Transmission Slip

[donayre21]

I remember in my e46 BMW (2000) had a similar self learning transmission. We were able to do a reset on the learning when the shifts were becoming "lazy". When it reset, it felt more peppy and the shifts were "harder".

how do you reset the thing

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[ah4rsr5]

how do you reset the thing

for the e46 it was a combination of buttons/commands. It's been a while but im sure you can do a search.

Idk anything about the new 4R

 

[LLL1990]

Self learning transmission huh. Man that is some wild stuff.

This isn't anything new, transmissions have been doing this for some time now. They do this to match your driving style and make the shifting more comfortable for you. If you drive aggressively they learn to hold gears longer and down shift quicker. Drive more relaxed and they will upshift sooner and require more throttle for a down shift. However they do need time to adapt so withhold judgment about gear hunting or slow response until they have time to learn.

With that said, they should still shift smoothly and not slam into gears or slip, that's not adaptive learning. When I test drove one I did notice the 2-3 shift was very firm but I just assumed it was because it was cold and would smooth out when it warmed up.

 

[nubbins_]

Self learning transmission huh. Man that is some wild stuff.

If anything, it's telling how much of a dinosaur Toyota has been on the tranny front. Adaptive learning has been a staple ever since I drove 6R80 and 6L80 vehicles. It's just that it can only be as good as the transmission is good, cough cough incorrigible 10R80, and has a more visible impact in transmissions with more gears

 

[Cityzen10]

This isn't anything new, transmissions have been doing this for some time now. They do this to match your driving style and make the shifting more comfortable for you. If you drive aggressively they learn to hold gears longer and down shift quicker. Drive more relaxed and they will upshift sooner and require more throttle for a down shift. However they do need time to adapt so withhold judgment about gear hunting or slow response until they have time to learn.

With that said, they should still shift smoothly and not slam into gears or slip, that's not adaptive learning. When I test drove one I did notice the 2-3 shift was very firm but I just assumed it was because it was cold and would smooth out when it warmed up.

I've driven another 250 miles and it hasn't slipped again. Really hoping it was just a fluke.

 

[hack]

your photo mentions resetting the transmission, but it does not offer any guidance on how to do so. Do I need a scanner tool to do that?

 

[Hypnosis4u2nv]

I get hard shifts in the lower gears EVERY cold start. The self learning "takes minutes to a few hours" doesn't apply when the car has over 1000 miles on the odometer, you've achieved those "few hours" already and then some. This is an internal issue with the transmission when the vehicle is cold. When the transmission warms up, this doesn't happen.

 

[Josalbrec6G]

I get hard shifts in the lower gears EVERY cold start. The self learning "takes minutes to a few hours" doesn't apply when the car has over 1000 miles on the odometer, you've achieved those "few hours" already and then some. This is an internal issue with the transmission when the vehicle is cold. When the transmission warms up, this doesn't happen.

Might be worth checking with the dealer. You have plenty of runway on your warranty and should get it checked if you are having trouble

 

[Hypnosis4u2nv]

Might be worth checking with the dealer. You have plenty of runway on your warranty and should get it checked if you are having trouble

I plan to. For now I'm using the manual mode to shift on a cold start till the engine gets to operating temp and I'm not experiencing that hard shifting.

 

[bkw777]

From Google:

The self-learning process for a Toyota 8-speed transmission, also known as adaptive learning, can take anywhere from a few minutes to a few hours, depending on driving conditions and the individual's driving style. It's a continuous process, but the initial learning phase, where the transmission adjusts to a new driver's preferences, is typically faster.


Yes, Toyota's 8-speed automatic transmissions, specifically the "Aisin-Toyota 8-speed transmission" (sometimes referred to as the "Direct Shift-&AT"), are designed with a self-learning capability. This system, often called "adaptive learning," uses the Transmission Control Module (TCM) to monitor and adjust shift parameters based on the driver's individual driving style and conditions. This helps to ensure smooth shifting and consistent shift feel over time.

What a terrible sounding idea.
Hello there could be 5 different drivers. What then?
You "learned" me for a few hours and then that's all out the window because it's not me today.

I hate when a tool, especially a vehicle or anything else that might be dangerous, does not behave exactly the same way all the time. If there is going to be a learning/adapting component in a system, there should be only one, and in this case that's the human. When you have two or more things that are each trying to game and outguess the other, modify their behavior to adapt to and anticipate (guess and get it wrong sometimes) the other, while the other is doing the same right back at the same time, nothing works.

Can you imagine a hammer that had the ability to guess when you are trying to strike, and strike extra hard on it's own? Now the thing is totally unpredictable and unusable. You are constantly failing to drive the nail in all the way or leaving dents in wood and holes in drywall all over the place becausee sometimes when you try to tap just the right amount, the thing fires off full power, but not always, sometimes it thinks it has learned your driving style and leaves a nail sticking out, then since you take a second swing it thinks "oh we didn't go hard enough, got it, harder this time" and leaves a dent the next time. It's completely insane.

 

[mars001]

I'm not sure what the transmission is trying to learn? The only difference between each driver is how hard he/she steps on the gas. Isn't transmission shifting based just on speed? Then why does it matter how I or my grandma drives?

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