Toyota U660E / U760E 6-Speed Automatic Transaxle Power flow

Weber State University (WSU) - Automotive Technology Department - Transmission Lab. Toyota U660E / U760E 6-Speed Automatic Transaxle Power flow. The U660E / U760E transaxle is a 6-speed Aisin transaxle used in Toyota Camry and Lexus ES350. This transaxle uses a ravigneaux planetary gear set (with long and short pinion gears in the same planet carrier)

This video helps demonstrate NATEF Task A2.C.10. " Diagnose transmission/transaxle gear reduction/multiplication concerns using driving, driven, and held member (power flow) principles.", a priority 2 task.

Download the U660E Power Flow Table here: http://www.weber.edu/wsuimages/automotive/T-TEN/Toyota%20U660E%20Power%20Flow...

http://www.weber.edu/automotive

Category:

Education

Tags:

• U660E
• U660F
• U760E
• WSU
• Weber Auto
• GM
• ASEP
• Ford
• MLR
• Chrysler
• CAP
• Toyota
• T-TEN
• AAS
• BS
• Automatic
• Transmission
• 6-Speed

[MrGizmo757]

i Want to see a Demo on how the new Duble clutch automatics work. its an automatic that uses actuayl geared input and output shapfts just like a manual. and uses a Double wet CLutching system that somhow can engage one gear before the one before it even releases. i have only seen this on paper so i havent been able to wrap My head around it yet. BMW has one in the new M3. the only thing i do know about them is that they are very tough. you can beat the hell out of them and they wont break.

[WeberAuto]

@MrGizmo757 Hi, I would too, but I don't have access to one yet. It is my understanding that there are two input shafts; a solid shaft inside a hollow shaft. Each has its own clutch disk and is connected to opposite sequence gears. When shifting, one clutch drives one input shaft that drives one gear (lest say 1st gear). Next, to shift into 2nd, the other input shaft is connected to 2nd gear, so you just release the first clutch and apply the second; no synchronizers involved. and so on.

[dclaver2]

There are some cars that has automatic, but, you can also shift gears like a manual with no clutch pedal. Do you know how that works?

[WeberAuto]

@dclaver2 Hi, Some cars have paddle shifters on the steering wheel, others have a shift handle in the center console that has a plus and minus position allowing the driver to attempt to shift the transmission like a manual transmission. These are still automatics, but allow the drivers to request an upshift or downshift. If the conditions are right to allow the shift, the shift will take place. Some shift requests will not occur because of high or low vehicle speed verses requested gear.

[thejameskan]

good work here

[xtremetom180]

love the work here

[nesgael1]

@ThePustr117 I agree with the answer given but you used the word sync, That process is more applicable to manual transmissions where gear ratios are achieved by shuttling wheel gears to mesh with one another, Gears of different sizes create different ratios and a sync mechanism is needed to smoothly marry and disengage the gears. In the transmission above all the gear ratios are achieved by predetermined combinations of clutches and brakes that allow a gear set to rotate

[nesgael1]

@ pustr117 Part 2: gear set to rotate or restricts a gear set from rotation. the gears are always in contact but you get one ratio with the brake on the outer ring gear applied and another ratio with the outer ring gear spinning freely, From this point all the engineers had to do is, determine the combinations and sequence of breaking and releasing needed for all the different forward gears combinations and reverse. This is well explained in the presentation and is the focus in the video.

[blackericdenice]

@MrGizmo757 IF U find this info please let me know.

[MoneyMarcMes]

That was pretty cool!!!!

[Toad261183]

nn si puo vedere smontato?!nn ho capito....