IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

Transmission not rev matching from third to second

Thread Tools
 
Search this Thread
 
Old Feb 7, 2020 | 02:08 AM
  #1  
sunamer's Avatar
sunamer
Thread Starter
Advanced
 
Joined: Nov 2018
Posts: 628
Likes: 184
From: OK
Default Transmission not rev matching from third to second

I noticed that when downshifting my is350 2015 RWD f sport (8speed tranny in sport+, manual mode), it would rev match all downshifts except from 3 -> 2. Is that something that is350 RWD owners here experienced too?
Reply
Old Feb 7, 2020 | 11:36 AM
  #2  
arentz07's Avatar
arentz07
Moderator
5 Year Member
Shutterbug
Community Influencer
Community Favorite
 
Joined: Nov 2016
Posts: 9,593
Likes: 4,784
From: GA
Default

As you know, I have an IS 300 AWD but wanted to bump this because I am really curious about this. In my AWD, the 4-3 shift is not rev-matched either - unless I am heavily braking. 3-2 is always perfectly rev-matched.
Reply
Old Feb 7, 2020 | 12:03 PM
  #3  
HOMER350's Avatar
HOMER350
Racer
 
Joined: Mar 2018
Posts: 1,589
Likes: 317
From: SoCal
Default

Originally Posted by sunamer
I noticed that when downshifting my is350 2015 RWD f sport (8speed tranny in sport+, manual mode), it would rev match all downshifts except from 3 -> 2. Is that something that is350 RWD owners here experienced too?
Same here.

Even in Drive mode it's the rougher shift point, especially in Sport mode. There are numerous threads about 2nd and 3rd gear shifting behavior, but not so much about manual mode rev match.
But yeah it's always been like that and others have reported same or similar.
Reply
Old Feb 7, 2020 | 04:31 PM
  #4  
NickCaesar's Avatar
NickCaesar
Instructor
 
Joined: Jan 2019
Posts: 853
Likes: 175
From: Ontario
Default

Originally Posted by arentz07
As you know, I have an IS 300 AWD but wanted to bump this because I am really curious about this. In my AWD, the 4-3 shift is not rev-matched either - unless I am heavily braking. 3-2 is always perfectly rev-matched.
my 2015 350 awd Fsport rev matches every gear assuming manual mode, sport or sport+ and the rpm’s have to be very high, around 5k rpm for it to work & traction control fully disabled.
I think most ppl don’t realize how high the rpm’s have to be for the electronic rev matching to occur, so they think it’s not working/works poorly.
Also their was definitely a TCU reflash around 2015-2016 because some swear they can bounce it off the redline without it upshifting and others swear they can’t. I’ve also seen a lot of back and forth between owners saying they’re transmissions do something that another owner will claim doesn’t.

I can confirm I can downshift rev match all gears assuming I’m meeting the above mentioned prerequisites. I can also take car about 100 rpm PAST the redline indicator on the tach and it will not upshift, some have said they can’t.

Last edited by NickCaesar; Feb 7, 2020 at 08:39 PM.
Reply
Old Feb 7, 2020 | 04:49 PM
  #5  
sunamer's Avatar
sunamer
Thread Starter
Advanced
 
Joined: Nov 2018
Posts: 628
Likes: 184
From: OK
Default

Originally Posted by NickCaesar
my 2015 350 awd Fsport rev matches every gear assuming manual mode, sport or sport+ and the rpm’s have to be very high, around 5k rpm for it to work. I think most ppl don’t realize how high the rpm’s have to be for the electronic rev matching to occur, so they think it’s not working/works poorly.
Also their was definitely a TCU reflash around 2015-2016 because some swear they can bounce it off the redline without it upshifting and others swear they can’t. I’ve also seen a lot of back and forth between owners saying they’re transmissions do something that another owner will claim doesn’t.

