Front differentil issue
Thread Starter
Driver School Candidate
Joined: Oct 2018
Posts: 3
Likes: 0
From: NJ
Front differentil issue
Hey
I recently bough a 2016 Lexus RX350 AWD
It was a certified pre-own lease car.
I bough it with 22k miles on it.
Right now I have a little over 25k miles
Issue I'm expirencing with this car is pretty hard to demonstrate and explin but it is there.
When I'm driving the car 55 m/h or over that on flat surface or downhill I hear a knocking sound when depressing and pressing the accelerator pedal.
I isulated that issue pretty well and it sound like it is coming from the front end diffrential or
front drive shaft.
I visit the dealr last week , test drove the car with a lexus master tech and was told to drive the car in sports mode and use premum gas.
They did update my ecu sofware to change shift pattern.
But problem still exist.
I dont think it is a transmission issue.
Did any of You guys had an issue like this ?
Any sugesstions ?
I recently bough a 2016 Lexus RX350 AWD
It was a certified pre-own lease car.
I bough it with 22k miles on it.
Right now I have a little over 25k miles
Issue I'm expirencing with this car is pretty hard to demonstrate and explin but it is there.
When I'm driving the car 55 m/h or over that on flat surface or downhill I hear a knocking sound when depressing and pressing the accelerator pedal.
I isulated that issue pretty well and it sound like it is coming from the front end diffrential or
front drive shaft.
I visit the dealr last week , test drove the car with a lexus master tech and was told to drive the car in sports mode and use premum gas.
They did update my ecu sofware to change shift pattern.
But problem still exist.
I dont think it is a transmission issue.
Did any of You guys had an issue like this ?
Any sugesstions ?
Racer
Joined: Nov 2017
Posts: 1,942
Likes: 581
From: New York
Hey
I recently bough a 2016 Lexus RX350 AWD
It was a certified pre-own lease car.
I bough it with 22k miles on it.
Right now I have a little over 25k miles
Issue I'm expirencing with this car is pretty hard to demonstrate and explin but it is there.
When I'm driving the car 55 m/h or over that on flat surface or downhill I hear a knocking sound when depressing and pressing the accelerator pedal.
I isulated that issue pretty well and it sound like it is coming from the front end diffrential or
front drive shaft.
I visit the dealr last week , test drove the car with a lexus master tech and was told to drive the car in sports mode and use premum gas.
They did update my ecu sofware to change shift pattern.
But problem still exist.
I dont think it is a transmission issue.
Did any of You guys had an issue like this ?
Any sugesstions ?
I recently bough a 2016 Lexus RX350 AWD
It was a certified pre-own lease car.
I bough it with 22k miles on it.
Right now I have a little over 25k miles
Issue I'm expirencing with this car is pretty hard to demonstrate and explin but it is there.
When I'm driving the car 55 m/h or over that on flat surface or downhill I hear a knocking sound when depressing and pressing the accelerator pedal.
I isulated that issue pretty well and it sound like it is coming from the front end diffrential or
front drive shaft.
I visit the dealr last week , test drove the car with a lexus master tech and was told to drive the car in sports mode and use premum gas.
They did update my ecu sofware to change shift pattern.
But problem still exist.
I dont think it is a transmission issue.
Did any of You guys had an issue like this ?
Any sugesstions ?
Racer
Joined: Feb 2017
Posts: 1,555
Likes: 345
From: Ontario, Canada
Also what makes you say that it wasn't designed for sport mode, I'm saying this because I don't have any of these problems, when in sports mode it's more responsive and more enjoyable to drive in eco it's a pig like most other vehicles
Racer
Joined: Nov 2017
Posts: 1,942
Likes: 581
From: New York
In case you missed the thread where it was stated that all the tests by Lexus were conducted using 91 octane (premium) that was the standard. In the manual it tells you not to go below 87 that's a warning not a recommendation!
Also what makes you say that it wasn't designed for sport mode, I'm saying this because I don't have any of these problems, when in sports mode it's more responsive and more enjoyable to drive in eco it's a pig like most other vehicles
Also what makes you say that it wasn't designed for sport mode, I'm saying this because I don't have any of these problems, when in sports mode it's more responsive and more enjoyable to drive in eco it's a pig like most other vehicles
Secondly, when he starts his car, I believe it defaults to Normal mode. If he's required to change it in order for it to run properly, then it should default to Sport mode.
Sorry but the dealer wants to weasel out on this one.
Racer
Joined: Feb 2017
Posts: 1,555
Likes: 345
From: Ontario, Canada
I disagree. First he has to make sure he's using at least 87 gas. If his car knocks on 87 and there's nothing wrong with it, then the manufacturer would have to specify something higher. Can't have it both ways.
Secondly, when he starts his car, I believe it defaults to Normal mode. If he's required to change it in order for it to run properly, then it should default to Sport mode.
Sorry but the dealer wants to weasel out on this one.
Secondly, when he starts his car, I believe it defaults to Normal mode. If he's required to change it in order for it to run properly, then it should default to Sport mode.
Sorry but the dealer wants to weasel out on this one.
Also the driving mode will default to the last setting, so if you were in sports mode when you shut it off that will be the mode that will exist when you start it again.
Thread Starter
Driver School Candidate
Joined: Oct 2018
Posts: 3
Likes: 0
From: NJ
Thank You for respond.
I am planning to visit dealership this week.
Will bring the subject up again.
If I will get negative respond this time I will try to get Lexus cooperate or regional manager involve into this issue.
I am planning to visit dealership this week.
Will bring the subject up again.
If I will get negative respond this time I will try to get Lexus cooperate or regional manager involve into this issue.
Intermediate
Joined: Apr 2017
Posts: 432
Likes: 114
From: NorCal
That's right, the manual warns not to go below 87, but all the tests were made using 91, the computer will compensate if using 87 but will not if using anything below that level.
Also the driving mode will default to the last setting, so if you were in sports mode when you shut it off that will be the mode that will exist when you start it again.
Also the driving mode will default to the last setting, so if you were in sports mode when you shut it off that will be the mode that will exist when you start it again.
If the car is shut off in eco or drive it will stay in eco or drive when started. If the car is shut off in sport or sport+ it will default to drive when started.
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Lexus Test Driver
Joined: Jul 2017
Posts: 9,659
Likes: 3,438
From: NJ
That's right, the manual warns not to go below 87, but all the tests were made using 91, the computer will compensate if using 87 but will not if using anything below that level.
Also the driving mode will default to the last setting, so if you were in sports mode when you shut it off that will be the mode that will exist when you start it again.
Also the driving mode will default to the last setting, so if you were in sports mode when you shut it off that will be the mode that will exist when you start it again.
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Racer
Joined: Feb 2017
Posts: 1,555
Likes: 345
From: Ontario, Canada
My car defaults to whatever setting was last selected, I don't have sport + only sport norm & eco
Intermediate
Joined: Dec 2017
Posts: 418
Likes: 119
From: Southern California