Tacoma - OVTUNE - VFTUNER - Update Info and Original Development

mZiggy · Feb 16, 2018

I was so excited when the manual trans was announced

2016trdtacoma · Feb 16, 2018

mZiggy said: ↑

I was so excited when the manual trans was announced
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haha, cool idea however.

RushT · Feb 16, 2018

Your reverse is tagged wrong....

You occasionally grind because of that?

mZiggy · Feb 16, 2018

RushT said: ↑

Your reverse is tagged wrong....

You occasionally grind because of that?

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Lol no, It's in the correct orientation. It's meant to be viewed as if you're facing me with my arm down. However, that made it really difficult to take a photo with the shift knob

dYL0n · Feb 16, 2018

mZiggy said: ↑

Lol no, It's in the correct orientation. It's meant to viewed facing me with my arm down. However, that made it really difficult to take a photo with the shift knob
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Was your shift knob backwards???

mZiggy · Feb 16, 2018

I have that one on my right wrist since I shift stick with that hand, and I've a matching one on my left wrist, but with the 1 down, 5 up for a bike

mZiggy · Feb 16, 2018

dYL0n said: ↑

Was your shift knob backwards???
Click to expand...

I mean, I do suppose if I was really desperate I could have turned the knob around, taken the photo upside down and then flipped it in the photo editor...but no, too much work lol

2016trdtacoma · Feb 16, 2018

Well, I ll have to check out this thread in the morning, can't stay awake any longer...

RushT · Feb 16, 2018

I’ll have to remember the ‘gearbox’ tat for when I get to an age where I don’t care anymore.

I have a thing for Porsche, and they’ve certainly had enough patterns I could take my pick.

It’s either something like that or something water based. Miss my sailing years.

Shellshock · Feb 16, 2018

Guess it’s time to head to bed. Hopefully there’s a nice gift waiting in the morning. I got nothing to do all weekend so I might as well exercise the freshly updated taco

rnicholls · Feb 16, 2018

Flash manager looks neat but I think it'd be nice if the tunes were version labeled on top of ecu version in the menu. Could just be me though.

Chipi3s · Feb 16, 2018

OVTune[OP] said: ↑

I almost forgot to talk a little bit about toyota's beautifully done transmission tune.. and adaptive failability.

Toyota's transmission adaptation - smart learning.
So I have figured out how it works, and how to effectively mute it.

There are table sets that work with eachother to modify shifting based on the initial shift set parameters (2D tables which I have modified in the 1.02C tunes to make shift changes to enhance rpm per gear). This doesn't solve the the transmission adaptation tables though.

So as the transmission starts at the lowest adaptation tables, the transmission is softer, it will allow for the engine RPM peak to be higher in each gear before shifting, and without the use of the torque converter lock, which improves a smooth shift.

As the transmission uses the next value set (table) over a period of time, it uses higher thresholds which create a requested quicker shift event. So on lower thresholds, there is more "allowance" in between gear shifts for rpm.
as the tables move forward, there is less and less "allowance."
In the beginning, you notice that the shifting is good, the rpm in each gear before shifting is acceptable. Then it goes to the next table, as a result everything is lowered and lock up is quicker to engage.
This means very low RPM, very quickly upshift, and locking of the torque converter, but WITHOUT the ability to use higher throttle. This makes the truck feel like it weighs 50,000 lbs.

for example ;

Once it has reached this peak table, I have not seen the occurrence of ever going back to previous tables, however it's difficult to confirm that without additional logging of RAM values. Regardless it's easy to see by how the truck responds.

The solution in 1.03 is to create a blend table so that the ECU is still allowed to perform it's "learning" which is required for the code, but without any actual learning to take place. It will still be able to move between it's necessary table selection, without any changes becoming effective.

The issue in the past with trying to solve this was looking at it the wrong way without the necessary data (needing a test truck). The tables cannot all be set the same, they can't be copy and pasted either. The reason is there are some tables for different drive and shifting modes, which require certain torque control values. The solution was to "disable" the learning...by allowing it to learn..nothing new.

By doing this it lets the truck react the same way from when you first flash it.

Click to expand...

Torque learning has been stupified. No more learning! Thats great news.

OVTune · Feb 16, 2018

working on a few last things.

MESO · Feb 16, 2018

Chipi3s said: ↑

Torque learning has been stupified. No more learning! Thats great news.
Click to expand...

ThatOneTaco · Feb 16, 2018

My anticipation boner went soft....

redaccount36 · Feb 17, 2018

17TRDOR · Feb 17, 2018

redaccount36 said: ↑

Click to expand...

HA tricked yaaaaaa

go2cnavy · Feb 17, 2018

@OVTune learning nothing new is a brilliant solution. #GroundHogDay flash

I’m really confused with the logic Toyota used to determine when/why the transmission uses different table values.

Some have said that its adaptability is influenced by the driver. So, assuming this is true (and we label this negative performance learning as “left-to-right” learning) does the stock tune allow for the driver inputs to influence the reverse “right-to-left” learning over time?

DavidM310 · Feb 17, 2018

Shellshock · Feb 17, 2018

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RushT Amateur Everythingist

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mZiggy Honey badger

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