TCC Modes?

[DrX]

Well, I have rebuilt the entire tune on a fresh PCM with no change to the overheating issue. I do notice in the logs that the TCC slip is higher in AppEn mode than OFF mode. Not sure what is triggering AppEn when lockup speed has not yet been attained? There appears to be normal AppEn > App > Lock sequences after lockup speeds have been reached(in other log files).

The converter does lock, and very aggressively, when it is supposed to. The temp does still climb even during prolonged periods of TCC lockup.

You will also see a throttle blip at frame 5980 in this log .....should the slip not go to 0 at the converter stall speed of 2400-2600? The other converter behaved the same, so it is not likely a converter issue.

[joecar]

The slip rpm difference will not go to zero at/past stall/coupling speed...

the converter is fluid-coupling, but there still is a small speed difference, so the slip will be at its TCC-unlocked minimum...

and of course it should be zero with TCC locked.

[joecar]

Heads up, set these to in-range (not relevant to thread topic):

EFILive Custom Calibrations
{A0000} Forced Octane Scaler, was out of range when loaded.
{A0001} Forced Octane Scaler Percentage, was out of range when loaded.
{A0002} Octane Scaler Limiter, was out of range when loaded.

Trans parameters look ok to me...

[joecar]

Did you follow this (I know you did, but I'm sanity checking):

I'm thinking you should have gone:

stock tune -> 4L80E segment swap -> COS3

you could still do that and copy in your scaled tables.

[joecar]

Try setting D0409 to No Switch.

[joecar]

Just a hunch:

try setting the Throttle Kickdown tables to 100%...

try settinh=g the Shift Stablization Ratios to 2x or 3x their current value...

( I don't think this will lower temp in any way ).

[joecar]

Your log does not show TCC locking... post a log showing TCC locking for extended period.

[DrX]

The slip rpm difference will not go to zero at/past stall/coupling speed...

the converter is fluid-coupling, but there still is a small speed difference, so the slip will be at its TCC-unlocked minimum...

and of course it should be zero with TCC locked.

I should have said "toward" 0. The slip actually increases when the engine RPM is greater than the stall speed.

Heads up, set these to in-range (not relevant to thread topic):


Trans parameters look ok to me...

Not sure why those would show as out of range for you. It is not even possible for A0000 to be out of range (Enable/Disable). I did notice that sometimes when I compare 2 tunes some parameters that are identical show up in the differences list or an Enable might show as 255 for 1 tune and be considered different???

The trans tables are directly from a stock 80E cal except that I have removed the 2nd gear lockup over 90% throttle that is in the stock tunes.

Did you follow this (I know you did, but I'm sanity checking):

Yes.

Try setting D0409 to No Switch.

There is a switch but the factory setting is Class 2 Databus. I will try changing that setting.

[DrX]

Your log does not show TCC locking... post a log showing TCC locking for extended period.

Look at frames 5360 to 6660 in this log where the TCC is locked for over 2 minutes. The temp still increases another 14*. It never decreases.

[joecar]

...
Not sure why those would show as out of range for you. It is not even possible for A0000 to be out of range (Enable/Disable). I did notice that sometimes when I compare 2 tunes some parameters that are identical show up in the differences list or an Enable might show as 255 for 1 tune and be considered different???
...

When I re-opened your tune file today, those were in-range, I don't understand what happened... hmmm.