I can confirm I can downshift rev match all gears assuming I’m meeting the above mentioned prerequisites. I can also take car about 100 rpm PAST the redline indicator on the tach and it will not upshift, some have said they can’t.
you mean, the resulting (after the downshift) rpm have to be high? Because if you try to downshift with rpm already sitting at 5k, it will not let you do that.

Last edited by sunamer; Feb 7, 2020 at 04:55 PM.
Reply
Old Feb 7, 2020 | 04:52 PM
  #6  
HOMER350's Avatar
HOMER350
Racer
 
Joined: Mar 2018
Posts: 1,589
Likes: 317
From: SoCal
Default

Originally Posted by NickCaesar
my 2015 350 awd Fsport rev matches every gear assuming manual mode, sport or sport+ and the rpm’s have to be very high, around 5k rpm for it to work. I think most ppl don’t realize how high the rpm’s have to be for the electronic rev matching to occur, so they think it’s not working/works poorly.
Also their was definitely a TCU reflash around 2015-2016 because some swear they can bounce it off the redline without it upshifting and others swear they can’t. I’ve also seen a lot of back and forth between owners saying they’re transmissions do something that another owner will claim doesn’t.

I can confirm I can downshift rev match all gears assuming I’m meeting the above mentioned prerequisites. I can also take car about 100 rpm PAST the redline indicator on the tach and it will not upshift, some have said they can’t.
hmm you may have a point. Never noticed at ~5k not rev matching. But it does it on the other gears at low rpm.

The production changed during 14 actually on the ability to bounce of the limiter. I remember looking up production month on mine to confirm, as mind does not and shifts up automatically.
Reply
Old Feb 7, 2020 | 06:10 PM
  #7  
Miintt's Avatar
Miintt
Pole Position
5 Year Member
Photogenic
Liked
 
Joined: Oct 2016
Posts: 306
Likes: 40
From: Ca
Default

My 16 200T behaves the same way @NickCaesar explained it. My car will rev match any gear as long as the revs are high enough. If the revs are not high enough it’ll downshift but will be really jerky. And I can bounce off rev limiter as long as I have traction control fully disabled. Might be different for you guys though because of the 6 speed in the AWDs
Reply
Old Feb 7, 2020 | 08:25 PM
  #8  
NickCaesar's Avatar
NickCaesar
Instructor
 
Joined: Jan 2019
Posts: 853
Likes: 175
From: Ontario
Default

Originally Posted by sunamer
you mean, the resulting (after the downshift) rpm have to be high? Because if you try to downshift with rpm already sitting at 5k, it will not let you do that.
Yes sorry if the downshift doesn’t result in bringing you to around at least 4500-5k rpm it doesn’t electrically rev match it just simply downshifts which can depending on gear and speed can result in a pretty good jerk.
Reply
Old Feb 7, 2020 | 08:34 PM
  #9  
NickCaesar's Avatar
NickCaesar
Instructor
 
Joined: Jan 2019
Posts: 853
Likes: 175
From: Ontario
Default

Originally Posted by HOMER350
hmm you may have a point. Never noticed at ~5k not rev matching. But it does it on the other gears at low rpm.

The production changed during 14 actually on the ability to bounce of the limiter. I remember looking up production month on mine to confirm, as mind does not and shifts up automatically.
Not a big loss, in terms of performance that extra 100-200rpm of extra rev doesn’t translate to anything. On a dyno technically I think it would (the most minuscule amount) but I think it’s just cool to see the needle actually pass redline a touch and knowing it won’t upshift makes the paddles a bit more of a challenge since they shift so dam slow so it’s hard to time the perfect shift.
Reply
Old Feb 9, 2020 | 12:22 PM
  #10  
arentz07's Avatar
arentz07
Moderator
5 Year Member
Shutterbug
Community Influencer
Community Favorite
 
