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Aisin–Toyota 8-speed automatic transmission

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(Redirected from Aisin AWF8F35)
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
ManufacturerToyota · Aisin AW
Also calledBMW & Mini GA8 F22AW
Volvo TG-81SC/SD
GM AW F8 F45 & AF50-8
VW AQ 450
PSA EAT8
Production2006–present
Body and chassis
Class8-speed automatic transmission
RelatedZF 8HP · GM 8L · MB 9G-Tronic · ZF 9HP
Chronology
PredecessorAWTF-80 SC transmission

Aisin and Toyota offer a well-developed 8-speed automatic transmissions family.

The Aisin TL-80SN (Toyota AA 80E) series is the world's first 8-speed automatic transmission for passenger cars.[1] It is designed for longitudinal engines and was first used in the 2007 model year Lexus LS 460. To make it also suitable for transverse engines, Toyota has designed the transmission to fit in the same space as previous Lepelletier gear mechanism-based 6-speed transmissions, while increasing the overall gear spread (span), reducing the gear steps, and increasing the torque capacity.[2]

The Aisin AW F8 F45 (Toyota UA 80E) series is the world's first 8-speed automatic transmission designed for use in transverse engine applications.[3] It is also called the EAT8 (PSA), GA 8F 22AW (BMW & Mini), TG-81SC (Volvo),[4] AF50-8 (Opel/Vauxhall),[5] AW F8 F45[6] (Cadillac), and AQ 450 (Volkswagen Group).[7] First usage was in the 2013 model year Lexus RX 350 F Sport.

The marketing name for the transmission is the "Direct Shift – 8AT 8-speed automatic transmission"[8][9] Unlike the UB 80E/F transmission, which was developed for Toyota by Aisin AW, the UA 80E/F was developed in a joint venture between Toyota and Aisin AW. Due to global application, development was done in a global fashion involving engineering resources in both Japan and the US. The Aisin AW F8 F35 (Toyota UB 80E/F) transmissions are used for lower torque applications, 4 cylinder engines, and rated at 300 N⋅m (221 lb⋅ft).[10]

Gear Ratios[a]
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
AE 80E/F 2010 −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 2010 −2.053 −3.825 4.845 2.840 1.864 1.437 1.217 1.000 0.816 0.672 7.206 1.805 1.326
TR-81SD 2010 −2.182 −4.066 4.970 2.840 1.864 1.437 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 1.470 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 1.470 1.224 1.000 0.817 0.686 7.583 1.888 1.336
  1. ^ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage

Specifications

[edit]

Layout

[edit]

Gearset 1 is not an ordinary gearset but a reversed 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 8-speed transmissions from competitors. This meant that an 8-speed automatic transmission was also possible for transverse engines.

Progress

[edit]

Smaller parts and a hydraulic circuit with fewer components allow the transmission to maintain the same size as the previous LS 430's 6-speed transmission. The aluminum die-cast case is 10 % lighter, yet 30 % more rigid, even with two additional gears and a 22 % greater torque capacity the new transmission weighs 95 kg (209 lb) or 10 % more than the previous unit. With new micro-laser technology gear tooth production tolerances have been reduced 50 %. Aluminum has also replaced steel on gear tooth surfaces. Shift times are as low as 350 milliseconds or 41 % faster than the previous LS 430's unit.

The Lexus IS F and LS 460 (with sport package) use Sport Direct Shift (SPDS) which allows for faster shift times. The torque converter can lockup from 2nd to 8th gears.

Two Possible Reverse Gears

[edit]

The layout offers 2 reverse gears.[11][12][13]

The reverse gear is formed in gearset 3, the outer one of the Ravigneaux gearset. In the fast reverse gear R2,[13] this part of the Ravigneaux gearset is directly connected to the input (turbine) side. In the usual reverse gear R1, the input is put through gearset 1 first, where the shaft speed has been reduced.

This reduction is reflected in the ratio of the 3rd gear as well. Therefore, the gear step between the two reverse gears ties with the ratio of the 3rd gear.

Due to the increasing electronic control of automatic transmissions, a fast (i. e. designed to reduce wheelspin) reverse gear is no longer necessary for problem-free starting in icy conditions (winter mode). Car manufacturers who use this transmission in their vehicles are therefore increasingly dispensing with the option of being able to shift into the fast reverse gear. For individual vehicles, the specifications of the respective manufacturer are authoritative.

