
48 96 |
54 96 |
60 96 |
24 96 |
2 3 |
7.8125 | 1.3413 | |
Ratio |
−3.4560 |
5.0000 |
3.2000 |
2.1429 |
1.7200 |
1.3139 |
1.0000 |
0.8221 |
0.6400 |
Step | 0.6912 | 1.5625 | 1.4933 | 1.2458 | 1.3091 | 1.3139 | 1.2163 | 1.2846 | |
8HP 75/II[14] 8HP 95[l] |
740 N⋅m (546 lb⋅ft) · 2014 900 N⋅m (664 lb⋅ft) · 2014 |
48 96 |
54 96 |
69 111 |
24 96 |
2 3 |
7.8125 | 1.3413 | |
Ratio |
−3.4783 |
5.0000 |
3.2000 |
2.1429 |
1.7200 |
1.3131 |
1.0000 |
0.8226 |
0.6400 |
Step | 0.6956 | 1.5625 | 1.4933 | 1.2458 | 1.3098 | 1.3131 | 1.2156 | 1.2853 | |
3rd Generation | |||||||||
8HP 76/I[m] | 760 N⋅m (561 lb⋅ft) · 2018 | 48 96 |
54 96 |
69 111 |
24 96 |
2 3 |
7.8125 | 1.3413 | |
Ratio | −3.4783 | 5.0000 | 3.2000 | 2.1429 | 1.7200 | 1.3131 | 1.0000 | 0.8226 | 0.6400 |
Step | 0.6956 | 1.5625 | 1.4933 | 1.2458 | 1.3098 | 1.3131 | 1.2156 | 1.2853 | |
8HP 30/III[n] 8HP 51[o] |
300 N⋅m (221 lb⋅ft) · 2018 500 N⋅m (369 lb⋅ft) · 2018 |
48 96 |
54 96 |
60 96 |
24 102 |
2 3 |
8.2031 | 1.3507 | |
Ratio |
−3.7120 |
5.2500 |
3.3600 |
2.1724 |
1.7200 |
1.3161 |
1.0000 |
0.8221 |
0.6400 |
Step | 0.7070 | 1.5625 | 1.5467 | 1.2630 | 1.3069 | 1.3161 | 1.2163 | 1.2846 | |
8HP 76/II[p] 8HP 80[q] |
760 N⋅m (561 lb⋅ft) · 2018 800 N⋅m (590 lb⋅ft) · 2018 |
48 96 |
54 96 |
69 111 |
24 108 |
2 3 |
8.5938 | 1.3597 | |
Ratio |
−3.9930 |
5.5000 |
3.5200 |
2.2000 |
1.7200 |
1.3172 |
1.0000 |
0.8226 |
0.6400 |
Step | 0.7260 | 1.5625 | 1.6000 | 1.2791 | 1.3058 | 1.3172 | 1.2156 | 1.2853 | |
Racing Cars | |||||||||
8P 45R[r] | 450 N⋅m (332 lb⋅ft) · 2016 up to 1,050 N⋅m (774 lb⋅ft)[20] |
TBD | TBD | 60 96 |
TBD | 2 3 |
4.2000 | 1.2275 | |
Ratio | TBD | TBD | TBD | TBD | TBD | TBD | 1.0000 | TBD | TBD |
Step | TBD | TBD | TBD | TBD | TBD | TBD | TBD | TBD | |
Commercial Vehicles[s] | |||||||||
8AP 600 T[t] 8AP 800 T 8AP 1000 T 8AP 1200 T |
600 N⋅m (443 lb⋅ft) · 2017 800 N⋅m (590 lb⋅ft) · 2017 1,000 N⋅m (738 lb⋅ft) · 2017 1,200 N⋅m (885 lb⋅ft) · 2017[u] |
65[v] 115 |
65[v] 115 |
62 122 |
27 105 |
2 3 |
7.6522 | 1.3374 | |
Ratio |
−4.2501 |
4.8889 |
3.1235 |
2.0334 |
1.6389 |
1.2541 |
1.0000 |
0.8400 |
0.6389 |
Step | 0.8693 | 1.5652 | 1.5361 | 1.2407 | 1.3068 | 1.2541 | 1.1905 | 1.3148 | |
8AP 1200 S [w] |
1,200 N⋅m (885 lb⋅ft) · 2017[u] | 65[v] 115 |
65[v] 115 |
65[v] 115 |
27<br105 | 2 3 |
7.6522 | 1.3374 | |
Ratio |
−3.7569 |
4.8889 |
3.1235 |
2.0334 |
1.6389 |
1.2676 |
1.0000 |
0.8305 |
0.6389 |
Step | 0.7685 | 1.5652 | 1.5361 | 1.2407 | 1.2929 | 1.2676 | 1.2041 | 1.2999 | |
Ratio R & even |
|||||||||
Ratio odd |
- ^ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
- ^ Layout
(1) Planetary gearset 1 is on the input (turbine) side
(2) Output shaft is carrier 4 (planetary gear carrier of gearset 4) - ^ Sun 1: sun gear of gearset 1
- ^ Ring 1: ring gear of gearset 1
- ^ Sun 2: sun gear of gearset 2
- ^ Ring 2: ring gear of gearset 2
