Jerky Transmission
10-05-20, 11:22 AM
#61
Lexus Test Driver
Yes no thanks on manual shifting. I'll borrow my son in law's M4 if I want to play with a stick.
10-05-20, 12:09 PM
#62
10-06-20, 01:59 AM
#63
10-06-20, 02:08 AM
#64
Instructor
Thread Starter
The reason is that if you drive it really gently like an old lady going to church on Sunday and do everything in slow motion, there is no problem at all. Totally Smooth. Sometimes my Brother drives my car, and he drives like this, just totally gentle on the gas pedal. My jerky transmission becomes smooth as glass. It is all about the drivers style.
Last edited by artbuc; 10-06-20 at 02:11 AM.
10-07-20, 04:21 PM
#65
Dealer had the car 8 days. Couldn't replicate the issue. Reset the "learning computer". As expected car runs a bit better. I guess that ends this threads for now... has anyone else brought this to there local dealers attention?
10-07-20, 04:59 PM
#66
Lexus Test Driver
I wouldn't bother because I would merely expect the diagnosis to say "performing as designed". Annoying if you do lots of stop and go but really no issue crusing on highway.
10-07-20, 06:03 PM
#67
Originally Posted by mikemu30
I wouldn't bother because I would merely expect the diagnosis to say "performing as designed". Annoying if you do lots of stop and go but really no issue crusing on highway.
10-10-20, 03:22 AM
#68
Intermediate
Do not expect a fix anytime soon. This is why I am still driving a 6 speed 2016. Toyota has been working on this since the 8 speed was introduced in the new Camry/ES350 etc. IMHO the jerking comes from the torque band that the engine operates in combined with the number of gears. The sluggish feel (lack of power/torque) is a product of the engine and rpm output combined with the transmission gear ratio.. Go take a drive in a Mustang GT or Camaro SS with a 10 speed. The power delivery and gear ratio make a huge difference.
Even the GS 350 has had an 8 speed trans for many years and nowhere near the reported issues.
If Toyota would change the gear ratios and add more lower rpm torque things may change. You should see the complaints on the Camry site.
Complaints and service calls will get attention, but normally corporate will do nothing until sales drop.
The Toyota Tundra with the famous Camshaft tower oil leak (basically all Toyota 5.7 engines) is a perfect example of corporate not addressing a huge design flaw. 82 pages since 2018. Leaks have been reported as far back as 2008 (Land Cruiser) https://www.tundras.com/threads/cam-...se-read.20102/
I love Toyota/Lexus, but I did not buy a 2019 Tundra (still driving my 05 Z71) and I did not buy a 2019 ES350 Fsport (bought a 2016) due to these reasons.
Hoping to get a new ES 350 soon. I know they have the capability to make this transmission shift better.
Even the GS 350 has had an 8 speed trans for many years and nowhere near the reported issues.
If Toyota would change the gear ratios and add more lower rpm torque things may change. You should see the complaints on the Camry site.
Complaints and service calls will get attention, but normally corporate will do nothing until sales drop.
The Toyota Tundra with the famous Camshaft tower oil leak (basically all Toyota 5.7 engines) is a perfect example of corporate not addressing a huge design flaw. 82 pages since 2018. Leaks have been reported as far back as 2008 (Land Cruiser) https://www.tundras.com/threads/cam-...se-read.20102/
I love Toyota/Lexus, but I did not buy a 2019 Tundra (still driving my 05 Z71) and I did not buy a 2019 ES350 Fsport (bought a 2016) due to these reasons.
Hoping to get a new ES 350 soon. I know they have the capability to make this transmission shift better.
10-12-20, 08:29 AM
#69
Certainly glad I stopped by to read up on the newer models. My 2010 has just over 100,000 miles on it and runs just as well as ever. With wait on a newer one til the transmission problem is fixed.
10-12-20, 09:37 AM
#70
Lexus Test Driver
10-12-20, 01:04 PM
#71
Pole Position
I still have faith Toyota can fix the 8 speed auto, and if not, redesign it for any upcoming refresh. In the mean time, Toyota needs to put on their big-boy pants, step to the plate, and take care of their loyal customers who purchased the not-ready-for-prime-time tranny!
It's reported the problem occurs when de-accelerating to a few miles per hour, then stepping on the gas to accelerate again. This is not caused by the number of gears, as the lowest gear ratio is the same in both the 6-speed and 8-speed autos. It is more likely due to the redesign of the lock-up clutch function (designed for "direct response driving"), or, the high performance compact torque converter (designed for improved mileage). Either of these, or the combination of the two, may be responsible for the jerking.
The issue may possibly be addressed by altering the ECU drive-by-wire throttle programming or the TCU programming to fine tune the operation of the solenoids which control the operation of the transmission. It's also possible programming could compensate for any issues the redesigned lock-up clutch or torque converter are causing.
If Toyota cannot resolve their shifting issues in the 8-speed, they will need to go back to the drawing board and start over. I'm afraid they have soiled their reputation again because of this, and are losing customers as we speak. Hopefully they'll learn a lesson from this and do better in the long run when unleashing new technology.
10-14-20, 05:53 PM
#73
Lexus Test Driver
Any fans of the Jerky Boys? 😎
10-15-20, 02:38 AM
#74
Instructor
Thread Starter
Quick update. I have tried every possible combo. Each time I thought the change cured the problem but quickly discovered it did not. Finally I went back to Normal mode driving in D as Lexus intended for most drivers. Slowly but surely I adjusted my driving style (more specifically how I modulated accelerator). It took a lot of concentration and was a real PITA but slowly, almost imperceptibly, it required less conscious effort. Yesterday, for the first time, I realized I was enjoying the way the car drove and wasn’t even thinking about my accelerator control. I have read several posts over on ToyotaNation where people said the ECU adapts to individual driving styles. I am not sure about that. I think it is more likely that people adapt to the car.
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dklanecky1 (10-15-20)
10-15-20, 05:42 AM
#75
Lexus Test Driver
Quick update. I have tried every possible combo. Each time I thought the change cured the problem but quickly discovered it did not. Finally I went back to Normal mode driving in D as Lexus intended for most drivers. Slowly but surely I adjusted my driving style (more specifically how I modulated accelerator). It took a lot of concentration and was a real PITA but slowly, almost imperceptibly, it required less conscious effort. Yesterday, for the first time, I realized I was enjoying the way the car drove and wasn’t even thinking about my accelerator control. I have read several posts over on ToyotaNation where people said the ECU adapts to individual driving styles. I am not sure about that. I think it is more likely that people adapt to the car.
I'm staying in SPORT mode regardless.