IS 500 Threads Conversations specifically about the 2022+ IS500 models.

Jerky low speed downshifts?

Thread Tools
 
Search this Thread
 
Old 02-22-24, 05:27 PM
  #1  
prophecywhiteis500
Pit Crew
Thread Starter
 
prophecywhiteis500's Avatar
 
Join Date: Feb 2024
Location: CA
Posts: 135
Received 134 Likes on 52 Posts
Default Jerky low speed downshifts?

Hello everyone,

I wanted to ask this question as it is 1 thing I've noticed with my new 500. Occasionally when I'm coasting to a stop without brakes, the auto transmission will downshift and it has a very noticeable clunkyness or jerkyness to it. I'm just wondering if this is normal?

It feels like an aggressive downshift which has a small jerk, very unsmooth transition. I only feel this when it downshifts at low speeds (approx 5-10 mph) and usually when I'm coasting to a stop and not applying brakes and it's occasionally, like a perfect combination of low gear, rpm and low speed? It's nothing crazy but I can definitely feel it.

Now I know I know this thing should've gotten the 10-speed , but I just want to make sure it's not a brand new transmission that might be acting up.
Old 02-22-24, 05:32 PM
  #2  
TGPCanada
Intermediate
 
TGPCanada's Avatar
 
Join Date: Jul 2021
Location: Ontario
Posts: 492
Received 800 Likes on 329 Posts
Default

There is a long thread on this and pretty much every owner on here has experienced this, and still experiences it. It gets better as the car is worked in, and definitely after the car warms up. I'm at 4,000 miles and still get it, but I don't give it a 2nd thought. Seems to be par for the course.
The following 3 users liked this post by TGPCanada:
DLPTony (02-23-24), Kanpai (02-23-24), PM22 (02-26-24)
Old 02-22-24, 06:17 PM
  #3  
prophecywhiteis500
Pit Crew
Thread Starter
 
prophecywhiteis500's Avatar
 
Join Date: Feb 2024
Location: CA
Posts: 135
Received 134 Likes on 52 Posts
Default

Originally Posted by TGPCanada
There is a long thread on this and pretty much every owner on here has experienced this, and still experiences it. It gets better as the car is worked in, and definitely after the car warms up. I'm at 4,000 miles and still get it, but I don't give it a 2nd thought. Seems to be par for the course.
ok apologies for the repeat post as I’m very new to the forum. Also good to know it’s par for the course for the 5 hundo as I didn’t feel it on my MY22 350, or if I did it was waaaay less noticeable.

Last edited by prophecywhiteis500; 02-22-24 at 06:20 PM.
Old 02-23-24, 08:55 AM
  #4  
TGPCanada
Intermediate
 
TGPCanada's Avatar
 
Join Date: Jul 2021
Location: Ontario
Posts: 492
Received 800 Likes on 329 Posts
Default

Originally Posted by prophecywhiteis500
ok apologies for the repeat post as I’m very new to the forum. Also good to know it’s par for the course for the 5 hundo as I didn’t feel it on my MY22 350, or if I did it was waaaay less noticeable.
No worries. I also came from an ultra-smooth, 21 AWD 350 (which is the 6-speed), so it caught me off guard initially as well. But the jerkiness is much better now, and you barely even notice it or acknowledge it after the vehicle has sufficiently warmed up.
But, to your point, this transmission is definitely not as smooth as the 350, or most other automatics.
The following users liked this post:
phoenix888 (02-23-24)
Old 02-23-24, 09:18 AM
  #5  
HJP12
Pit Crew
 
HJP12's Avatar
 
Join Date: Mar 2023
Location: AZ/ IL
Posts: 128
Received 137 Likes on 67 Posts
Default

Originally Posted by prophecywhiteis500
Hello everyone,

I wanted to ask this question as it is 1 thing I've noticed with my new 500. Occasionally when I'm coasting to a stop without brakes, the auto transmission will downshift and it has a very noticeable clunkyness or jerkyness to it. I'm just wondering if this is normal?

It feels like an aggressive downshift which has a small jerk, very unsmooth transition. I only feel this when it downshifts at low speeds (approx 5-10 mph) and usually when I'm coasting to a stop and not applying brakes and it's occasionally, like a perfect combination of low gear, rpm and low speed? It's nothing crazy but I can definitely feel it.

Now I know I know this thing should've gotten the 10-speed , but I just want to make sure it's not a brand new transmission that might be acting up.
I also experience the transmission shift while coming to a stop on my 2024 but was kind of aware of the issue from reading and watching all the reviews. As long as I know it is normal for this vehicle I can easily live with it and I really do enjoy driving it.
The following users liked this post:
PM22 (02-26-24)
Old 02-23-24, 09:21 AM
  #6  
phoenix888
Driver
 
phoenix888's Avatar
 
Join Date: Dec 2015
Location: CA
Posts: 93
Received 68 Likes on 29 Posts
Default

Same I have a 2022 LE, just over 9500 Miles. At 1st, the low speed down shift was extremely noticeable. But just take care to warm your car up prior to driving and as the Tranny/Engine "Break in" it's a non issue. Even when i go to Manual Mode and downshift from 3 to 2 and 2 to 1, it's no longer as jerky as when I 1st bought the car so you'll be fine.