Joined: Nov 2016
Posts: 9,593
Likes: 4,784
From: GA
Default

It's kind of hard for me to legally reach a speed at which downshifting into 3rd would result in ~5000 RPM you guys... I think I'd have to be going close to 80 MPH.
Reply
Old Feb 9, 2020 | 03:31 PM
  #11  
NickCaesar's Avatar
NickCaesar
Instructor
 
Joined: Jan 2019
Posts: 853
Likes: 175
From: Ontario
Default

Originally Posted by arentz07
It's kind of hard for me to legally reach a speed at which downshifting into 3rd would result in ~5000 RPM you guys... I think I'd have to be going close to 80 MPH.
vroom vroom!
Reply
Old Feb 9, 2020 | 05:43 PM
  #12  
kj07xk's Avatar
kj07xk
Instructor
10 Year Member
Photoriffic
Liked
Loved
 
Joined: Jan 2016
Posts: 1,180
Likes: 411
From: IL
Default

Originally Posted by arentz07
It's kind of hard for me to legally reach a speed at which downshifting into 3rd would result in ~5000 RPM you guys... I think I'd have to be going close to 80 MPH.
That’s why you’re downshifting when you spot the cop (e.g. I was cruising at 95 and spot the cop, unfortunately it was night so I had little warning, and he clocked me at 86 ).
Reply
Old Feb 10, 2020 | 06:55 AM
  #13  
arentz07's Avatar
arentz07
Moderator
5 Year Member
Shutterbug
Community Influencer
Community Favorite
 
Joined: Nov 2016
Posts: 9,593
Likes: 4,784
From: GA
Default

I just find it odd. Most other cars I've driven will rev-match no matter what. BMW? Rev-matches every time. GTI with DSG? Perfect rev match. PDK? Of course it rev-matches. But for some reason, a few Toyota/Lexus cars I've driven are inconsistent.

I found that it will rev-match if I am heavy braking. Like, 70% or more brake pressure. So, I am reading this as: "manual mode is for spirited driving only".

Now I will say, again, downshifting into second gear ALWAYS rev-matches appropriately in my car. No idea why third should be different.
Reply
Old Feb 10, 2020 | 01:23 PM
  #14  
m0chafrap's Avatar
m0chafrap
Rookie
 
Joined: Jul 2013
Posts: 72
Likes: 17
From: CA
Default

I've noticed the same. Under 30 mph, I can't get a rev matched downshift from 3->2. I've managed to squeeze a rev matched downshift at 29mph a few times. I wonder if it has something to do with the torque converter lockup? I know the lockup happens above 17-18 mph from my experience.
Reply
Old Feb 10, 2020 | 04:18 PM
  #15  
NickCaesar's Avatar
NickCaesar
Instructor
 
Joined: Jan 2019
Posts: 853
Likes: 175
From: Ontario
Default

Originally Posted by arentz07
I just find it odd. Most other cars I've driven will rev-match no matter what. BMW? Rev-matches every time. GTI with DSG? Perfect rev match. PDK? Of course it rev-matches. But for some reason, a few Toyota/Lexus cars I've driven are inconsistent.

I found that it will rev-match if I am heavy braking. Like, 70% or more brake pressure. So, I am reading this as: "manual mode is for spirited driving only".

Now I will say, again, downshifting into second gear ALWAYS rev-matches appropriately in my car. No idea why third should be different.
Let me start by saying I love my 350. Every time I see it, every time I start it, every time I drive it. But on the grand scale of performance their at the bottom.
All those transmissions you named are simply superior. In every way.
I can only talk about my 6 speed since I’m awd, but it’s not a great tranny performance wise, not even really a decent one even. Just barely acceptable as an entry level performer.

Lexus chooses reliability over performance and ultimately the brand suffers because even the “f sport” models are lacking seriously in performance. I’ve even heard people say the GSF needs more power.
I love Lexus, but my next car which I plan on getting in 1-2 years is going to be a true performer and tbh I know I’ll miss the reliability but you gotta pay to play and I need something faster.
Reply



All times are GMT -7. The time now is 01:01 AM.