R1 And R2
Gear Ratio Algebra
R2 [13]
3
R2 x 3
R1
Gear Ratios
With Assessment Planetary Gearset: Teeth[a] Count Total[b]
Center[c]
Avg.[d]
Reversed Ravigneaux
Aisin
Toyota
Version
First Delivery
S1[e]
R1[f]
S2[g]
R2[h]
S3[i]
R3[j]
Brakes
Clutches
Ratio
Span
Gear
Step[k]
Gear
Ratio
R2
R1
1
2
3
4
5
6
7
8
Step[k] [l] [m]
Δ Step[n][o]
Shaft
Speed
Δ Shaft
Speed[p]
Longitudinal engines
TL-80SN
AA 80E/F
550 N⋅m (406 lb⋅ft) · 2006 38
82
30
34
34
74
2
4
6.7091
1.7748
1.3125[k]
Gear
Ratio
−2.1765[13]
−4.0561[l]
4.5970
2.7241[m]
1.8636
1.4642[k][p]
1.2313[o][p]
1.0000
0.8245
0.6852
Step 1.8636 0.8824[l] 1.0000 1.6875[m] 1.4617 1.2728[k] 1.1891 1.2313 1.2129 1.2033
Δ Step[n] 1.1545 1.1484 1.0704 0.9657[o] 1.0152 1.0080
Speed –2.1121 -1.1333 1.0000 1.6875 2.4667 3.1396 3.7333 4.5970 5.5758 6.7091
Δ Speed 0.9788 1.1333 1.0000 0.6875 0.7792 0.6729[p] 0.5938[p] 0.8636 0.9788 1.1333

AE 80E/F

550 N⋅m (406 lb⋅ft) · 2015
38
83
30
38
38
78
2
4
7.1319
1.7957
1.3240[k]
Gear
Ratio
−2.0526
−3.7860[l]
4.7956
2.8112[m][o]
1.8444
1.4294[k][p]
1.2137[o][p]
1.0000[o]
0.8176
0.6724
Step 1.8444 0.7895[l] 1.0000 1.7059[m] 1.5241 1.2904[k] 1.1777 1.2137 1.2230 1.2160
Δ Step[n] 1.1192[o] 1.1811 1.0957 0.9703[o] 0.9924[o] 1.0058
Speed –2.3363 -1.2667 1.0000 1.7059 2.6000 3.3550 3.9511 4.7956 5.8653 7.1319
Δ Speed 1.0696 1.2667 1.0000 0.7059 0.8941 0.7550[p] 0.5961[p] 0.8444 1.0696 1.2667
TR-80SD[14]
550 N⋅m (406 lb⋅ft) · 2010
38
82
30
38
38
74
2
4
7.2061
1.8050
1.3260[k]
Gear
Ratio
−2.0526
−3.8254[l]
4.8455
2.8404[m][o]
1.8636
1.4369[k][p]
1.2169[o][p]
1.0000[o]
0.8158
0.6724
Step 1.8636 0.7895[l] 1.0000 1.7059[m] 1.5241 1.2970[k] 1.1808 1.2169 1.2258 1.2133
Δ Step[n] 1.1192[o] 1.1751 1.0984 0.9703[o] 0.9928[o] 1.0103
Speed –2.3606 -1.2667 1.0000 1.7059 2.6000 3.3722 3.9818 4.8455 5.9394 7.2061
Δ Speed 1.0939 1.2667 1.0000 0.7059 0.8941 0.7722[p] 0.6096[p] 0.8636 1.0939 1.2667
TR-81SD[15]
600 N⋅m (443 lb⋅ft) · 2010
38
82
36[q]
44
44[q]
96
2
4
7.2475
1.8460
1.3270[k]
Gear
Ratio
−2.1818
−4.0661[l]
4.9697
2.8398[m][o]
1.8636
1.4370[k][p]
1.2103[o][p]
1.0000[o]
0.8248
0.6857
Step 1.8636 0.8181[l] 1.0000 1.7500[m] 1.5238 1.2969[k] 1.1873 1.2103 1.2124 1.2028
Δ Step[n] 1.1484[o] 1.1750 1.0923 0.9810[o] 0.9983[o] 1.0079
Speed –2.2778 -1.2222 1.0000 1.7500 2.6667 3.4583 4.1061 4.9697 6.0253 7.2475
Δ Speed 1.0556 1.2222 1.0000 0.7500 0.9167 0.7917[p] 0.6477[p] 0.8636 1.0556 1.2222
TR-82SD[16]
850 N⋅m (627 lb⋅ft) · 2010
38
83
36[q]
44
44[q]
96
2
4
7.1728
1.8365
1.3251[k]
Gear
Ratio
−2.1818
−4.0242[l]
4.9185
2.8106[m][o]
1.8444
1.4295[k][p]
1.2073[o][p]
1.0000[o]
0.8266
0.6857
Step 1.8444 0.8181[l] 1.0000 1.7500[m] 1.5238 1.2903[k] 1.1841 1.2073 1.2098 1.2054
Δ Step[n] 1.1484[o] 1.1810 1.0897 0.9808[o] 0.9979[o] 1.0037
Speed –2.2543 -1.2222 1.0000 1.7500 2.6667 3.4407 4.0741 4.9185 5.9506 7.1728
Δ Speed 1.0321 1.2222 1.0000 0.7500 0.9167 0.7741[p] 0.6333[p] 0.8444 1.0321 1.2222

