Nope. Never heard from Lexus with a fix. Had the car for a year now and it is still jumping with braking….

 

I have a 22 NX350 and have a similar issue. The transmission also drops into a lower gear when accelerating to a slow speed. I know this is their new 8-speed, but it isn’t smooth at all on the 350 at least. I also have the engine knocking, even with only using 93 octane fuel since day 1. My 2019 NX300 ran a lot smoother.

 

Thanks for the quick reply. I may bring it in to have a technician ride with me. I will report back here if I do and there is an answer.

 

Yeah I have always used high octane gas with this car, hasnt helped with my issue. Seems like this is an issue I will have with this car until I sell it....

 

Mine has the same issue for the first three month.. but it gradually disappeared as the mileage goes up, so I guess it’s the break-in period for new cars..

 

Thanks! Hopefully that’s the case. In our case it’s worse when it’s cold. It’s definitely the downshifting as I can watch it move through the gears. As soon as it down shifts the car jumps under the same breaking load. It seems to improve as the car warms up.

 

Lexus transmission needs to be broken in. So is the engine. Driving it hard for a bit, and over time, don't baby it. The engine and the transmission will work itself out after about 10K miles. That's from personal experience with different Lexus LX and LS models.

 

New 2023 NX 350 AWD and noticing the same thing. I noticed jumping from 5 to 4, as well as from 4 to 3–but definitely much more noticeable going into 3rd gear. All the other gears have seamless transitions. I also noticed it’s significantly worse when the engine is cold. After it warms up a bit and it’s driving around, it gets to the point where it’s barely noticeable.

Is everyone here with a 350 experiencing the same thing? Going to go to the dealer next week and test drive another NX 350 to see if it does the same thing.

 

Reviving this thread. I notice this issue particularly when downshifting from 2nd to 1st gear while braking. The car will buck really noticeably. I'm only at 2 months and 1k miles, so I'll see how it continues to break in until the 6 month service.

 

What rpm bump are you getting when the transmission downshifts while slowing?

 

I will say as time has gone, the jerkiness has calmed down a lot. So maybe it is indeed the transmission breaking itself in. Knock on wood.

 

Lexus needs to address this design flaw...it is UNSAFE ...ESPECIALLY in some snow...front end takes a nose dive....this combined with a poorly implemented drivers lane assist that heads the car to the ditch far too often, makes me deeply regret buying the NX 350....please don't suggest taking it to the dealer.....I don't need another "gee we've never heard that before'....lexus....stop resting on your laurels and get hot responding to feedback....

 

IMO, file a complaint with https://www.nhtsa.gov/ if it's an issue with many filers then they will investigate.

 

All these complaints for the same problem is not good.

Typically, transmission upshifts and downshifts are quite different and can be a bit harsh during cold ambient temperature conditions for which it is dependent on the temperature of both the engine and transmission with the shifts controlled by the ECU. Really cold conditions can prevent normal operation for a long time. Highway travel at deep sub-freezing temperatures may result in the ATF not reaching typical operating temperature for close to an hour or longer. A cold engine and transmission will normally hold a lower gear longer before upshifting. However, it appears the complaints about jerkiness, jumping and bucking are not typically experienced during long periods of transmission warmup.

 

2nd owner of 2023 with 10K miles. Seems like that's sufficient as break in period, but we still notice this jerking. More pronounced during harder deceleration with the brake pedal than if slowly coasting to a stop. Goes away if the engine stop/start is off. Has it gotten better for those that experienced this?