Aisin–Toyota 8-speed automatic transmission
| AA 80E/F · AE 80E/F · AL 80E/F TR-80SD · TR-81SD · TR-82SD AW F8 F35 · AW F8 F45 | |
|---|---|
Cutaway of an AW F8 F35 | |
| Overview | |
| Manufacturer | Toyota · Aisin AW |
| Also called | BMW/Mini GA 8F 22AW Volvo TG-81SC/SD GM AW F8 F45 & AF50-8 VW AQ 450 PSA EAT8 |
| Production | 2006–present |
| Body and chassis | |
| Class | 8-speed automatic transmission |
| Related | ZF 8HP · GM 8L · ZF 9HP |
| Chronology | |
| Predecessor | AWTF-80 SC transmission |
Aisin and Toyota offer various 8-speed automatic transmissions for use in both longitudinal and transverse engine vehicles, based on a common, globally patented gearset concept.
The Aisin TL-80SN (Toyota AA 80E/AA 80F/AA 81E) series is the world's first 8-speed automatic transmission for passenger cars. It is designed for longitudinal engines and was first used in the 2007 model year Lexus LS 460.
Beginning with the AW F8 transmission Aisin and Toyota derived a transverse engine variant by adapting this globally patented gearset concept to fit into the same space as the previous generation U6xx Lepelletier gear mechanism-based 6-speed transmissions to increase the overall ratio spread, reduce gear steps, and increase the torque capacity for transverse engine vehicles as well.
The Aisin AW F8 F45 (Toyota UA 80E/UA 80F) series is the world's first 8-speed automatic transmission designed for use in transverse engine applications. It is also called EAT8 (PSA), GA 8F 22AW (BMW/Mini), TG-81SC (Volvo), AF50-8 (Opel/Vauxhall), AW F8 F45 (Cadillac), and AQ 450 (Volkswagen Group). First usage was in the 2013 model year Lexus RX 350 F Sport.
Toyota’s marketing name for the transmission is "Direct Shift – 8AT 8-speed automatic transmission". In contrast to the UB 80E/F transmission, which was developed by Aisin AW for Toyota, the UA 80E/F was developed in a joint venture between Toyota and Aisin AW. Due to its worldwide application, development was carried out in a global manner involving R&D resources in Japan and the US. The Aisin AW F8 F35 (Toyota UB 80E/F) transmissions are used for lower torque applications, such as 4-cylinder engines, and rated for 300 N⋅m (221 lb⋅ft).
| Aisin | Toyota | Gear Year |
R2 | R1 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Total Span |
Span Center |
Avg. Step |
Compo- nents |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Longitudinal engines | 3 Gearsets 2 Brakes 4 Clutches | |||||||||||||||
| TL-80SN | AA 80E/F | 2006 | −2.176 | −4.056 | 4.597 | 2.724 | 1.864 | 1.464 | 1.231 | 1.000 | 0.824 | 0.685 | 6.709 | 1.775 | 1.312 | |
| — | AB 80E/F | 2015 | −2.053 | −3.786 | 4.796 | 2.811 | 1.844 | 1.429 | 1.214 | 1.000 | 0.818 | 0.672 | 7.132 | 1.796 | 1.324 | |
| TR-80SD | AE 80E/F | 2010 | −2.053 | −3.825 | 4.845 | 2.8404 | 1.864 | 1.4369 | 1.217 | 1.000 | 0.816 | 0.672 | 7.206 | 1.805 | 1.326 | |
| TR-81SD | — | 2010 | −2.182 | −4.066 | 4.970 | 2.8398 | 1.864 | 1.4370 | 1.210 | 1.000 | 0.825 | 0.686 | 7.247 | 1.846 | 1.327 | |
| TR-82SD | — | 2010 | −2.182 | −4.024 | 4.919 | 2.811 | 1.844 | 1.429 | 1.207 | 1.000 | 0.827 | 0.686 | 7.173 | 1.836 | 1.325 | |
| — | AL 80E/F | 2023 | −1.870 | −3.646 | 4.413 | 2.808 | 1.950 | 1.511 | 1.274 | 1.000 | 0.793 | 0.652 | 6.774 | 1.696 | 1.314 | |
| Transverse engines | ||||||||||||||||
| AW F8 F45 | UA 80E/F | 2016 | −2.059 | −4.221 | 5.519 | 3.184 | 2.050 | 1.492 | 1.235 | 1.000 | 0.801 | 0.673 | 8.200 | 1.927 | 1.351 | |
| AW F8 F35 | UB 80E/F | 2017 | −2.059 | −4.015 | 5.250 | 3.029 | 1.950 | 1.457 | 1.221 | 1.000 | 0.809 | 0.673 | 7.800 | 1.880 | 1.341 | |
| TG-80LS | UB 80E/F | 2017 | −2.053 | −4.003 | 5.070 | 2.972 | 1.950 | 1.4698 | 1.231 | 1.000 | 0.808 | 0.672 | 7.540 | 1.846 | 1.335 | |
| TBD | TBD | TBD | −2.182 | −4.255 | 5.200 | 2.971 | 1.950 | 1.4700 | 1.224 | 1.000 | 0.817 | 0.686 | 7.583 | 1.888 | 1.336 | |
- 1 2 3 4 See also Toyota A transmission
- 1 2 3 4 5 See also Toyota U transmission
- ↑ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
- ↑ Logically, the gearset concept (layout) provides for this 2nd reverse gear, but it will most likely not be used in the transmissions that the car manufacturers eventually bring to market. In some data sheets, the gear ratio of R2 is given, presumably a careless error