- ^ Sun 3: sun gear of gearset 3
- ^ Ring 3: ring gear of gearset 3
- ^ Sun 4: sun gear of gearset 4
- ^ Ring 4: ring gear of gearset 4
- ^ without generation designation
- ^ Der neue BMW M760 Li xDrive · BMW Medieninformation Deutschland (The new BMW M760 Li xDrive · BMW Media Information Germany) · 02/2016 · p. 23 · and Der neue BMW M760 Li xDrive · Technische Daten · BMW Medieninformation Oesterreich (The new BMW M760 Li xDrive · Technical Specifications · BMW Media Information Austria) · 01/2017 · p. 2 · 800 N⋅m (590 lb⋅ft)[15][14]
- ^ narrow total ratio span · preferebly for petrol engines, sports cars, and high performance engines · Alpina B3 Saloon AWD · Technical Data · 730 N⋅m (538 lb⋅ft)[16][14]
- ^ Technical specifications · The new BMW 3 Series Sedan · BMW Media Information · 03/2019 · p. 2: BMW 320i Sedan · 300 N⋅m (221 lb⋅ft)[17][14]
- ^ loc. cit. · p. 10: BMW M340i xDrive Sedan · 500 N⋅m (369 lb⋅ft)[17][14]
- ^ wide total ratio span · preferebly for Diesel engines, offroad cars, and low performance engines · loc. cit. · p. 18: BMW 330d Sedan · 580 N⋅m (428 lb⋅ft)[17][14] and Alpina D3 S Saloon AWD · Technical Data · 730 N⋅m (538 lb⋅ft)[18]
- ^ wide total ratio span · preferebly for Diesel engines, offroad cars, and low performance engines · Alpina XB7 AWD · Technical Data · 800 N⋅m (590 lb⋅ft)[19]
- ^ w/o hydraulic torque converter · narrow total ratio span of 4.2[20]
- ^ based on the same gearset concept as the 8HP transmissions[21][22]
- ^ Automatic Powershift Transmission for Trucks[23]
- ^ a b higher torque on demand[24]
- ^ a b c d e 65/115 or 52/92[24][25]
- ^ Automatic Powershift Transmission for Special vehicles[25][26]
Variants and Applications edit
- ^ without any claim of completeness
See also edit
References edit
- ^ 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.
- ^ "Fuel saving and minimizing CO2 emissions". ZF Friedrichshafen AG. Archived from the original on 19 July 2009. Retrieved 18 September 2009.
- ^ Mike, Hanon (4 May 2007). "ZF Develops 8-Sped automatic". Gizmag.
- ^ "Maximum driving enjoyment with maximum agility". ZF Friedrichshafen AG. Retrieved 18 September 2009.
- ^ "8-Speed Automatic Transmission". ZF Friedrichshafen AG. Retrieved 19 September 2016.
- ^ a b "The freedom to exceed limits" (PDF). brainfunkers.co. ZF Friedrichshafen AG. Retrieved 7 January 2020.
- ^ "ZF showcasing second-generation 8HP 8-speed transmission at NAIAS; additional 3% boost in fuel savings". Green Car Congress. Retrieved 13 July 2015.
- ^ "Transmission technology from ZF" (PDF). ZF.com. Retrieved 20 February 2018.
- ^ a b c d 8HP 70 Repair Manual · Picture 10106 p. 110 · Saarbruecken 2014 · https://avtgr.ru/upload/data/pdf/zf_instructions/8HP70.pdf
- ^ a b "Timur Apakidze · Saturation Dive: ZF 8-Speed Automatic". TTAC: The Truth About Cars. 11 March 2014. Retrieved 7 July 2019.
