Awf8F35

The Aisin AW F8FXX series is the world's first 8-speed automatic transmission designed for use in transverse engine applications.

Aisin designed the transmission to package in the same space as preceding 6-speed designs, while increasing the total gear spread and reducing gear spacing. It is also called the EAT8 (PSA), GA8F22AW (BMW & Mini), TG-81SC (Volvo), AF50-8 (Opel/Vauxhall), AWF8F45 (Cadillac), and AQ450 (Volkswagen Group). First usage was in the 2013 model year Lexus RX350 F Sport.

AWF8F35/45
Awf8F35
Cutaway of an AWF8F35
Overview
ManufacturerAisin AW
Also calledBMW & Mini GA8F22AW
Toyota UA80E/UA80F
Volvo TG-81SC/SD
GM AWF8F45 & AF50-8
VW AQ450
PSA EAT8
Production2013–present
Body and chassis
Class8-speed transverse automatic transmission
RelatedZF 8HP · ZF 9HP
Chronology
PredecessorAWTF-80 SC transmission

Specifications

Gearset 1 is not an ordinary gearset but a reverse one. It employs two planetary gears which mesh with each other. One of these planets meshes with the sun gear, the other planet meshes with the ring gear. This results in different ratios being generated by the planetary and also causes the sun gear to rotate in the same direction as the ring gear when the planet carrier is the stationary.

This made it possible to manage with three wheel sets. As a result, the transmission is more compact than eight-speed transmissions for conventional drives. This meant that an eight-speed automatic transmission was also possible for transverse engines. The same gearset concept was first used by Lexus in 2007 and was the very first eight-speed automatic transmission for passenger cars on the world market.

Gear Teeth and Ratios Planetary Gearset: Teeth Count Total Avg. Drive-
train
Simple Ravigneaux
Model
Type
First Delivery
Max. Input Torque
Awf8F35 
Awf8F35 
Awf8F35 
Awf8F35 
Awf8F35 
Awf8F35 
Brakes
Clutches
Ratio
Span
Gear
Step
Final
Drive
Gear Awf8F35  R1 R2 1 2 3 4 5 6 7 8
Step
Awf8F35 
–R1 : 1 –R2 : 2 1 : 2 2 : 3 3 : 4 4 : 5 5 : 6 6 : 7 7 : 8
AA 80E
Lexus
480 N⋅m (354 lb⋅ft) · 2007 38
82
30
34
34
74
2
4
6.7091 1.3125
Ratio
Awf8F35 
−4.0561
Awf8F35 
−2.1765
Awf8F35 
4.5970
Awf8F35 
2.7241
Awf8F35 
1.8636
Awf8F35 
1.4642
Awf8F35 
1.2313
Awf8F35 
1.0000
Awf8F35 
0.8245
Awf8F35 
0.6852
Awf8F35 
Step 0.8824 0.7990 1.6875 1.4617 1.2728 1.1891 1.2313 1.2129 1.2033
AA 80E 38
83
30
38
38
78
2
4
7.1252 1.3240
Ratio
Awf8F35 
−3.7860
Awf8F35 
−2.0526
Awf8F35 
4.7956
Awf8F35 
2.8112
Awf8F35 
1.8444
Awf8F35 
1.4294
Awf8F35 
1.2137
Awf8F35 
1.0000
Awf8F35 
0.8176
Awf8F35 
0.6724
Awf8F35 
Step 0.7895 0.7302 1.7059 1.5241 1.2904 1.1777 1.2137 1.2230 1.2160
AW F8F35
AW F8F45
350 N⋅m (258 lb⋅ft) · 2013
480 N⋅m (354 lb⋅ft) · 2013
38
78
36
44
44
96
2
4
7.5833 1.3357
Ratio
Awf8F35 
−4.2545
Awf8F35 
−2.1818
Awf8F35 
5.2000
Awf8F35 
2.9714
Awf8F35 
1.9500
Awf8F35 
1.4700
Awf8F35 
1.2235
Awf8F35 
1.0000
Awf8F35 
0.8175
Awf8F35 
0.6857
Awf8F35 
4.398
Step 0.8181 0.7343 1.7500 1.5238 1.3266 1.2014 1.2235 1.2233 1.1921
AW F8F45 480 N⋅m (354 lb⋅ft)
2013
38
78
26
34
34
70
2
4
7.8000 1.3410
Ratio
Awf8F35 
−4.0147
Awf8F35 
−2.0588
Awf8F35 
5.2500
Awf8F35 
3.0288
Awf8F35 
1.9500
Awf8F35 
1.4570
Awf8F35 
1.2209
Awf8F35 
1.0000
Awf8F35 
0.8086
Awf8F35 
0.6731
Awf8F35 
3.075
3.200
Step 0.7647 0.6797 1.7333 1.5533 1.3384 1.1933 1.2209 1.2366 1.2014
AW F8F35 350 N⋅m (258 lb⋅ft)
2013
42
82
26
34
34
70
2
4
8.2000 1.3507
Ratio
Awf8F35 
−4.2206
Awf8F35 
−2.0588
Awf8F35 
5.5192
Awf8F35 
3.1842
Awf8F35 
2.0500
Awf8F35 
1.4920
Awf8F35 
1.2349
Awf8F35 
1.0000
Awf8F35 
0.8008
Awf8F35 
0.6731
Awf8F35 
2.561
Step 0.7647 0.6466 1.7333 1.5533 1.3740 1.2082 1.2349 1.2488 1.1897
Ratio
R & even
Awf8F35  Awf8F35  Awf8F35  Awf8F35  Awf8F35 
Ratio
R & odd
Awf8F35  Awf8F35  Awf8F35  Awf8F35  Awf8F35 

Applications

BMW/MINI

Changan

Chery

Citroën

DS Automobiles

Exeed

Geely

GM

Jaguar

Land Rover

Lexus

  • 2012–present Lexus RX (V6 AL10 F-Sport, AL20 & AL30 non Hybrids)
  • 2018–present Lexus ES (non-hybrid engines)
  • 2020–present Lexus LM (LM350)
  • 2022– Lexus NX (non-hybrid engines)

Lynk & Co

  • 2017–present 01
  • 2018–present 03
  • 2020–present 05
  • 2021–present 02
  • 2021–present 09

Mitsubishi

Opel/Vauxhall


Peugeot

Polestar

Škoda

Toyota (as UA8xx)

Volkswagen/MAN

Volvo (TG-81SC/SD)

References

Tags:

Aisin SeikiTransverse engine

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