New Issue

[SinCityFX4]

Originally Posted by 88Racing

What do you have everything set up at?
What's the torque coverter doing? What's on the display?
What's the shift firmness setting at?

Lars

I have altered nothing from how Bill sent the tune. I will monitor the gear to check for shifting/TC issues. WHat other PID's could I utilize to better diagnose this issue?

The edge/gryphon software/settings is new to me..

[soutthpaw]

Interesting, I was just reading a tech article about TC hard lockup issues and they pointed out that its not always TC/ trans issue
"A simple random misfire
could prevent the PCM from engaging
the converter clutch, and there need not
be a DTC set for this to occur. Yet openloop
scenarios, faulty ECT sensors and
VSS problems are still the familiar reasons
for a loss of TCC. A more sophisticated
TCC apply strategy provides additional
possible causes for its malfunction"

Probably not you case but you may want to PM Cody and see if he has any ideas...

[Jackpine]

I don't think he's got a diesel, southpaw.

But, it works good for a while and then goes south?

I suspect, sadly, this is another job for the Mad Doctor!

- Jack

[SinCityFX4]

THe tranny always does not shift good from 1-2 at any load and sometimes 3-4 under light-moderate load.

The bizarre shudder wtf deal happens every now and then.

I tried PM'ing Bill. We'll see.

[SinCityFX4]

Ok, so I changed to monitor some different values. I have hte Gear Comm and TC monitoring along with the RPM's and TFT.

When I get the shudder it is usually in 2nd gear with the TQ converter locked and the TC showing a value of 5. Whatever that is??

[88Racing]

Okay I've used that feature before here is some of the values I remember. Level was at 0 stock.
These are upshfts.

1-2. #0
2-3. #5-7 briefly.
3-4. #0
4. #14 only with cruise on.

Lars

[Jackpine]

Any idea what those numbers mean, Lars? I've never monitored that particular readout.

SinCity - is it true we're talking about part throttle shifts here, or are you at WOT and hard acceleration? The reason I ask, is because my transmission spends so little time in 1st and 2nd gears under normal acceleration, that it's almost like they don't exist. I've NEVER seen the TC lockup in 1st or 2nd. I've seen it lock at times in 3rd, on the highway in a hill climb situation shortly before shifting back to 4th and that one tends to be a "harsh" shift.

Perhaps you'd benefit from my Custom Options settings:

1-2, 2-1 upshift/downshift: -2
2-3, 3-2 upshift/downshift: -3
3-4, 4-3 upshift/downshift: -5
1-2, 2-1 TC lock/unlock: -3
2-3, 3-2 TC lock/unlock: -5
3-4, 4-3 TC lock/unlock: -10

I may not have the TC values correct here for 1-2, 2-1 and 2-3, 3-2, but I set them at the MAX negative limits.

My reasoning was that I wanted to shift as rapidly as possible into 4th and have the TC lock up as soon as possible to save gas. I don't HAVE to beat everyone to the next light, I just want to flow with them. And, I wanted to delay the downshift/TC unlock for the same reason, in normal driving.

It all seems to work out fine for me. I get very quickly into 4th (at about 40 mph) and the over eagerness to downshift or get TC unlock at part throttle I've talked about in previous posts during mild hill climbs is largely gone. I even have these settings in place when I pull our trailer, and it somehow, feels better.

None of this effects WOT shifting though. The power's still there when I need it.

- Jack

[Power Hungry]

Originally Posted by SinCityFX4

Ok, so I changed to monitor some different values. I have hte Gear Comm and TC monitoring along with the RPM's and TFT.

When I get the shudder it is usually in 2nd gear with the TQ converter locked and the TC showing a value of 5. Whatever that is??

Torque Control Mode 5 = Spark Cut for Tip-In Shock Control

Here's the full TC Mode definition list:

00: No Torque Control Requested
01: Fuel Cut for Low Line Pressure
02: Fuel and/or Spark Cut for Traction Control
03: Fuel Cut for Speed Control
04: Fuel Cut for Rev Control
05: Spark Cut for Tip-In Shock Control
06: Fuel Cut for Decel
07: Spark Cut for Transmission Shift Contol
08: Fuel and Spark Cut for Excessive Engine Oil Temp
09: Fuel Cut for Excessive Engine Coolant Temp
10: Disable Current Torque Mode to Prevent Stalling
11: Fuel Cut for Turbo Control
12: Fuel Cut for Anti-Theft
13: Spark Cut for Tip-In Engine Lugging
14: ETC - Electronic Throttle Control only

Keep in mind that only highest priority (lowest number) TC mode takes precedence.

My guess is that what you're feeling might be related to a timing issue. This may also have something to do with the backfiring issue. Let me know which tunes this is occurring on and I'll make some changes to the timing tables which I think should resolve the problem.

Take care.

[88Racing]

That would make a great sticky Bill!

Thanks for posting them.

Lars

[SinCityFX4]

Originally Posted by Power Hungry

Torque Control Mode 5 = Spark Cut for Tip-In Shock Control

Here's the full TC Mode definition list:

00: No Torque Control Requested
01: Fuel Cut for Low Line Pressure
02: Fuel and/or Spark Cut for Traction Control
03: Fuel Cut for Speed Control
04: Fuel Cut for Rev Control
05: Spark Cut for Tip-In Shock Control
06: Fuel Cut for Decel
07: Spark Cut for Transmission Shift Contol
08: Fuel and Spark Cut for Excessive Engine Oil Temp
09: Fuel Cut for Excessive Engine Coolant Temp
10: Disable Current Torque Mode to Prevent Stalling
11: Fuel Cut for Turbo Control
12: Fuel Cut for Anti-Theft
13: Spark Cut for Tip-In Engine Lugging
14: ETC - Electronic Throttle Control only

Keep in mind that only highest priority (lowest number) TC mode takes precedence.

My guess is that what you're feeling might be related to a timing issue. This may also have something to do with the backfiring issue. Let me know which tunes this is occurring on and I'll make some changes to the timing tables which I think should resolve the problem.

Take care.

Dude...I totally saved that list as a datafile for future reference

I sent you a PM with some info....I can data-log if that will help you out to save time. Thx Bill!!!!