6l80 2-3 Bind

[mikez71]

I would appreciate an explanation hjtrbo!

Would also love to know why my graphs for PCS pressures and TCC slip/pressures are basically spikey straight lines and not detailed like the everyone else's graphs?
(polling intervals were 0, and now 10ms as I can't select 0ms...) What am I doing wrong?

[ns158sl]

Was meaning if you needed an explanation on how it worked.

By all means!

I read Chris's explanation on an older thread, my understanding was for the ECM to keep a constant line pressure to self calibrate apply/release pressures? I also ASSume it ramps line depending on torque, either A: to prevent slipping being it is in a way "open loop" and B: Theoretical required line pressure for added torque.

It almost seems people spend so much time playing with the presets, but in actuality it is just a "start" for the adapts to take off from there. It really is shift times and clamp pressure is key to an adapted shift. I should be able to do some testing in a few days yet. I was hesitant of clamping adaptives, only because it is a daily driver. But will definitely go ahead for testing purposes.

Thanks again!

[TransGo Robert]

I would appreciate an explanation hjtrbo!

Would also love to know why my graphs for PCS pressures and TCC slip/pressures are basically spikey straight lines and not detailed like the everyone else's graphs?
(polling intervals were 0, and now 10ms as I can't select 0ms...) What am I doing wrong?

Can you take a screenshot of the "spiky straight lines" you are talking about, and attach it here, so that I can see and understand better what you mean. On my end looking at your log, the PIDs you mentioned graph nicely like any other ones I have ever looked at.

[ns158sl]

Would also love to know why my graphs for PCS pressures and TCC slip/pressures are basically spikey straight lines and not detailed like the everyone else's graphs?

I found one of your logs, that definitely seems like a polling interval issue/scanner issue. For a test, log only the 5 pressures at fastest available to choose. Maybe someone here knows or it is worth contacting support.

[mikez71]

Thank you both, don't mean to de-rail your thread!

Yep, seems like my TPS/RPM's are fine, but lots of charts spikey. I did remove a couple channels, slowed down the polling interval on others. No change.

spiky.png

Will do one with just a few pressures as suggested to test...
(I did open a support ticket for my missing OSS signal, the graph section lets me choose transfercase output speed, but it is not listed in the channels I can log.. )

[TransGo Robert]

Thank you both, don't mean to de-rail your thread!

Yep, seems like my TPS/RPM's are fine, but lots of charts spikey. I did remove a couple channels, slowed down the polling interval on others. No change.

spiky.png

Will do one with just a few pressures as suggested to test...
(I did open a support ticket for my missing OSS signal, the graph section lets me choose transfercase output speed, but it is not listed in the channels I can log.. )

Oh I did not realized you were not the OP! Now I see what you mean. I have no idea why the polling is so slow in yours, I would open a support ticket if it was me or start a new post of your own with your log attached asking for help with this problem.

[mikez71]

UPDATE: I'm an idiot, logging in standalone mode before. Hooked up a computer and it's looking good! Still no OSS, that's another thread.

Thank you, and please continue hjtrbo, Rob, and ns158sl!

[hjtrbo]

Actual torque (aka engine torque or trans torque etc.) is your x axis. It has 2 break points which define 3 zones. The y axis is a constant torque 'number' the trans will use as it's lookup value to the shift pressure table. The y axis value is determined by which x axis zone you're in.

E.g at 100 degC TOT.
x = 100Nm, y = Low -> Shift pressure lookup torque = 0Nm -> Shift pressure = 504kPa
x = 350Nm, y = Mid -> Shift pressure lookup torque = 300Nm -> Shift pressure = 800kPa
x = 450Nm, y = Hgh -> Shift pressure lookup torque = 600Nm -> Shift pressure = 1472Nm

[ns158sl]

This confirms what I was thinking. Someday I might learn your screenshot skills, but I doubt it, lol.

I still stand at the TCM doesnt know how to adapt when the line pressure is high.

There must be an adjustment for fill time, by rights a fast learn/long term adapts will learn pressure. Without any clue of getting a BIN/XDF, I don't think HPT support is going to go diving in this OS for that.

[mikez71]

Thanks for that hjtrbo!

[STAGEUP]

As a tuner, I HATE when wave plates are removed. Some trans builders will do things like remove wave plates, add clutches, etc, without explaining the pros and cons to the customer. So here we are, left to explain why you can't truly achieve a buttery smooth shift under part throttle after the tuning is complete.

[ns158sl]

Yeah I never did that with 4 speeds, I figured there was a way to tune for it with a CTC. For my personal experience I won't be doing this again, but I want to figure out how to work with these transmission issues in the future.

[ns158sl]

Alright I finally got around to testing. I would reset adapts and reset presets each time after flash KOEO. I then let it idle in drive off the brake for a couple min before recording. I havent had time to review the logs other than watching it real time during testing, I will be reviewing them later tonight. I only posted one Cal file being you can look at history of changes, which was only those three tables. I can post the other logs from 15 to 25 if needed.

[TransGo Robert]

Alright I finally got around to testing. I would reset adapts and reset presets each time after flash KOEO. I then let it idle in drive off the brake for a couple min before recording. I havent had time to review the logs other than watching it real time during testing, I will be reviewing them later tonight. I only posted one Cal file being you can look at history of changes, which was only those three tables. I can post the other logs from 15 to 25 if needed.

The 2-3 shift looks great now on the last one.

[hjtrbo]

Thanks for posting your results. Awesome work man.

[GHuggins]

So you made min, max and oncoming all the same and then raised off-going to allow more disengagement time? Nice... Did you just find that having all the presets the same made it easier to set things or it just keeps it from shifting the adapts around better?

Was there a reason for the drastic torque model changes?

[ns158sl]

Well this test was mostly for testing purposes/data along the lines of what Hjtrbo was saying. So I now I have to use that data to fix this, lol. Appears to still be in the low breakpoint for discrete shift pressure.

The tq tables are a work in progress, well I am still working on it today. Those were pretty hacked yet compared to today.