Toyota U transmission

Last updated

Toyota Motor Corporation's U family is a family of automatic front-wheel drive/rear-wheel drive/four-wheel drive transmissions found in later vehicle models.

Contents

U1xx

U140E

Applications

1st2nd3rd4thReverseFinal
3.9382.1941.4111.0193.1413.480

U140F

Applications

1st2nd3rd4thReverseFinal
3.9382.1941.4111.0193.1413.080

U142E

U150E

5 speed automatic transaxle

Gear ratios for this transmission

1st2nd3rd4th5thReverseFinal
3.9382.1941.4110.9730.7033.1413.478

Applications

U151E

5 speed automatic transaxle

Gear ratios

1st2nd3rd4th5thReverseFinal
4.2352.3601.5171.0470.7563.378Varies

Applications

U151E Final Drive Ratios

Camry/SolaraHighlanderSienna/Rav4
3.2913.4783.080

U151F

5 speed automatic transaxle (4x4)

Application

U2xx

U240E

4 speed automatic transaxle

Gear ratios for this transmission.

1st2nd3rd4thReverseFinal
3.9432.1971.4131.0203.1453.120

Applications

U241E

Gear ratios

1st2nd3rd4thReverseFinal
3.9432.1971.4131.0203.1452.740

Applications

  1. 4 cyl. "Aurion Version" in South east Asia 2.0 liter Previa

U250E

The U250E is a 5-speed version of the U241E.

Gear ratios

1st2nd3rd4th5thReverseFinal
3.9432.1971.4130.9750.7033.1453.391

Applications

U3xx

U340E

4 speed automatic transaxle

Gear ratios

1st2nd3rd4thReverseFinal
2.8471.5521.0000.7002.3434.237

Application

U341E

Gear ratios

1st2nd3rd4thReverseFinal
2.8471.5521.0000.7002.3434.237

Application

U341F

1st2nd3rd4thReverseFinal
2.8471.5521.0000.7002.3434.237

Application

U6xx

Production of the U660E and U660F commenced in January 2006, Toyota's first 6-speed automatic transaxles for front-wheel-drive vehicles; transaxles feature a compact gear train that achieves six speeds using a single axis to produce a high torque of 400 Nm, and are as low cost, compact, and light as 4-speed automatic transaxles [1] The transaxle is a Lepelletier design which uses a simple gear set to drive a Ravigneaux planetary gear set (with long and short pinion gears in the same planet carrier). [2]

U660E

6 speed automatic transverse (V6) 6 speed version of the U151E and F

Application

1st2nd3rd4th5th6thReverseFinal
3.3001.9001.4211.0000.7130.6094.148Varies

u660e Final Drive Ratios

Avalon

08-12

Avalon

13-15

Blade

07-12

Camry

08-11

Camry

12-15

Highlander

14-15

Sienna

11-15

Venza

09-15

Zio

07-13

Lotus

Evora

3.6853.2383.6853.6853.4584.1543.9354.3983.6853.685

U660F

Application

U661 E/F

6 speed automatic communicates with engine to calculate torque with reduced-friction clutch and thrust bearings multi-mode automatic transmission, electronically controlled transmission with intelligence (ECT-i)

1st2nd3rd4th5th6thReverseFinal FWDFinal AWD
3.3001.9001.4201.0000.7130.6084.1483.8884.117
2WDAWD
3.8884.117

U760E

U760E/F

6 speed automatic transaxle (I4) 6 speed version light duty version of the U660E/F

Application

1st2nd3rd4th5th6thReverseFinal
3.3001.9001.4201.0000.7130.6084.1483.815

U761E

Application

U760F

Application

U8xx

U880F

8 speed automatic transaxle (V6)

Application

U881E/F

8 speed automatic transaxle (V6)

Application

UA 80E · UA 80F · UB 80E/F

Production of the UA80E and UA80F commenced in August 2016. This transaxle features a compact gear train that achieves eight speeds using a single axis allowing for input torque up to 430Nm. It is a more compact and optimized version of the U880 automatic transmission structure with additional features for improved performance and efficiency. The marketing name for the transmission is the "Direct Shift – 8AT 8-speed automatic transmission" [3] [4] Unlike the U880 transmission, which was developed for Toyota by Aisin AW, the UA80 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 UB80E/F transmissions are used for lower torque applications, 4 cylinder engines, and rated at 280Nm. [5]

UA80 Failures and Problems

The UA80 family of 8 speed transmissions has had some issues which has led to class action lawsuits, Customer Support Program and 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. [6] [7]