AL 80E/F

TBD · 2023
38
78
38
46
46
86
2
4
6.7737
1.6957
1.3143[k]
Gear
Ratio
−1.8696
−3.6457[l]
4.4132
2.8084[m][o]
1.9500
1.5112[k][p]
1.2743[o][p]
1.0000[o]
0.7933
0.6515
Step 1.9500 0.8261[l] 1.0000 1.5714 1.4402 1.2904[k] 1.1859 1.2743 1.2606 1.2176
Δ Step[n] 1.0911[o] 1.1161 1.0881 0.9306[o] 1.0109[o] 1.0353
Speed –2.3605 -1.2105 1.0000 1.5714 2.2632 2.9203 3.4632 4.4132 5.5632 6.7737
Δ Speed 1.1500 1.2105 1.0000 0.5714 0.6917 0.6571[p] 0.5429[p] 0.9500 1.1500 1.2105
Transverse engines
AW F8 F35
UB 80E/F[12]
300 N⋅m (221 lb⋅ft) · 2013 38
78
26
34
34
70
2
4
7.8000
1.8798
1.3410[k]
Gear
Ratio
−2.0588
−4.0147[l]
5.2500
3.0288[m][o]
1.9500
1.4570[k][p]
1.2209[o][p]
1.0000[o]
0.8086
0.6731
Step 1.9500 0.7647[l] 1.0000 1.7333[m] 1.5533 1.3384[k] 1.1933 1.2209 1.2366 1.2014
Δ Step[n] 1.1159[o] 1.1605 1.1215 0.9774[o] 0.9873[o] 1.0293
Speed –2.5500 -1.3077 1.0000 1.7333 2.6923 3.6033 4.3000 5.2500 6.4923 7.5833
Δ Speed 1.2423 1.3077 1.0000 0.7333 0.9590 0.9110[p] 0.6967[p] 0.9500 1.2423 1.3077
AW F8 F45
UA 80E/F
430 N⋅m (317 lb⋅ft) · 2013[6] 42
82
26
34
34
70
2
4
8.2000
1.9274
1.3507[k]
Gear
Ratio
−2.0588
−4.2206[l]
5.5192
3.1842[m][o]
2.0500[o]
1.4920
1.2349[o][p]
1.0000[o]
0.8008
0.6731
Step 2.0500 0.7647[l] 1.0000 1.7333[m] 1.5533 1.3740 1.2082 1.2349 1.2488 1.1897
Δ Step[n] 1.1159[o] 1.1305[o] 1.1372 0.9783[o] 0.9889[o] 1.0496
Speed –2.6808 -1.3077 1.0000 1.7333 2.6923 3.6992 4.4692 5.5192 6.8923 8.2000
Δ Speed 1.3731 1.3077 1.0000 0.7333 0.9590 1.0069 0.7700[p] 1.0500 1.3731 1.3077
TG-80LS
UB 80E/F
350 N⋅m (258 lb⋅ft) · 2017 38
78
30
38
38
78
2
4
7.5400
1.8464
1.3346[k]
Gear
Ratio
−2.0526
−4.0026[l]
5.0700
2.9721[m][o]
1.9500
1.4698[k][p]
1.2306[o][p]
1.0000[o]
0.8082
0.6724
Step 1.9500 0.7895[l] 1.0000 1.7059[m] 1.5241 1.3267[k] 1.1944 1.2306 1.2373 1.2019
Δ Step[n] 1.1192[o] 1.1488 1.1108 0.9706[o] 0.9945[o] 1.0295
Speed –2.4700 -1.2667 1.0000 1.7059 2.6000 3.4494 4.1200 5.0700 6.2733 7.5400
Δ Speed 1.2033 1.2667 1.0000 0.7059 0.8941 0.8494[p] 0.6706[p] 0.9500 1.2033 1.2667
TBD TBD · TBD 38
78
36[q]
44
44[q]
96
2
4
7.5833
1.8883
1.3357[k]
Gear
Ratio
−2.1818
−4.2545[l]
5.2000
2.9714[m][o]
1.9500
1.4700[k][p]
1.2235[o][p]
1.0000[o]
0.8175
0.6857
Step 1.9500 0.8181[l] 1.0000 1.7500[m] 1.5238 1.3266[k] 1.2014 1.2235 1.2233 1.1921
Δ Step[n] 1.1484[o] 1.1486 1.1042 0.9819[o] 1.0002[o] 1.0261
Speed –2.3833 -1.2222 1.0000 1.7500 2.6667 3.5375 4.2500 5.200 6.3611 7.5833
Δ Speed 1.1611 1.2222 1.0000 0.7500 0.9167 0.8708[p] 0.7125[p] 0.9500 1.1611 1.2222
Ratio
R & Even
Ratio
R & Odd
Algebra And Actuated Shift Elements
Brake A
Brake B
Clutch C
Clutch D
Clutch E
Clutch F
  1. ^ Layout
    • Input and output are on opposite sides
    • Planetary gearset 1 is on the input (turbine) side
    • Input shafts are C1 (planetary gear carrier of reversed gearset 1) and, if actuated, C2 and C3 (the compound planetary gear carrier of the Ravigneaux gearset)
    • Output shaft is R3 (ring gear of outer Ravigneaux gearset)
  2. ^ Total Ratio Span (Total Ratio Spread · Total Gear Ratio)
    • A wider span enables the
      • downspeeding when driving outside the city limits
      • increase the climbing ability
        • when driving over mountain passes or off-road
        • or when towing a trailer
  3. ^ Ratio Span's Center
    • The center indicates the speed level of the transmission