Congrats and Welcome to the FORUM!
Old 02-23-24, 10:09 AM
  #7  
Renault
Intermediate
 
Renault's Avatar
 
Join Date: Feb 2022
Location: CA
Posts: 270
Received 282 Likes on 141 Posts
Default

Originally Posted by phoenix888
At 1st, the low speed down shift was extremely noticeable. But just take care to warm your car up prior to driving and as the Tranny/Engine "Break in" it's a non issue. Even when i go to Manual Mode and downshift from 3 to 2 and 2 to 1, it's no longer as jerky as when I 1st bought the car so you'll be fine.
I second this, don't know if it's due to a break in period or the transmission adjusting to driving habits, but I don't experience the jerky downshifts anymore in daily driving
The following users liked this post:
phoenix888 (02-23-24)
Old 02-23-24, 10:41 AM
  #8  
arentz07
drives cars
 
arentz07's Avatar
 
Join Date: Nov 2016
Location: GA
Posts: 8,491
Received 3,805 Likes on 1,930 Posts
Default

Originally Posted by Renault
I second this, don't know if it's due to a break in period or the transmission adjusting to driving habits, but I don't experience the jerky downshifts anymore in daily driving
Odd. I've got over 9,000 miles on mine, and I still experience it when the car is cold. It gets better when the car has warmed up, but still happens occasionally even when warm.
The following users liked this post:
jsch222 (02-25-24)
Old 02-23-24, 11:05 AM
  #9  
Benibiker1558
Intermediate
 
Benibiker1558's Avatar
 
Join Date: Aug 2023
Location: Hawaii
Posts: 359
Received 388 Likes on 172 Posts
Default

Originally Posted by arentz07
Odd. I've got over 9,000 miles on mine, and I still experience it when the car is cold. It gets better when the car has warmed up, but still happens occasionally even when warm.
Mine might be a little less harsh warmed up but it's definitely still there all the time. I've learned to expect it and sort of like it. I've noticed it has a lot to do with how hard you brake too. If you slowly smoothly come to a stop it's less noticeable but harder and quicker stops produce a harsher downshift.

Last edited by Benibiker1558; 02-23-24 at 11:41 AM.
The following users liked this post:
TGPCanada (02-23-24)
Old 02-23-24, 12:29 PM
  #10  
macmaster
Pole Position
 
macmaster's Avatar
 
Join Date: Dec 2010
Location: SoCal
Posts: 2,780
Received 1,957 Likes on 1,048 Posts
Default

Originally Posted by Benibiker1558
I've noticed it has a lot to do with how hard you brake too. If you slowly smoothly come to a stop it's less noticeable but harder and quicker stops produce a harsher downshift.
OP was noticing it when coasting not braking, which is normal.

Originally Posted by Benibiker1558
I've learned to expect it and sort of like it.
Stockholm syndrome.

Old 02-23-24, 12:35 PM
  #11  
95bat
Racer
 
95bat's Avatar
 
Join Date: May 2012
Location: CA
Posts: 1,894
Received 1,329 Likes on 681 Posts
Default

Originally Posted by Benibiker1558
I've learned to expect it and sort of like it.
Are we talking about the jerking or the banging 😂
The following 6 users liked this post by 95bat:
Benibiker1558 (02-23-24), DLPTony (02-23-24), jsch222 (02-25-24), phoenix888 (02-23-24), TGPCanada (02-24-24), wfibear (02-23-24) and 1 others liked this post. (Show less...)
Old 02-23-24, 01:43 PM
  #12  
Benibiker1558
Intermediate
 
Benibiker1558's Avatar
 
Join Date: Aug 2023
Location: Hawaii
Posts: 359
Received 388 Likes on 172 Posts
Default

^^^ That really made me laugh out loud !!!
The following 2 users liked this post by Benibiker1558:
95bat (02-23-24), carlosclarkmd (03-02-24)
Old 02-23-24, 07:54 PM
  #13  
DLPTony
Pole Position
 
DLPTony's Avatar
 
Join Date: Nov 2010
Location: GA
Posts: 2,880
Received 3,993 Likes on 1,844 Posts
Default

Originally Posted by 95bat
Are we talking about the jerking or the banging 😂
🤭😂😈😜🤣

Hilarious.

Old 02-24-24, 06:25 AM
  #14  
RubyV8
Driver
 
RubyV8's Avatar
 
Join Date: Dec 2022
Location: VA
Posts: 90
Received 51 Likes on 20 Posts
Default

Originally Posted by prophecywhiteis500
ok apologies for the repeat post as I’m very new to the forum. Also good to know it’s par for the course for the 5 hundo as I didn’t feel it on my MY22 350, or if I did it was waaaay less noticeable.
Someone else shared this but IMO best way to not experience the downshift friction is driving in manual mode and letting the trans handle the downshift (no manual intervention). Goes 3–>1 like butter
Old 02-26-24, 09:01 AM
  #15  
wfibear
Pit Crew
 
wfibear's Avatar
 
Join Date: Jul 2014
Location: GA
Posts: 115
Received 35 Likes on 17 Posts
Default

Pretty normal, especially with the 5->3 this car seems to like doing in auto mode. The 3->1 can do it too, if you happen to let off the brake right as it's shifting to 1. As others have said, manual mode and letting it downshift automatically at the low RPM threshold works better, since that's a lower RPM shift than auto mode does. The 3->1 does this at least a little bit on the RWD 350s, too, but not nearly as bad or as often. Seems to be somewhat of artifact of how they tune the 8 speed transmissions, but ours on the 2URs are definitely the clunkiest.

Only somewhat related but I wonder if anyone else has noticed occasional shift flare within the first few minutes of driving in colder weather (like sub-40F). According to the IS F guys it's not unusual, maybe even somewhat common, and even on factory ATF fill. Sounds like it has to do with fluid expansion and contraction due to temperature. I hadn't seen anyone mention it for our 500s yet.


Quick Reply: Jerky low speed downshifts?



All times are GMT -7. The time now is 05:44 PM.