Additional issues arose when 2017 & 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. [8] 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 60K mile powertrain warranty. [9]

More whine or grind issues have been documented in 2021 Avalon, Camry and Highlanders equipped with the UA80E or UA80F transmission prompting T-SB-0008-21. [10]

Specifications

Gear Teeth and RatiosPlanetary Gear Set: Teeth [lower-alpha 1] CountTotalAvg.
Ravigneaux Ravigneaux
Model
Type
Version
First Delivery
[lower-alpha 2]
[lower-alpha 3]
[lower-alpha 4]
[lower-alpha 5]
[lower-alpha 6]
[lower-alpha 7]
[lower-alpha 8]
[lower-alpha 9]
Brakes
Clutches
Ratio
Span
Gear
Step
GearR 1R 212345678Final Drive
TBD0  N⋅m (0  lb⋅ft ) · TBD38
(58)
(58)
78
36
44
44
96
2
4
7.58331.3357
Ratio4.25452.18185.20002.97141.95001.47001.22351.00000.81750.6857TBD
TBD0  N⋅m (0  lb⋅ft ) · TBD38
(58)
(58)
78
26
34
34
70
2
4
7.80001.3410
Ratio4.01472.05885.25003.02881.95001.45701.22091.00000.80860.6731TBD
UA 80E430  N⋅m (320  lb⋅ft )
2016
42
(62)
(62)
82
26
34
34
70
2
4
8.20001.3507
Ratio4.22062.05885.51923.18422.05001.49201.23491.00000.80080.6731TBD
  1. Planetary gearset orientation: (1) Compound Ravigneaux gearset 1 is on the input (turbine) side (2) Output shaft is ring 2.2 (ring gear of outer Ravigneaux gearset part of compound Ravigneaux gearset 2)
  2. Sun 1.1: sun gear of inner Ravigneaux gearset part of compound Ravigneaux gearset 1
  3. Ring 1.1: ring gear of inner Ravigneaux gearset part of compound Ravigneaux gearset 1
  4. Sun 1.2: sun gear of outer Ravigneaux gearset part of compound Ravigneaux gearset 1
  5. Ring 1.2: ring gear of outer Ravigneaux gearset part of compound Ravigneaux gearset 1
  6. Sun 2.1: sun gear of inner Ravigneaux gearset part of compound Ravigneaux gearset 2
  7. Ring 2.1: ring gear of inner Ravigneaux gearset part of compound Ravigneaux gearset 2
  8. Sun 2.2: sun gear of outer Ravigneaux gearset part of compound Ravigneaux gearset 2
  9. Ring 2.2: ring gear of outer Ravigneaux gearset part of compound Ravigneaux gearset 2

UA 80E

8 speed direct shift automatic transverse for high torque (430 Nm) applications (V6)

Application

UA 80F

Application

UB 80E/F

8 speed direct shift automatic transverse for low torque (280 Nm) applications

Application

UP3xx

P311

CVT automatic transaxle

Application

P410

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References

  1. "Toyota Global Drivetrain Technical Development" (Press release). Toyota. 2011-12-31. Retrieved 2016-01-03.
  2. Archived at Ghostarchive and the Wayback Machine : U660E / U760E 6-Speed Automatic Transaxle Ravigneaux Gear Set and Components. YouTube .
  3. "'The Year of More' for the 2017 Highlander with More Power, More Safety, and More Model Choices". 27 September 2016.
  4. YouTube, a Google company. YouTube . Archived from the original on 2020-04-08.
  5. "Benchmarking a 2018 Toyota Camry UB80E Eight-Speed Automatic Transmission" (PDF). SAE International. Retrieved 14 April 2020.
  6. "TOYOTA 8-SPEED TRANSMISSION PROBLEMS LEAD TO LAWSUIT". 7 April 2020.
  7. "Morales v. Toyota Motor Sales, U.S.A., Inc". 14 October 2020.
  8. "CUSTOMER SUPPORT PROGRAM BULLETIN (ZJC): REPAIR COVERAGE FOR UA80 TRANSMISSION ON CERTAIN 2017-2018 MY SIENNA AND CERTAIN 2017-2018 MY HIGHLANDER VEHICLES" (PDF). 18 April 2019.
  9. "Official 2017-2019 UA80 Transmission Whine Failure Thread". 6 March 2024.
  10. "Whine or Grind Noise From the Transmission" (PDF). 9 February 2021.