- ^ a b 8HP 55A Repair Manual · Picture 10106 p. 169 · Saarbruecken 2014 · https://avtgr.ru/upload/data/pdf/zf_instructions/8HP55A.pdf
- ^ a b c d e f g h i 2nd Generation and 3rd Generation "Efficient And Dynamic · ZF Gearbox Brochure" (PDF). 1 September 2017. Retrieved 7 July 2019.
- ^ https://www.press.bmwgroup.com/austria/article/attachment/T0267754DE/378234
- ^ "Technical Data: ALPINA Automobiles".
- ^ a b c "Specifications of the all-new BMW 3 Series Sedan, valid from 03/2019".
- ^ "Technical Data: ALPINA Automobiles".
- ^ "Technical Data: ALPINA Automobiles".
- ^ a b https://www.zf.com/products/media/zf_race_engineering/motorsports/downloads_2/ZF_RE_Factsheet_Motorsport-Transmissions_EN_001508000203.pdf
- ^ https://www.zf.com/products/en/special_vehicles/products_64421.html
- ^ https://www.zf.com/public/org/PowerLineFlyer_NorthAmerica_web_91412.pdf
- ^ https://www.zf.com/master/media/products_1/commercial_vehicles/footer_1/brochures_trucks_buses/2020_3/TT_Product_Overview_DE_EN_LowRes.pdf · p. 7
- ^ a b https://www.zf.com/public/org/Data-sheet_PowerLine_71773.pdf
- ^ a b Efficient Torque Converter Automatic Transmission for Commercial Vehicles (ZF 8AP) · Winfried Gründler · Herbert Mozer · Frank Sauter: ATZ worldwide 06/2017 · pp. 36–39
- ^ https://www.zf.com/public/org/Flyer_PowerLine-Special-Vehicles_en_72128.pdf
- ^ "Volkswagen Amarok With 8-Speed Automatic Transmission" (PDF). Retrieved 9 November 2015.
- ^ "New Eight Speed Transmission Introduced by Chrysler". Retrieved 2 September 2011.
- ^ "America's First Luxury Sedan With Eight-speed Automatic Transmission". Retrieved 5 September 2011.
- ^ "2012 Chrysler Fleet Buying Guide" (PDF). Retrieved 21 July 2011.
- ^ a b c d e "SEC filing reveals new V6 and 8-speed transmission for Ram". Retrieved 9 March 2012.
- ^ a b c d e "2014 Dodge Durango Bows With Eight-Speed". Retrieved 28 March 2013.
- ^ a b c "2013 Ram 1500 Unveiled With Eight-Speed". Retrieved 5 April 2012.
- ^ a b c "ZF to Supply 8-Speed Automatic Transmission to new 2013 Ram 1500 Pick-up Truck". ZF Friedrichshafen AG. Retrieved 20 April 2012.
- ^ a b c "2013 Ram 1500 Crew Cab SLT 4x4 [w/video]". Autoblog.com. Retrieved 25 August 2012.
- ^ Audi. "Audi 8-speed to replace 6-speed automatic across most of range". Motor1.com. Retrieved 4 February 2020.
- ^ a b c d "Getriebekatalog Abfrage – Technische Daten –" (PDF). zfservis.sk. Retrieved 21 August 2021.
- ^ a b "Aston Martin Automatic Gearboxes". JT Automatics Ltd. Archived from the original on 25 April 2016.
- ^ "On Tour With More Comfort ZF Delivers 8-Speed Automatic Transmission for New Iveco Daily". Retrieved 16 November 2014.
- ^ "2014 Maserati Quattroporte [w/video]". Retrieved 12 December 2012.
- ^ "RR ghost specification". Retrieved 21 February 2010.
- ^ "New Generation of the 8HP in the BMW 5 Series". Retrieved 20 August 2014.
- ^ a b 8HP 75 Data Sheet · p. 4 · Saarbruecken 2016
- ^ "2016 BMW 7 Series Sedan: Teutonic Technology". 24 September 2015. Retrieved 24 April 2016.
- ^ "BMW Model Year Actions – July and August 2014". Retrieved 24 April 2016.
- ^ "Compare The Jeep® Vehicle Lineup With Detailed Specs – Jeep®". jeep.com. Retrieved 10 May 2019.
- ^ "New vehicles with ZF technology". Retrieved 18 June 2011.
- ^ "New vehicles with ZF technology". Retrieved 18 June 2011.
- ^ "BMW ALPINA B7 Long-wheelbase AWD Technical Data". Retrieved 10 May 2019.