bodis

yes, my wife also drives it...

GSFRX350

My opinion is if there's two or more drivers who regularly drive the car the transmission, with its learning function, is constantly learning different driving styles. So if one person drives it hard, the other drives it gently it's trying to adjust and "getting confused". That's just my opinion - but then you said you had a 2016 which didn't have the issue, so that may have blown my theory out of the water. Did both of you drive the 2016 as well. Have you had the ECU reset to get it back to factory and start the learning afresh.

rxtimes2

I am pretty sure that 4th-Gen RX does not have an adaptive transmission, so no learning. If you have any info, or a manual reference on the adaptive transmission in our vehicles , I would love to have it.

bodis

thanks, i'll try the reset

GSFRX350

Maybe different models have/don't have but mine's Australian RX 350 F-Sport 2016.



https://www.clublexus.com/forums/rx-...-question.html

Here's a screenshot from the US manual about the AI Shift (Artificial Intelligence Shift) as Toyota/Lexus call it.

dunyamunya

I have read a few posts about transmission reset and only found one way to reset transmission in RX350 - disconnect the battery for a couple of minutes. I saw several sites mentioning the removal of EFI fuse for 30 seconds to do the same, but did not see any notes of it here. Is it possible to reset transmission that way on 4th gen RX?

mikemu30

Why do you feel the need to do this?

dunyamunya

There are times when transmission hesitates and gas usage is low. Wanted to reset and see if there is any difference. I have seen where, for example, BMW had 20 m/g usage before reset and 24 after.

Cocal

Not likely! MPG is directly related to performance, the best way to reset the transmission to improve MPG is your right foot.

GSFRX350

I have read a thread on here somewhere about resetting the tranny by removing the correct fuses, two I think. Keep searching around the forum and hopefully you should come across it. My car was a used one. 18,000 km, long story but my transmission was messed up, had it reset by the dealer and made a world of difference.

dunyamunya

This is what I'm trying to figure out, but nothing in rx 4th gen posts. Previous years, yes, but not current.

GSFRX350

Sorry - this is what I read but as you say not 4th Gen, although I suspect it would be the same procedure.

https://www.clublexus.com/how-tos/a/...our-ecu-363500

dunyamunya

Yap, that's the post I saw, but wanted to post here to make sure same procedure applies to 4th gen RX. I guess the only way to find out is to try...

tommytqt

I hate this so much. It happens all the time when the car is still cold but i have to leave right away.

Machine13

It's my understanding that Lexus vehicles do not have adaptive transmissions. They do not learn driving habits therefore there is nothing to reset.

There apparently have been some BMW (and Benz) models that do have adaptive transmissions. But those models seem to only adapt the transmission's shifting pattern based on the last 20 or so shifts. So, it's more of a real-time adaptation in racing situations.

Or are you talking about something other than adaptive transmissions?

Is there any information from the manufacturer that Lexus models have adaptive transmissions?