Clunky Shift
Thread Starter
Driver School Candidate
Joined: Feb 2024
Posts: 24
Likes: 5
From: SK
Clunky Shift
24 LC500 coupe
I notice that when driving in automatic transmission, that if I am coming to a stop sign, as an example, and kind of slow and go, that I get a noticeable drop on stopping and a jerky clunk when accelerating. Sometimes the shift display goes from 3rd to 1st and sometimes it goes from 2nd to 1st. Then the jerk on accelerating happens, whether accelerating hard or slow.
Shouldn't such an advanced 10 speed transmission be a lot smoother?
Anyone else notice this?
I notice that when driving in automatic transmission, that if I am coming to a stop sign, as an example, and kind of slow and go, that I get a noticeable drop on stopping and a jerky clunk when accelerating. Sometimes the shift display goes from 3rd to 1st and sometimes it goes from 2nd to 1st. Then the jerk on accelerating happens, whether accelerating hard or slow.
Shouldn't such an advanced 10 speed transmission be a lot smoother?
Anyone else notice this?
Driver
Joined: Sep 2022
Posts: 69
Likes: 61
From: NV
It's not the super smoothest transmission for slower speeds. Actually neither are double-clutches.
In town simply put it in 'comfort' or even 'eco' mode if you dare, have a steady foot and it will be much better.
In town simply put it in 'comfort' or even 'eco' mode if you dare, have a steady foot and it will be much better.
I've been monitoring this thread since inception, and have been reluctant to join, but here goes:
IMHO, this is not a fault
The LC500 is a GT car with a performance automatic
My Silverado also has a 10 speed auto transmission. No what you folks are describing as clunks or jerks, very smooth - but no where near the performance of the 10 speed in the LC. The LC transmission behaves much like a dual clutch IMO. I had the Lexus 8 speed in my ISF, the LC 10 Speed is much better. I'm extremely pleased with the performance of my transmission
Lou
IMHO, this is not a fault
The LC500 is a GT car with a performance automatic My Silverado also has a 10 speed auto transmission. No what you folks are describing as clunks or jerks, very smooth - but no where near the performance of the 10 speed in the LC. The LC transmission behaves much like a dual clutch IMO. I had the Lexus 8 speed in my ISF, the LC 10 Speed is much better. I'm extremely pleased with the performance of my transmissionLou
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10th Gear
Joined: Mar 2024
Posts: 13
Likes: 14
24 LC500 coupe
I notice that when driving in automatic transmission, that if I am coming to a stop sign, as an example, and kind of slow and go, that I get a noticeable drop on stopping and a jerky clunk when accelerating. Sometimes the shift display goes from 3rd to 1st and sometimes it goes from 2nd to 1st. Then the jerk on accelerating happens, whether accelerating hard or slow.
Shouldn't such an advanced 10 speed transmission be a lot smoother?
Anyone else notice this?
I notice that when driving in automatic transmission, that if I am coming to a stop sign, as an example, and kind of slow and go, that I get a noticeable drop on stopping and a jerky clunk when accelerating. Sometimes the shift display goes from 3rd to 1st and sometimes it goes from 2nd to 1st. Then the jerk on accelerating happens, whether accelerating hard or slow.
Shouldn't such an advanced 10 speed transmission be a lot smoother?
Anyone else notice this?
Racer
Joined: Aug 2005
Posts: 1,274
Likes: 2
From: California
I've been monitoring this thread since inception, and have been reluctant to join, but here goes:
IMHO, this is not a fault The LC500 is a GT car with a performance automatic My Silverado also has a 10 speed auto transmission. No what you folks are describing as clunks or jerks, very smooth - but no where near the performance of the 10 speed in the LC.
IMHO, this is not a fault
The LC500 is a GT car with a performance automatic My Silverado also has a 10 speed auto transmission. No what you folks are describing as clunks or jerks, very smooth - but no where near the performance of the 10 speed in the LC. The BMW M vehicles (certainly high performance rated) use a ZF auto trans and those behave excellent. I blame Toyota for the poor programming of their transmissions. They just don't take the time to tune the programming of trans properly.
Pit Crew
Joined: Oct 2020
Posts: 175
Likes: 82
From: CA
well known issue going back to the IS F at least. GS F and IS 500 also have awful transmission tuning. At least for the IS F the ECU has been unlocked and you can reflash the programming. Pretty much everyone who has done it says the transmission performance is much better. Toyota just refuses to properly tune their “performance” transmissions. I don’t know what goal they think they are accomplishing but it doesn’t work. At least the 10 speed on the LC is better than the 8 speed.
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