Rumble upon hard acceleration
05-30-23, 06:48 PM
#31
I think he’s telling the truth and it makes alot
of sense.
I always said it feels like it starts in the back of the car and travels to the front.
that would make sense that the clutch is slipping or some other issue
hopefully there is a fix. And yes I love my car.
just want it to not do that vibration when I lean into it a little bit.
of sense.
I always said it feels like it starts in the back of the car and travels to the front.
that would make sense that the clutch is slipping or some other issue
hopefully there is a fix. And yes I love my car.
just want it to not do that vibration when I lean into it a little bit.
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Datanator (05-30-23)
05-30-23, 07:19 PM
#32
Driver
Thread Starter
@Dunhill421, I agree - I do think there is legitimacy to what he's saying.
Look - in the spirit of being helpful to you, If your dealership needs to know more, have them contact Nalley Lexus in Roswell, Georgia. The service department should be familiar with this topic. Maybe some cross-pollenation with these service departments would be a good thing!
///D
Look - in the spirit of being helpful to you, If your dealership needs to know more, have them contact Nalley Lexus in Roswell, Georgia. The service department should be familiar with this topic. Maybe some cross-pollenation with these service departments would be a good thing!
///D
The following 2 users liked this post by Datanator:
Dunhill421 (05-31-23),
GregJK1 (07-14-23)
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GregJK1 (07-14-23)
05-31-23, 06:12 AM
#34
Racer
Appreciate the update. Just a bit of a side story about the AWD clutch if that is the case. The clutch that handles the rear drive is new design for Lexus NX and RX. Toyota and Lexus have been busy dreaming up new magnetic clutches for the rear drive lately. In the RAV4 Limited (and Highlander), they designed a new AWD system that has clutches that completely disconnect the drive shaft and rear drive. First years (2019-2020) they had a number of issues with noise and vibration (people called it the "Mooo"). Lexus went a completely different way for the NX/RX, instead of a disconnect system they actually took the standard Toyota AWD (which allows for disconnect but only aft, so drive shaft is always spinning), and beefed up the clutch so that NX has full time AWD (no disconnect at all). The clutch regulates power distribution at the rear from 25% to 50% so there is typically some slip occurring depending on circumstance.
Last edited by Droid13; 05-31-23 at 06:18 AM.
05-31-23, 12:56 PM
#35
Driver
Thread Starter
Appreciate the update. Just a bit of a side story about the AWD clutch if that is the case. The clutch that handles the rear drive is new design for Lexus NX and RX. Toyota and Lexus have been busy dreaming up new magnetic clutches for the rear drive lately. In the RAV4 Limited (and Highlander), they designed a new AWD system that has clutches that completely disconnect the drive shaft and rear drive. First years (2019-2020) they had a number of issues with noise and vibration (people called it the "Mooo"). Lexus went a completely different way for the NX/RX, instead of a disconnect system they actually took the standard Toyota AWD (which allows for disconnect but only aft, so drive shaft is always spinning), and beefed up the clutch so that NX has full time AWD (no disconnect at all). The clutch regulates power distribution at the rear from 25% to 50% so there is typically some slip occurring depending on circumstance.
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GregJK1 (07-14-23)
08-09-23, 11:38 PM
#36
Update at 5,000 Mile Service
I have experienced this with my 2023 NX 350 F Sport and have had it driven by the shop foreman to duplicate. Although I have felt this in all 3 modes, it is most apparent in Sport +. Typically, the "rumble" is noticeable at about 35 - 40 mph and 4-5,000 rpm. As most of you have noticed, this does not occur when you accelerate full throttle to reach passing speed, only from a slight rolling or dead stop. I do not have an answer yet, but they have duplicated the problem and are filing a report with Lexus. I'll post anything I find out. Current mileage 1,100.
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Dunhill421 (08-10-23)
08-10-23, 03:00 AM
#37
Just an update. Service Department Manager/Lead Tech advised that Lexus is aware of the problem due to an increasing number of reports. Unfortunately, I did not get details, but a software fix is supposed to be made available within the next few months to resolve the issue. I will update you when I have anything further.
im standing by for any other updates as to help
thank you.
12-14-23, 10:37 AM
#39
Just an update. Service Department Manager/Lead Tech advised that Lexus is aware of the problem due to an increasing number of reports. Unfortunately, I did not get details, but a software fix is supposed to be made available within the next few months to resolve the issue. I will update you when I have anything further.
I have an appointment the week of Christmas with the service manager and diag tech regarding this issue.
02-18-24, 05:21 PM
#40
Any updates from the dealership visit? My 2024 NX350 F-sport has the same issue. Rumble under hard acceleration, goes away at around 50mph. Only 2,500 miles on the car, but will bring this up during my next visit to the dealership. Thanks!
02-18-24, 08:30 PM
#41
Driver
Thread Starter
My service department diagnosed this - see post #30 in this thread where I explained the findings.
02-18-24, 09:38 PM
#42
Hope you get it fixed soon.
YMMV,
MidCow3
02-19-24, 06:15 AM
#43
02-19-24, 06:23 AM
#44
Driver
Thread Starter
Candidly, I all but forgot about the issue. It hasn’t been fixed and I didn’t escalate. I suppose it doesn’t bother me enough to spend more time on it. I own a business and I’m just too busy to chase this thing.
Stepping away from my reasons for not following through, I do have to say I’m disappointed in Lexus for allowing this and other problems to make it to market. This is my first Lexus and I did have high expectations for near perfection. It hasn’t soured me on the brand, but it definitely has lowered my likelihood of a repeat purchase.
02-19-24, 11:07 AM
#45
they are saying this is a normal characteristic of this model. And I don’t have a leg to stand on because of this.
I wish whoever had the dealer tell them they knew what was wrong could please post that dealer information with the name of the service advisor. I could have the head technician at my dealership call them to help get this escalated to lexus even further.