    • Together with the final drive ratio
    • it gives the shaft speed level of the vehicle
  4. ^ Average Gear Step
    • With decreasing step width
      • the gears connect better to each other
      • shifting comfort increases
  5. ^ Sun 1: sun gear of gearset 1: reversed gearset
  6. ^ Ring 1: ring gear of gearset 1 reversed gearset
  7. ^ Sun 2: sun gear of gearset 2: inner Ravigneaux gearset
  8. ^ Ring 2: ring gear of gearset 2: inner Ravigneaux gearset
  9. ^ Sun 3: sun gear of gearset 3: outer Ravigneaux gearset
  10. ^ Ring 3: ring gear of gearset 3: outer Ravigneaux gearset
  11. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad Standard 50:50
    — 50 % Is Above And 50 % Is Below The Average Gear Step —
    • With steadily decreasing gear steps (yellow highlighted line Step)
    • and a particularly large step from 1st to 2nd gear
      • the lower half of the gear steps (between the small gears; rounded down, here the first 3) is always larger
      • and the upper half of the gear steps (between the large gears; rounded up, here the last 4) is always smaller
    • than the average gear step (cell highlighted yellow two rows above on the far right)
    • lower half: smaller gear steps are a waste of possible ratios (red bold)
    • upper half: larger gear steps are unsatisfactory (red bold)
  12. ^ a b c d e f g h i j k l m n o p q r s t u Standard R:1
    — Reverse And 1st Gear Have The Same Ratio —
    • The ideal reverse gear has the same transmission ratio as 1st gear
      • no impairment when maneuvering
      • especially when towing a trailer
      • a torque converter can only partially compensate for this deficiency
    • Plus 11.11 % minus 10 % compared to 1st gear is good
    • Plus 25 % minus 20 % is acceptable (red)
    • Above this is unsatisfactory (bold)
  13. ^ a b c d e f g h i j k l m n o p q r s t Standard 1:2
    — Gear Step 1st To 2nd Gear As Small As Possible —
    • With continuously decreasing gear steps (yellow marked line Step)
    • the largest gear step is the one from 1st to 2nd gear, which
      • for a good speed connection and
      • a smooth gear shift
    • must be as small as possible
      • A gear ratio of up to 1.6667:1 (5:3) is good
      • Up to 1.7500:1 (7:4) is acceptable (red)
      • Above is unsatisfactory (bold)
  14. ^ a b c d e f g h i j k From large to small gears (from right to left)
  15. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg Standard STEP
    — From Large To Small Gears: Steady And Progressive Increase In Gear Steps —
    • Gear steps should
      • increase: Δ Step (first green highlighted line Δ Step) is always greater than 1
      • As progressive as possible: Δ Step is always greater than the previous step
    • Not progressively increasing is acceptable (red)
    • Not increasing is unsatisfactory (bold)
  16. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am Standard SPEED
    — From Small To Large Gears: Steady Increase In Shaft Speed Difference —
    • Shaft speed differences should
      • increase: Δ Shaft Speed (second line marked in green Δ (Shaft) Speed) is always greater than the previous one
    • 1 difference smaller than the previous one is acceptable (red)
    • 2 consecutive ones are a waste of possible ratios (bold)
  17. ^ a b c d e f 36/44 and 44/96 or 27/33 and 33/72

UA 80E/F Failures And Problems

[edit]

The UA 80E/F family of 8-speed transmissions has had some issues which led to class action lawsuits, a Customer Support Program and numerous TSBs. Starting in 2017, some Highlander and Sienna customers starting complaining of harsh or delayed shifting, delayed acceleration, hesitation, jerking, unintended acceleration, lurching and excessive revving before upshifting.[17][18]

Additional issues arose when 2017 and 2018 Highlander and Sienna customers experienced whining, master warning lights/check engine lights and transmission failures. This prompted Toyota to initiate a Customer Support Program (ZJC). This program covered certain 2017 and early 2018 built Highlanders and Sienna under specific VIN parameters and transmission build dates.[19] However, this issue has been problematic beyond the scope of the ZJC program. This is causing out of pocket costs for customers outside of the standard 6 yrs./60K mls. powertrain warranty.[20]

More whine or grind issues have been documented in 2021 Avalon, Camry and Highlanders equipped with the UA 80E/F transmission prompting T-SB-0008-21.[21]

Applications

[edit]

Longitudinal Engines

[edit]

Toyota & Lexus: AA 80E

[edit]

8-speed automatic RWD transmission.

Toyota & Lexus: AA 80F

[edit]

8-speed automatic AWD transmission.

Toyota & Lexus: AA 81E

[edit]

Pairs with Toyota 2GR-FSE and 2GR-FKS V6 engines.

Toyota & Lexus: AE 80F

[edit]

Toyota & Lexus: AL 80E

[edit]

Toyota & Lexus: AL 80F

[edit]
  • 2010–2015 Q7 1st generation (type 4L) 3.0 L TFSI · 3.6 L FSI · 4.2 L FSI[14]
  • 2010–2015 Q7 1st generation (type 4L) 3.0 L TDi[15]
  • 2010–2015 Q7 1st generation (type 4L) 4.2 L TDi[16]
  • 2019–2023 HS7 1st generationI[14]
  • 2023–present HS7 2nd generation[14]
  • 2010–2017 Cayenne 2nd generation (type E2 92A) 3.0 L TFSI · 3.6 L FSI · 4.2 L FSI[14]
  • 2010–2018 Cayenne 2nd generation (type E2 92A) 3.0 L TDi[15]
  • 2010–2017 Cayenne 2nd generation (type E2 92A) 4.2 TDi · 4.8 L Turbo[16]
  • 2013–2017 Panamera 1st generation (type G1 970) facelift 3.0 L TDi[16]
  • 2010–2018 Touareg 2nd generation (type 7P) 3.0 L TFSI · 3.6 L FSI · 4.2 L FSI[14]
  • 2010–2018 Touareg 2nd generation (type 7P) 3.0 L TDi[15]
  • 2010–2015 Touareg 2nd generation (type 7P) 4.2 L TDi[16]

Transverse Engines

[edit]

Toyota (UA 80E/F)

[edit]

Lexus (UA 80E/F)

[edit]
  • 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–present Lexus NX (non-hybrid engines)
  • 2024–present Lexus LBX (Morizo RR)

Toyota & Lexus (UB 80E/F)

[edit]

Toyota & Lexus (UB 81E/F)

[edit]

BMW/MINI

[edit]

Changan

[edit]

Chery

[edit]

Citroën

[edit]

DS Automobiles

[edit]

Exeed

[edit]

Geely

[edit]

GM

[edit]

Jaguar

[edit]

Land Rover

[edit]

Lynk & Co

[edit]
  • 2017–present 01
  • 2018–present 03
  • 2020–present 05[28]
  • 2021–present 02
  • 2021–present 09

Mitsubishi

[edit]

Opel/Vauxhall

[edit]

Peugeot

[edit]

Polestar

[edit]

Škoda

[edit]

Volkswagen/MAN

[edit]

Volvo (TG-81SC/SD)

[edit]

See also

[edit]

References

[edit]
  1. ^ Arellano, Joel (2006-01-08). "Lexus LS 460: World Introduction". Autoblog. Retrieved 2009-02-13.
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